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this is information on a product in full production. march 2016 docid027100 rev 3 1/147 stm32l072x8 STM32L072XB stm32l072xz ultra-low-power 32-bit mcu arm ? -based cortex ? -m0+, up to 192kb flash, 20kb sram, 6kb eeprom, usb, adc, dacs datasheet - production data features ? ultra-low-power platform ? 1.65 v to 3.6 v power supply ? - 40 to 125 c temperature range ? 0.29 a standby mode (3 wakeup pins) ? 0.43 a stop mode (16 wakeup lines) ? 0.86 a stop mode + rtc + 20 kb ram retention ? down to 93 a/mhz in run mode ? 5 s wakeup time (from flash memory) ? 41 a 12-bit adc conversion at 10 ksps ? core: arm ? 32-bit cortex ? -m0+ with mpu ? from 32 khz up to 32 mhz max. ? 0.95 dmips/mhz ? reset and supply management ? ultra-safe, low-power bor (brownout reset) with 5 selectable thresholds ? ultra-low-power por/pdr ? programmable voltage detector (pvd) ? clock sources ? 1 to 25 mhz crystal oscillator ? 32 khz oscillator for rtc with calibration ? high speed internal 16 mhz factory-trimmed rc (+/- 1%) ? internal low-power 37 khz rc ? internal multispeed low-power 65 khz to 4.2 mhz rc ? internal self calibration of 48 mhz rc for usb ? pll for cpu clock ? pre-programmed bootloader ? usb, usart supported ? development support ? serial wire debug supported ? up to 84 fast i/os (78 i/os 5v tolerant) ? memories ? up to 192 kb flash memory with ecc(2 banks with read-while-write capability) ?20 kb ram ? 6 kb of data eeprom with ecc ? 20-byte backup register ? sector protection against r/w operation ? rich analog peripherals ? 12-bit adc 1.14 msps up to 16 channels (down to 1.65 v) ? 2 x 12-bit channel dacs with output buffers (down to 1.8 v) ? 2x ultra-low-power comparators (window mode and wake up capability, down to 1.65 v) ? up to 24 capacitive sensing channels supporting touchkey, linear and rotary touch sensors ? 7-channel dma controller, supporting adc, spi, i2c, usart, dac, timers ? 11x peripheral communication interfaces ? 1x usb 2.0 crystal-less, battery charging detection and lpm ? 4 x usart ( 2 with iso 7816, irda), 1x uart (low power) ? up to 6x spi 16 mbits/s ? 3 x i2c ( 2 with smbus/pmbus) ? 11x timers: 2x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x systick, 1x rtc, 2x 16-bit basic for dac, and 2x watchdogs (independent/window) ? crc calculation unit, 96-bit unique id ? true rng and firewall protection ? all packages are ecopack ? 2 table 1. device summary reference part number stm32l072x8 stm32l072v8 STM32L072XB stm32l072vb, stm32l072rb, stm32l072cb, stm32l072kb stm32l072xz stm32l072vz, stm32l072rz, stm32l072cz, stm32l072kz ) % * $ lqfp32 7x7 mm lqfp48 7x7 mm lqfp64 10x10 mm lqfp100 14x14 mm wlcsp49 (3.294x3.258 mm) ufbga64 tfbga64 5x5mm ufbga100 7x7 mm ) % * $ ufqfpn32 5x5 mm www.st.com
contents stm32l072xx 2/147 docid027100 rev 3 contents 1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2 ultra-low-power device continuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.1 low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 interconnect matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.3 arm? cortex?-m0+ core with mpu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.4 reset and supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.4.1 power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.4.2 power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.4.3 voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.5 clock management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.6 low-power real-time clock and backup registers . . . . . . . . . . . . . . . . . . . 26 3.7 general-purpose inputs/outputs (gpios) . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.8 memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.9 boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.10 direct memory access (dma) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.11 analog-to-digital converter (adc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.12 temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.12.1 internal voltage reference (v refint ) . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.13 digital-to-analog converter (dac) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.14 ultra-low-power comparators and reference voltage . . . . . . . . . . . . . . . . 30 3.15 touch sensing controller (tsc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.16 timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.16.1 general-purpose timers (tim2, tim3, tim21 and tim22) . . . . . . . . . . . 32 3.16.2 low-power timer (lptim) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.16.3 basic timer (tim6, tim7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.16.4 systick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.16.5 independent watchdog (iwdg) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 docid027100 rev 3 3/147 stm32l072xx contents 4 3.16.6 window watchdog (wwdg) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.17 communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.17.1 i2c bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.17.2 universal synchronous/asynchronous receiver transmitter (usart) . . 34 3.17.3 low-power universal asynchronous receiver transmitter (lpuart) . . . 35 3.17.4 serial peripheral interface (spi)/inter-integrated sound (i2s) . . . . . . . . 35 3.17.5 universal serial bus (usb) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.18 clock recovery system (crs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.19 cyclic redundancy check (crc) calculation unit . . . . . . . . . . . . . . . . . . . 36 3.20 serial wire debug port (sw-dp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4 pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5 memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 6 electrical characteristi cs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1 parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.1 minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.2 typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.3 typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.4 loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.5 pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.1.6 power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.1.7 current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 6.3 operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 6.3.1 general operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 6.3.2 embedded reset and power control bloc k characteristics . . . . . . . . . . . 64 6.3.3 embedded internal reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 65 6.3.4 supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 6.3.5 wakeup time from low-power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 6.3.6 external clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 6.3.7 internal clock source charac teristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 6.3.8 pll characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 6.3.9 memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 6.3.10 emc characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.3.11 electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 contents stm32l072xx 4/147 docid027100 rev 3 6.3.12 i/o current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.3.13 i/o port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 6.3.14 nrst pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 6.3.15 12-bit adc characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 6.3.16 dac electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 6.3.17 temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 6.3.18 comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 6.3.19 timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 6.3.20 communications interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 7 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 7.1 lqfp100 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118 7.2 ufbga100 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 7.3 lqfp64 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 7.4 ufbga64 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 7.5 tfbga64 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 7.6 wlcsp49 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 7.7 lqfp48 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 7.8 lqfp32 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 7.9 ufqfpn32 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 7.10 thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 7.10.1 reference document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 8 part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 docid027100 rev 3 5/147 stm32l072xx list of tables 7 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. ultra-low-power stm32l072xx device features and peripheral counts . . . . . . . . . . . . . . . 12 table 3. functionalities depending on the operating power supply range . . . . . . . . . . . . . . . . . . . . 17 table 4. cpu frequency range depending on dynamic voltag e scaling . . . . . . . . . . . . . . . . . . . . . . 17 table 5. functionalities depending on the working mode ? (from run/active down to standby) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 table 6. stm32l0xx peripherals interconnect matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 table 7. temperature sensor calibration values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 8. internal voltage reference measured values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 9. capacitive sensing gpios available on stm32l07 2xx devices . . . . . . . . . . . . . . . . . . . . 31 table 10. timer feature comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 11. comparison of i2c analog and digital filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 12. stm32l072xx i 2 c implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 13. usart implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 14. spi/i2s implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 15. legend/abbreviations used in the pinout table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 table 16. stm32l072xxx pin definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 table 17. alternate functions port a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 table 18. alternate functions port b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 table 19. alternate functions port c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 table 20. alternate functions port d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 table 21. alternate functions port e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 table 22. alternate functions port h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 table 23. voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 table 24. current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 table 25. thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 table 26. general operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 table 27. embedded reset and power control block characterist ics. . . . . . . . . . . . . . . . . . . . . . . . . . 64 table 28. embedded internal reference voltage calibration valu es . . . . . . . . . . . . . . . . . . . . . . . . . . 65 table 29. embedded internal reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 table 30. current consumption in run mode, code with data processing running from ? flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 table 31. current consumption in run mode vs code type, ? code with data processing running from flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 table 32. current consumption in run mode, code wit h data processing running from ram . . . . . . 69 table 33. current consumption in run mode vs code type, ? code with data processing running from ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 table 34. current consumption in sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 table 35. current consumption in low-power run mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 table 36. current consumption in low-power sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 table 37. typical and maximum current consumptions in st op mode . . . . . . . . . . . . . . . . . . . . . . . . 73 table 38. typical and maximum current consumptions in standby mode . . . . . . . . . . . . . . . . . . . . . 74 table 39. average current consumption during wakeup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 table 40. peripheral current consumption in run or sleep mo de . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 table 41. peripheral current consumption in stop and stan dby mode . . . . . . . . . . . . . . . . . . . . . . . 78 table 42. low-power mode wakeup timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 table 43. high-speed external user clock characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 table 44. low-speed external user clock characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 list of tables stm32l072xx 6/147 docid027100 rev 3 table 45. hse oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 table 46. lse oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 table 47. 16 mhz hsi16 oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 table 48. hsi48 oscillator characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 table 49. lsi oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 table 50. msi oscillator ch aracteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 table 51. pll characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 table 52. ram and hardware registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 table 53. flash memory and dat a eeprom characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 table 54. flash memory and data eeprom endurance and retention . . . . . . . . . . . . . . . . . . . . . . . 88 table 55. ems characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 table 56. emi characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 table 57. esd absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 table 58. electrical sensitivities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 table 59. i/o current injection susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 table 60. i/o static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 table 61. output voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 table 62. i/o ac characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 table 63. nrst pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 table 64. adc characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 table 65. r ain max for f adc = 16 mhz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 table 66. adc accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 table 67. dac characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 table 68. temperature sensor calibration values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 table 69. temperature sensor characteristic s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 table 70. comparator 1 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 table 71. comparator 2 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 table 72. timx characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 table 73. i2c analog filter characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 table 74. usart/lpuart characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 table 75. spi characteristics in voltage range 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 0 table 76. spi characteristics in voltage range 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1 table 77. spi characteristics in voltage range 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2 table 78. i2s characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 table 79. usb startup time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 table 80. usb dc electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 table 81. usb: full speed electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 17 table 82. lqpf100 - 100-pin, 14 x 14 mm low-profile quad flat package ? mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 table 83. ufbga100 - 100-pin, 7 x 7 mm, 0.50 mm pitch, ultra fine pitch ball grid array ? package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 table 84. ufbga100 recommended pcb design rules (0.5 mm pitch bga) . . . . . . . . . . . . . . . . . 122 table 85. lqfp64 - 64-pin, 10 x 10 mm low-profile quad flat ? package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 table 86. ufbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch ultra profile fine pitch ? ball grid array package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 table 87. ufbga64 recommended pcb design rules (0.5 mm pitch bga) . . . . . . . . . . . . . . . . . . 127 table 88. tfbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch, thin profile fine pitch ball ? grid array package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 table 89. tfbga64 recommended pcb design rules (0.5 mm pitch bga). . . . . . . . . . . . . . . . . . . 130 table 90. wlcsp49 - 49-pin, 3.294 x 3.258 mm, 0.4 mm pitch wafer level chip scale ? package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 docid027100 rev 3 7/147 stm32l072xx list of tables 7 table 91. wlcsp49 recommended pcb design rules (0.4 mm pi tch) . . . . . . . . . . . . . . . . . . . . . . 134 table 92. lqfp48 - 48-pin, 7 x 7 mm low-profile quad flat package mechanical data. . . . . . . . . . . 136 table 93. lqfp32 - 32-pin, 7 x 7 mm low-profile quad flat package mechanical data. . . . . . . . . . . 139 table 94. ufqfpn32 - 32-pin, 5x5 mm, 0.5 mm pitch ultra thin fine pitch quad flat ? package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 table 95. thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 table 96. stm32l072xx ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 table 97. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 list of figures stm32l072xx 8/147 docid027100 rev 3 list of figures figure 1. stm32l072xx block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 2. clock tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 3. stm32l072xx lqfp100 pinout - 14 x 14 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 figure 4. stm32l072xx ufbga100 ballout - 7x 7 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 figure 5. stm32l072xx lqfp64 pinout - 10 x 10 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 figure 6. stm32l072xx ufbga64/tfbga64 ballout - 5x 5 mm . . . . . . . . . . . . . . . . . . . . . . . . . . 40 figure 7. stm32l072xx wlcsp49 ballout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 figure 8. stm32l072xx lqfp48 pinout - 7 x 7 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 figure 9. stm32l072xx lqfp32 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 figure 10. stm32l072xx ufqfpn32 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 figure 11. memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 figure 12. pin loading conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 figure 13. pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 figure 14. power supply scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 figure 15. current consumption measurement scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 figure 16. idd vs vdd, at ta= 25/55/85 /105 c, run mode, code running from ? flash memory, range 2, hse, 1ws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 figure 17. idd vs vdd, at ta= 25/55/85 /105 c, run mode, code running from ? flash memory, range 2, hsi16, 1ws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 figure 18. idd vs vdd, at ta= 25 c, low-power run mode, code running ? from ram, range 3, msi (range 0) at 64 khz, 0 ws . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 figure 19. idd vs vdd, at ta= 25/55/ 85/105/125 c, stop mode with rtc enabled ? and running on lse low drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 figure 20. idd vs vdd, at ta= 25/55/85/ 105/125 c, stop mode with rtc disabled, ? all clocks off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 figure 21. high-speed external clock source ac timing diagra m . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 figure 22. low-speed external clock source ac timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 figure 23. hse oscillator circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 figure 24. typical application with a 32.768 khz crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 figure 25. hsi16 minimum and maximum value versus temperat ure . . . . . . . . . . . . . . . . . . . . . . . . . 84 figure 26. vih/vil versus vdd (cmos i/os) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 figure 27. vih/vil versus vdd (ttl i/os) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 figure 28. i/o ac characteristics definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 figure 29. recommended nrst pin protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 figure 30. adc accuracy characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 figure 31. typical connection diagram using the adc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 figure 32. power supply and reference decoupling (v ref+ not connected to v dda ). . . . . . . . . . . . . 102 figure 33. power supply and reference decoupling (v ref+ connected to v dda ). . . . . . . . . . . . . . . . 103 figure 34. 12-bit buffered/non-buffered dac. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 figure 35. spi timing diagram - slave mode and cpha = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 figure 36. spi timing diagram - slave mode and cpha = 1 (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 figure 37. spi timing diagram - master mode (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 figure 38. i 2 s slave timing diagram (philips protocol) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 figure 39. i 2 s master timing diag ram (philips protocol) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 figure 40. usb timings: definition of data signal rise and fall time . . . . . . . . . . . . . . . . . . . . . . . . . . 117 figure 41. lqfp100 - 100-pin, 14 x 14 mm low-profile quad flat package outline . . . . . . . . . . . . . . 118 figure 42. lqfp100 - 100-pin, 14 x 14 mm low-profile quad flat ? recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 docid027100 rev 3 9/147 stm32l072xx list of figures 9 figure 43. ufbga100 - 100-pin, 7 x 7 mm, 0.50 mm pitch, ultra fine pitch ball ? grid array package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 figure 44. ufbga100 - 100-pin, 7 x 7 mm, 0.50 mm pitch, ultra fine pitch ball ? grid array package recommended footpr int . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 figure 45. lqfp64 - 64-pin, 10 x 10 mm low-profile quad flat package outline . . . . . . . . . . . . . . . . 123 figure 46. lqfp64 - 64-pin, 10 x 10 mm low-profile quad flat recommended footprint . . . . . . . . . . 124 figure 47. lqfp64 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 figure 48. ufbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch ultra profile fine pitch ? ball grid array package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 figure 49. ufbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch ultra profile fine pitch ? ball grid array package recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 figure 50. ufbga64 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 figure 51. tfbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch thin profile fine pitch ball ? grid array package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 figure 52. tfbga64 ? 64-ball, 5 x 5 mm, 0.5 mm pitch, thin profile fine pitch ball ? ,grid array recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 figure 53. tfbga64 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 figure 54. wlcsp49 - 49-pin, 3.294 x 3.258 mm, 0.4 mm pitch wafer level chip scale ? package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 figure 55. wlcsp49 - 49-pin, 3.294 x 3.258 mm, 0.4 mm pitch wafer level chip scale ? recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 figure 56. wlcsp49 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 figure 57. lqfp48 - 48-pin, 7 x 7 mm low-profile quad flat package outline . . . . . . . . . . . . . . . . . . 135 figure 58. lqfp48 - 48-pin, 7 x 7 mm low-profile quad flat recommended footprint . . . . . . . . . . . . 137 figure 59. lqfp32 - 32-pin, 7 x 7 mm low-profile quad flat package outline . . . . . . . . . . . . . . . . . . 138 figure 60. lqfp32 - 32-pin, 7 x 7 mm low-profile quad flat recommended footprint . . . . . . . . . . . . 139 figure 61. ufqfpn32 - 32-pin, 5x5 mm, 0.5 mm pitch ultra thin fine pitch quad flat ? package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 figure 62. ufqfpn32 - 32-pin, 5x5 mm, 0.5 mm pitch ultra thin fine pitch quad flat ? recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 figure 63. thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 introduction stm32l072xx 10/147 docid027100 rev 3 1 introduction the ultra-low-power stm32l072xx are offered in 9 different package typesfrom 32 pins to 100 pins. depending on the device chosen, diff erent sets of peripherals are included, the description below gives an overview of the complete range of peripherals proposed in this family. these features make the ultra-low-power stm32l072xx microcontrollers suitable for a wide range of applications: ? gas/water meters and industrial sensors ? healthcare and fitness equipment ? remote control and user interface ? pc peripherals, gaming, gps equipment ? alarm system, wired and wireless sensors, video intercom this stm32l072xx datasheet should be read in conjunction with the stm32l0x2xx reference manual (rm0376) . for information on the arm ? cortex ? -m0+ core please refer to the cortex ? -m0+ technical reference manual, available from the www.arm.com website. figure 1 shows the general block diagram of the device family. docid027100 rev 3 11/147 stm32l072xx description 36 2 description the ultra-low-power stm32l072xx microcontrolle rs incorporate the connectivity power of the universal serial bus (usb 2.0 crystal-less) with the high-performance arm ? cortex ? - m0+ 32-bit risc core operating at a 32 mhz frequency, a memory protection unit (mpu), high-speed embedded memories (up to 192 kbytes of flash program memory, 6 kbytes of data eeprom and 20 kbytes of ram) plus an extensive range of enhanced i/os and peripherals. the stm32l072xx devices provide high power efficiency for a wide range of performance. it is achieved with a large choice of internal and external clock sources, an internal voltage adaptation and several low-power modes. the stm32l072xx devices offer several analog features, one 12-bit adc with hardware oversampling, two dacs, two ultra-low-power comparators, several timers, one low-power timer (lptim), four general-purpose 16-bit timers and two basic timer, one rtc and one systick which can be used as timebases. they also feature two watchdogs, one watchdog with independent clock and window capability and one window watchdog based on bus clock. moreover, the stm32l072xx devices embed standard and advanced communication interfaces: up to three i2cs, two spis, one i2s, four usarts, a low-power uart (lpuart), and a crystal-less usb. the devices offer up to 24 capacitive sensing channels to simply add touch sensing functionality to any application. the stm32l072xx also include a real-time clock and a set of backup registers that remain powered in standby mode. the ultra-low-power stm32l072xx devices operat e from a 1.8 to 3.6 v power supply (down to 1.65 v at power down) with bor and from a 1.65 to 3.6 v power supply without bor option. they are available in the -40 to +125 c temperature range. a comprehensive set of power-saving modes allows the design of low-power applications. description stm32l072xx 12/147 docid027100 rev 3 2.1 device overview table 2. ultra-low-power stm32l072xx de vice features and peripheral counts peripheral stm32l07 2v8 stm32l07 2kb stm32l07 2cb stm32l07 2vb stm32l07 2rb stm32l07 2kz stm32l07 2cz stm32l07 2vz stm32l07 2rz flash (kbytes) 64 kbytes 128 kbytes 192 kbytes data eeprom (kbytes) 3 kbytes 6 kbytes ram (kbytes) 20 kbytes timers general- purpose 4 basic 2 lptimer 1 rtc/systick/iwdg/ ? wwdg 1/1/1/1 com. interfaces spi/i2s 6(4) (1) /1 4(3) (2) /0 6(4) (1) /1 4(3) (2) /0 6(4) (1) /1 i 2 c 32 3 2 3 usart 4 3434 lpuart 1 usb ? /(vdd_usb) 1/(1) 1/(0) (3) 1/(1) 1/(0) (3) 1/(1) gpios 84 25 (3) 40 (4) 84 51 (5) 25 (3) 40 (4) 84 51 (5) clocks: hse/lse/hsi/msi/lsi 1/1/1/1/1 12-bit synchronized adc ? number of channels 1 16 1 10 1 13 (4) 1 16 1 16 (5) 1 10 1 13 (4) 1 16 1 16 (5) 12-bit dac ? number of channels 2 2 comparators 2 capacitive sensing channels 24 13 (3) 19 (4) 24 24 (5) 13 (3) 19 (4) 24 24 (5) max. cpu frequency 32 mhz operating voltage 1.8 v to 3.6 v (down to 1.65 v at power-down) with bor option 1.65 to 3.6 v without bor option operating temperatures ambient temperature: ?40 to +125 c junction temperature: ?40 to +130 c packages lqfp100 ufbga100 ufqfpn32 lqfp32 lqfp48 wlcsp49 lqfp100 ufbga100 lqfp64 tfbga64 ufqfpn32 lqfp32 lqfp48 wlcsp49 lqfp100 ufbga100 lqfp64 tfbga64 ufbga64 1. 4 spi interfaces are usarts operating in spi master mode. 2. 3 spi interfaces are usarts operating in spi master mode. 3. ufqfp32 has 2 gpios and 1 capacitive sensing channel less that lqfp32.however, ufqfp32 features a vdd_usb pin while lqpf32 do es not. 4. lqfp48 has three gpios, three adc channels and tw o capacitive sensing channel less than wlcsp49. 5. tfbga64 has one gpio, one adc input and one capacitive sensing chann el less than lqfp64. docid027100 rev 3 13/147 stm32l072xx description 36 figure 1. stm32l072xx block diagram & |