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freescale semiconductor, inc. user?s guide ? 2015 freescale semiconductor, inc. all rights rese rved. 1 about this guide this user?s guide describes the freescale frdm-cr20 a development board. the frdm-cr20a is a 2.4 ghz industrial, scientific, and medical (ism) intended for the ieee? 802.15.4 standard, including thread and ipv6/6lowpan protocols. the frdm-cr20a contains the mcr20a transceiver that is typically combined with a software stack and a freescale kinetis mcu to imple ment an ieee 802.15.4 standard platform solutions. 1.1 audience this manual is intended for system designers. 2 safety information 2.1 fcc guidelines this equipment is for use by developers for evaluat ion purposes only and must not be incorporated into any other device or system. this device may not be sold to th e general public. integrators will be responsible for reevalu ating the end product (including the transmitter) and obtaini ng a separate fcc authorization. document number: FRDMCR20AUG rev. 0, 04/2015 contents 1. about this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1. audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.1. fcc guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.2. regulatory approval for canada (ic rss 210) . . . . . 2 2.3. electrostatic discharge considerations . . . . . . . . . . . . 3 2.4. disposal instructions . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. mcr20a transceiver overview and description . . . . 3 3.1. introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2. board features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3. software and driver considerations . . . . . . . . . . . . . . 5 4. frdm-cr20a development board . . . . . . . . . . . . . . 5 4.1. frdm-cr20a board overview . . . . . . . . . . . . . . . . . 5 4.2. functional description . . . . . . . . . . . . . . . . . . . . . . . . 9 4.3. schematic, board layout, and bill of material . . . . . . 15 5. pcb manufacturing specifications . . . . . . . . . . . . . . 20 5.1. single pcb construction . . . . . . . . . . . . . . . . . . . . . 21 5.2. panelization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.3. materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.4. solder mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.5. silk screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.6. electrical pcb testing . . . . . . . . . . . . . . . . . . . . . . . 23 5.7. packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.8. hole specification/tool table . . . . . . . . . . . . . . . . . . . 23 5.9. file description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6. revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 freescale freedom development board frdm-cr20a user's guide
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 2 freescale semiconductor, inc. safety information fcc approval of this device only covers the origina l configuration of this device as supplied. any modifications to this product, including changes sh own in this manual, may violate the rules of the fe deral communications commission and industry canada and m ake operation of the product unlawful. 2.1.1 labeling fcc labels are physically located on the back of th e board. 2.1.2 operating conditions this device complies with part 15 of the fcc rules. operation is subject to the following two conditio ns: ? this device may not cause harmful interference. ? this device must accept any interference received, including interference that may cause undesired operation. 2.1.3 exposure limits this equipment complies with fcc radiation exposure limits set forth for an uncontrolled environment. the antenna(s) used for this equipment must be inst alled to provide a separation distance of at least 8 inches (20cm) from all persons. 2.1.4 antenna restrictions an intentional radiator is designed to ensure that no antenna other than that furnished by the respons ible party is used with the device. the use of a permane ntly attached antenna or of an antenna that uses a unique coupling to the intentional radiator is considered sufficient to comply with the provisions of this se ction. the manufacturer may design the unit so that a brok en antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited. this requirement does not apply to carr ier current devices or to devices operated under the pr ovisions of sections 15.211, 15.213, 15.217, 15.219 , or 15.221 of the ieee 802.15.4 standard. further, this requirement does not apply to intentional radiator s that must be professionally installed, such as perimeter protection systems and some field disturbance sens ors, or to other intentional radiators which, in accorda nce with section 15.31(d), must be measured at the installation site. however, the installer is respon sible for ensuring that the proper antenna is emplo yed so that the limits in this part are not exceeded. 2.2 regulatory approval for canada (ic rss 210) this equipment complies with industry canada liscen ce-exempt rss standard(s). operation is subject to the following two conditions: 1. this board may not cause interference, and 2. this board must accept any interference, includin g interference that may cause undesired operation of the device.
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 3 mcr20a transceiver overview and description 2.2.1 26 part 5 ? appendix le prsent appareil est conforme aux cnr d'industri e canada applicables aux appareils radio exempts de licence. l'exploitation est autorise aux deux cond itions suivantes: 1. l'appareil ne doit pas produire de brouillage, et 2. l'utilisateur de l'appareil doit accepter tout br ouillage radiolectrique subi, mme si le brouillag e est susceptible d'en compromettre le fonctionnement . 2.3 electrostatic discharge considerations although damage from electrostatic discharge (esd) is much less common on these devices than on early cmos circuits, normal handling precautions should b e used to avoid exposure to static discharge. qualification tests are performed to ensure that th ese devices can withstand exposure to reasonable le vels of static without suffering any permanent damage. all esd testing is in conformity with the jesd22 st ress test qualification for commercial grade integrated circuits. during the device qualificatio n esd stresses were performed for the human body model (hbm), the machine model (mm) and the charge device model (cdm). all latch-up test testing is in conformity with the jesd78 ic latch-up test. when operating or handling the development boards o r components, freescale strongly recommends using at least the grounding wrist straps plus any or all of the following esd dissipation methods: ? flexible fabric, solid fixed size, or disposable e sd wrist straps ? static control workstations, static control monito rs and table or floor static control systems ? static control packaging and transportation materi als and environmental systems 2.4 disposal instructions this product may be subject to special disposal req uirements. for product disposal instructions, refer to freescale.com/productdisposal . 3 mcr20a transceiver overview and description 3.1 introduction the frdm-cr20a development board is an evaluation e nvironment to support the freescale mcr20avhm soc transceiver (mcr20a), a 2.4 ghz indus trial, scientific, and medical (ism) transceiver intended for the ieee 802.15.4 standard . the mcr20a is a highly-integrated, cost-effective r adio transceiver operating in the 2.36 ghz to 2.48 ghz range, usually combined with a software stack a nd a freescale kinetis mcu to implement an ieee 802.15.4 standard platform solution. freescale supplements the mcr20a transceiver with t ools and software that include hardware evaluation and development boards, software development ide an d applications, drivers, custom phy usable with the freescale ieee 802.15.4 compatible mac.
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 4 freescale semiconductor, inc. mcr20a transceiver overview and description the frdm-cr20a development board consists of one bo ard that contains the mcr20a device with a 32 mhz reference oscillator crystal, rf circuitry incl uding an antenna, and supporting circuitry to be mounted into the popular freescale freedom developm ent board form factor. the board is not a standalon e product; it requires an external mcu to support app lications development, via spi connection. 3.2 board features 3.2.1 frdm-cr20a board the frdm-cr20a development board can be plugged-int o the freescale freedom development platform as a shield. it contains the mcr20avhm device and a ll necessary i/o connections to connect with the freedom system. figure 1 shows the frdm-cr20a development board. figure 1. frdm-cr20a the frdm-cr20a development board includes the follo wing features: ? the freescale ultra-low-power mcr20avhm 802.15.4 t ransceiver ? full ieee 802.15.4 compliant wireless node ? reference design area with small footprint, low co st rf node ? rf circuitry includes a balun to convert the diffe rential input/output pin of the mcr20 to single-ended for on-board signal routing ? low off-chip component count ? programmable output power from ?35 dbm to +8 dbm a t the sma connector, no trap ? receiver sensitivity: ?102 dbm, typical (@1% per f or 20 byte payload packet) ? integrated pcb inverted f-type antenna and footpri nt for sma rf port
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 5 frdm-cr20a development board ? 32 mhz reference oscillator ? 2.4 ghz frequency operation (ism band) ? 1 rgb led indicator driven by external mcu ? 2 push button switches driven by external mcu ? 1 reset button driven by xcvr or external mcu ? power translator for gpios, freescale mcu support 3.3v or external sources such as arduino 5v ? bit stream mode (bsm) to monitor packet data with synchronization clock ? low-power operating modes with single spi command device wake-up (spi communication is enabled in lp mode ? provides access to the mcr20avhm set of gpios figure 2 shows the main board features and input/output hea ders for the freescale frdm-cr20a board. figure 2. frdm-cr20a callouts and i/o headers 3.3 software and driver considerations no special software required. this is not a standal one board; an external mcu is required for enableme nt. 4 frdm-cr20a development board 4.1 frdm-cr20a board overview the frdm-cr20a is an evaluation board based on the freescale mcr20a transceiver. the frdm-cr20a provides a platform to evaluate the mcr2 0a transceiver, and develop software and
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 6 freescale semiconductor, inc. frdm-cr20a development board applications. the device is accompanied by a 32 mhz reference oscillator crystal, rf circuitry includi ng antenna, and supporting circuitry. the frdm-cr20a board is intended as the core pcb fo r mcr20a device evaluation and application development, and can be used as daughter card to ot her development boards within the freescale freedom development platform, as an application specific su ch as a shield card. 4.1.1 pcb features the frdm-cr20a board provides the following feature s: ? the freescale freedom development platform form fa ctor ? two-layer metal, 0.062-inch thick fr4 board ? lga footprint ? printed metal f-antenna and footprint to add an sm a connector ? 32 mhz reference oscillator crystal ? standard freescale freedom daughter card mounting interface (shield) ? power level translators to support multiple voltag es inputs 4.1.2 form factor figure 3 shows the frdm-cr20a connector and header location s. figure 3. frdm-cr20a
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 7 frdm-cr20a development board figure 3 also shows a footprint of the frdm-cr20a with the location of the io headers. the following list gives these details: ? j1, j2, j3 and j4: ? headers have standard 0.1 in / 2.54 mm pin spacing ? j2 is 10-pin ? j1 and j3 are 8-pin ? j4 is 6-pin ? pin headers mounted on the top side of the frdm-cr 20a board and are intended to plug into matching receptacles on the freescale freedom platf orm board. ? j6: ? header has standard 0.1 in / 2.54 mm pin spacing ? j6 is a 1x2 pin, with a cut-trace on bottom side ? pin headers mounted on the top side of the frdm-cr 20a and is intended to isolate for a ic current measurements. ? j7: ? header has standard 0.1 in / 2.54 mm pin spacing ? j7 is 1x3 pin ? pin headers mounted on the top side of the frdm-cr 20a board and intended to select the reset target main mcu or transceiver. figure 4. frdm-cr20a top side (component side) footp rint
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 8 freescale semiconductor, inc. frdm-cr20a development board 4.1.3 board level specifications table 1. frdm-cr20a board specifications parameter min typ max units notes/conditions general size (pcb: x, y) 81.2 x 53.3 3.20 x 2.10 mm inches layer build (pcb) 1.57 0.062 mm inches two-layer dielectric material (pcb) fr4 temperature operating temperature (see note) -40 +25 +70 c operating temperature is limited to +70 c due to switches. basic circuit is good for a maximum temperature of +85 c. storage temperature -30 +25 +70 c rf 802.15.4 frequency range 2405 2480 mhz all 16 channels in the 2450 mhz band operation frequency 2360 2480 mhz rf receiver saturation (maximum input level) +0 dbm refer to data sheet sensitivity for 1% packet error rate (per) (+25 c) 802.15.4 -102 dbm refer to data sheet rf transmitter rf power output -35 +8 dbm programmable in steps. at t he antenna feed with no trap. 1 2nd harmonic <-50 <-40 dbm refer to data sheet 3rd harmonic <-50 <-40 dbm refer to data sheet regulatory approval fcc product is approved according to the fcc part 15 standard ce (etsi) product is approved according to the en 300 328 v1.7.1 (2006-10) standard ce (emc) product is approved according to the en 301 489-1 v1.6.1 (2005-09) and en 301 489-17 v1.2.1 (2002-08) standards safety ul product is approved according to the iec 60950-1 and en 60950-1, first edition standards
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 9 frdm-cr20a development board 4.2 functional description the frdm-cr20a is built around the freescale frdm-c r20a transceiver with a 32-pin lga package. this board is intended as a simple evaluation platf orm and as a building block for application develop ment. the two-layer board provides the mcr20a transceiver with the required rf circuitry and 32 mhz reference oscillator crystal. the layout for this b ase level functionality can be used as a reference layout for the user?s target board. figure 5 shows a simple block diagram. figure 5. frdm-cr20a block diagram 4.2.1 rf performance and considerations the frdm-cr20a development board includes the frees cale mcr20 2.4 ghz transceiver. key specifications for the frdm-cr20a development board are: ? programmable output power from ?35 dbm to +8 dbm a t the sma, no trap ? typical sensitivity is -102 dbm (@1% per for 20 by te payload packet) environment rohs product complies with the eu directive 2002/95/ec of 27 january 2003 weee product complies with the eu directive 2002/95/ec of 27 january 2003 1 trap will add 1 to 2 db of loss. table 1. frdm-cr20a board specifications (continued) parameter min typ max units notes/conditions
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 10 freescale semiconductor, inc. frdm-cr20a development board ? frequency range is 2360 to 2480 mhz ? the mcr20 transceiver features an integrated trans mit/receive switch to its differential bidirectional rf input/output pin ? board features a low component count rf matching n etwork with off-chip 1:1 balun ? ?f? printed metal antenna for a small footprint, l ow-cost design the layout has provision for out-of-band signal sup pression (components l1 and c5) if required. figure 6 shows the typical topology for the rf circuitry. a footprint is available to install rf connector j5 f or measurement purposes. when using j5, c1 should be i nstalled and c4 removed. figure 6. frdm-cr20a rf circuitry 4.2.2 clocks the frdm-cr20a provides two clocks: ? 32 mhz reference oscillator - figure 7 shows the external 32 mhz external crystal y1. thi s mounted crystal must meet the specifications outlin ed in the an3251 application note. the ieee 802.15.4 standard requires that the frequency be ac curate to less that +/-40 ppm. ? at 25c, it is desired to have the frequency accur ate to +/-10 ppm or less to allow for temperature variation. ? capacitors c16 and c17 provide the bulk of the cry stal load capacitance. ? to measure the 32 mhz oscillator frequency, signal clkout (pin-16) can optionally be configured to provide a buffered output clock signa l.
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 11 frdm-cr20a development board figure 7. frdm-cr20a 32 mhz reference oscillator cir cuit 4.2.3 power management the frdm-cr20a development board must be powered th rough the edge connectors from the freescale freedom development platform board that it is plugg ed into. the frdm-cr20a power management circuit is shown in figure 8 . figure 8. frdm-cr20a power management circuit the two-pin header j6 provides the means to supply current to various board components and current measurements if desired. the red led marked as led1 is available as a power indicator. the power header/0 ohm resistor provides the means to supply either the ic or board circuits. current measuremen ts can be made by inserting a current meter in place o f a designated jumper. connections configurations a re described in table 2 . table 2. power distribution headers supply designation header pins description p3v3_brd r4 1 - 2 supply voltage to leds ? normally jumpered ? jumper used to enable leds, sw?s and level transl ator on board ? leave open for lowest power ? usage: measure board current p3v3_ic j6 1 - 2 supply voltage to mcr20a ? normally jumpered ? supplies the mcr20a tranceiver ? usage: measure or supply radio current
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 12 freescale semiconductor, inc. frdm-cr20a development board 4.2.4 frdm-cr20a peripheral functions the frdm-cr20a development board includes the frees cale freedom board headers enabling interface to general purpose functions to assist with to assi st with application implementations. the frdm-cr20a board also has alternate port functions routed to t hose interface headers where off-board freescale freedom development platform peripherals can be use d if desired. 4.2.4.1 rgb led the led feature includes an rgb (red, green, blue) led. the rgb led is driven by the mcu on another board and not the transceiver, and therefor e can be used with any application. figure 9 shows the rgb circuit, the rgb led circuity offers the follow ing features: ? rgb power supply is p3v3_brd ? gpio driven, externally by j4 header, j4-4 blue, j 4-5 green, j4-6 red ? optionally a 0 ohm resistor can be populated (r22- r24) and be driven by gpio6 - 8 of the transceiver figure 9. rgb led feature 4.2.4.2 push buttons push buttons can be used by the application to trig ger events and are normally driven by an external m cu or transceiver ic. figure 10 shows the push buttons circuit implementation. ? no power supply is required, however a pull-up cir cuit is feasible. ? connected to the d4 and d3 signals of connector j1 for interface to off-board circuitry.
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 13 frdm-cr20a development board figure 10. push buttons 4.2.4.3 level translator the on-board level translator, u2, is used as a lev el shifter is useful when use with the arduino syst em. it provides the voltage translation from the arduino 5 v system to the freescale mcu plus transceiver 3.3v system. the level translator is supplied by the vcc _3v3 source. figure 11 shows the translator circuit. figure 11. txb0108 level translators 4.2.4.4 interface connectors j1, j2, j3 and j4 the four connectors j1, j2, j3 and j4 are 100 mil p in headers mounted on the top (component side) supporting the fdrm standard connector. ? voltage rails vcc_3v3, vcc_5v and v_in(5-9v) are r outed via header j3 ? to avoid damage, the exact same voltage should sup ply peripherals on the frdm-cr20a that interface to the freescale freedom board supply, ex cept where the level translator (u2) is used. the pin definitions for the headers are shown in table 3 and table 4 respectively.
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 14 freescale semiconductor, inc. frdm-cr20a development board table 3. j1 & j2 connector j1 j2 header pin number board pin name description header pin number board pin name description 1 gpio1 (d0/rx/int) 1 gpio4 (d8/int) 2 gpio2 (d1/tx/int) 2 gpio5 (d9/int) 3 irq_b (d2/int) 3 spi_ss (d10/spi_ss) 4 sw2 (d3/pwm/int) 4 spi_mosi (d11/mosi) 5 sw1 (d4/int) 5 spi_miso (d12/miso) 6 rst (d5/pwm/int) 6 spi_clk (d13/sck) 7 rx_switch (d6/pwm/int) 7 gnd vss (gnd)board ground 8 gpio3 (d7/cmp/int) 8 nc vref (nc) 9 gpio6 (d14/ana/int) 10 clk_out (d15/ana/int) table 4. j3 & j4 connector j3 j4 header pin number board pin name description header pin number board pin name description 1 nc nc 1 vdd_regd a0 2 io_ref frdm-xxxxx = 3v3 arduino uno = 5v 2 p3v3_ic a1 3 cpu_rstb reset external mcu 3 vdd_rf/vdd_if/vdd _pa a2 4 vcc_3v3 3v3 v_in 4 rgb_blue a3 5 vcc_5v 5v v_in 5 rgb_green a4 6 gnd gnd 6 rgb_red a5 7 gnd gnd 8 v_in 5v - 9v unregulated voltage
4.3 schematic, board layout, and bill of material figure 12. frdm-cr20a schematic revb 5 5 4 4 3 3 2 2 1 1 d d c c b b a a harmonic trap

cad note:sma - f-antenna: place both capacitor sharing pin 1 100 ohm controlled impedance from dut to balun. 50 ohm controlled impedence line from balun to sma and f_antenna cad note:embed pads into 50 ohm line. cad note:open solder mask bottom below f-antenna on "feedpoint" via cad note:miso/mosi poka-yoke: place both resistors with the same orientation and provide same airgap between miso to mosi resistors terminals in a square fashion. note:gpio signals come up (unbuffered) from the host board, from arduino is 5v from frdm is 3.3v note:gpio signals come up (unbuffered) from the host board, from arduino is 5v from frdm is 3.3v note:on arduino uno, io_ref is 5v on frdm-xxxxx, io_ref is 3.3v cad note:r20 closed to ic to reduce the circuit trace parasitic note:place componentes to filtered powers for host monitoring forces reset down,1 - 2 xcvr 2 - 3 arduino/frdm host board shorting header on bottom layer jumper is shorted by a cut-trace on bottom layer. cutting the trace will effectively isolate for a ic current measureme nts
default confing 1-2 rf_50 z_cap rf_50 rf_sma rf_n z_rf_n rf_p z_rf_p gpio1 gpio2 gpio6 gpio7 gpio8 rx_switch tx_switch ant_a ant_b clk_out r_mosi spi:clk gpio4 r_miso spi:ss irq_b gpio3 gpio5 vdd_rf/vdd_if/vdd_pa vdd_rf/vdd_if/vdd_pa vdd_regd vdd_rf/vdd_if/vdd_pa d3/pwm/int d4/int rgb_blue rgb_red ledrgb_green ledrgb_blue ledrgb_red rgb_green vdd_regd vdd_rf/vdd_if/vdd_pa xtal_32m extal_32m rf_ant spi:mosi spi:miso d0/int/tx gpio1 d1/int/rx d2/int d3/pwm/int d4/int d5/pwm/int d6/pwm/int d7/cmp/int d8/int d9/int d10/spi_ss d11/mosi d12/miso d13/sck d14/ana/int gpio6 d15/ana/int a1 a0 a2 gpio2 gpio3 gpio4 gpio5 cpu_rstb vdd_rf/vdd_if/vdd_pa p3v3_ic vdd_regd cpu_rstb rst_b_xcvr d5/pwm/int d2/int d6/pwm/int rts rst_b_xcvr irq_b irq rx_sw rx_switch d13/sck d12/miso d11/mosi d10/spi_ss clk spi:clk miso spi:miso mosi spi:mosi spi:ss ss xtal_32m extal_32m rst_b_xcvr clk_out d15/ana/int rgb_blue a3 rgb_green a4 rgb_red a5 rgb_blue rgb_green rgb_red gpio7 gpio8 gpio6 p3v3_brd p3v3_brd p3v3_brd p3v3_brd p3v3_ic vcc_3v3 vcc_5v io_ref v_in p3v3_brd vcc_3v3 io_ref vcc_3v3 p3v3_ic p3v3_brd vcc_3v3 io_ref vcc_5v vcc_3v3 v_in drawing title: size document number rev date: sheet of page title: icap classification: fcp: fiuo: pubi: sch-28535 pdf: spf28535 b frdm-mcr20a c wednesday, november 19, 2014 frdm-mcr20a shield 3 3 ___ ___ x drawing title: size document number rev date: sheet of page title: icap classification: fcp: fiuo: pubi: sch-28535 pdf: spf28535 b frdm-mcr20a c wednesday, november 19, 2014 frdm-mcr20a shield 3 3 ___ ___ x drawing title: size document number rev date: sheet of page title: icap classification: fcp: fiuo: pubi: sch-28535 pdf: spf28535 b frdm-mcr20a c wednesday, november 19, 2014 frdm-mcr20a shield 3 3 ___ ___ x j6 hdr 1x2 th dnp 1 2 r20 0 c11 0.33uf l3 10nh dnp 1 2 r11 220 sh6 0 sh10 0 z1 2400mhz 50ohm 5 1 6 2 3 4 c9 0.47uf ant1 f_antenna j2 skt_1x10 1 2 3 4 5 6 7 8 9 10 y1 32mhz 1 4 3 2 c1 10pf dnp l1 4.3nh dnp 1 2 l2 10nh dnp 1 2 tp10 r1 0 1 j5 sma dnp tp15 tp8 c16 11pf tp19 tp22 dnp r4 0 c23 10uf dnp l6 10nh dnp 1 2 l5 10nh dnp 1 2 r18 0 dnp sw1 tl1015af160qg 1 2 sh4 0 sw3 tl1015af160qg 1 2 tp20 sh7 0 tp9 r16 0 dnp tp27 r24 0 dnp c18 1000pf dnp sh1 0 tp26 u1 mcr20a gpio1 5 gpio2 6 gpio3 7 gpio4 8 gpio5 9 gpio6 19 gpio7 20 gpio8 21 rst 10 r_miso 11 r_mosi 12 r_sclk 13 r_ssel 14 irq 15 clk_out 16 ant_a 23 ant_b 24 rx_switch 25 tx_switch 26 rf_outp 28 extal_32m 4 rf_outn 29 xtal_32m 3 vssa_pa2 30 vdd_rf 1 vdd_pa/vdd_pa2 31 vdd_if 32 vdd_regd 17 vbat 2 vbat2 18 vssa_pa 27 vss_pa3 34 vss_rf 33 vss_rf2 35 dtm0 22 dtm1 36 dtm2 37 dtm3 38 dtm4 39 dtm5 40 dtm6 41 s1 bmi-s-103 dnp 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 sh5 0 tp18 led1 red a c tp4 c10 33pf tp2 c4 10pf r23 0 dnp j3 skt_1x8 1 2 3 4 5 6 7 8 tp13 c20 1000pf r7 10.0k dnp c8 0.1uf tp23 dnp r5 220 tp21 dnp sh3 0 tp11 r13 0 c2 1pf j7 hdr th 1x3 1 2 3 c7 1000pf tp6 r22 0 dnp c25 10uf dnp r12 220 led2 clv1a-fkb-cj1m1f1bb7r4s3 1 2 3 4 c5 1.2pf dnp c19 1000pf dnp r21 0 dnp r2 0 u2 txb0108 vcca 2 a1 1 a2 3 a3 4 a4 5 gnd 11 oe 10 b4 16 b3 17 b2 18 b1 20 vccb 19 a5 6 a6 7 a7 8 a8 9 b8 12 b7 13 b6 14 b5 15 j1 skt_1x8 1 2 3 4 5 6 7 8 r14 0 c3 10pf tp1 l7 10nh dnp 1 2 l4 10nh dnp 1 2 c13 10uf r6 10.0k dnp c17 11pf r19 0 dnp tp7 c21 0.1uf r17 0 dnp r10 220 tp24 dnp tp3 r15 0 dnp sh2 0 c26 0.1uf r8 10.0k dnp c6 5pf tp12 c14 2.2uf tp16 c24 10uf dnp tp25 dnp tp17 tp5 j4 skt_1x6 1 2 3 4 5 6 sh9 0 sw2 tl1015af160qg 1 2 sh8 0 c12 33pf
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 16 freescale semiconductor, inc. frdm-cr20a development board figure 13. frdm-cr20a reference board pcb component location (top view) figure 14. frdm-cr20a reference board pcb test point s
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 17 frdm-cr20a development board figure 15. frdm-cr20a reference board pcb layout (to p view) figure 16. frdm-cr20a reference board pcb layout (bo ttom view)
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 18 freescale semiconductor, inc. frdm-cr20a development board 4.3.1 bill of materials table 5. bill of materials (common parts for all fre quency bands) (sheet 1 of 3) item qty reference value description mfg. name mfg. part number 1 1 ant1 f_antenna pcb f antenna, no part order 2 1 c1 10pf cap cer 10pf 50v 5% c0g 0402 avx 04025a100jat 2a 3 1 c2 1pf cap cer 1pf 50v 5% c0g 0402 murata grm1555c1h1 r0ca 01b 4 2 c3,c4 10pf cap cer 10pf 50v 5% c0g 0402 avx 04025a100 jat2a 5 1 c5 dnp 1.2pf cap cer 1.2pf 50v 21% c0g 0402 kemet c0402c129c5gac 6 1 c6 5pf cap cer 5pf 50v 5% c0g 0402 murata gjm1555c1h5 r0cb0 1d 7 2 c7,c20 1000pf cap cer 1000pf 50v 5% c0g 0402 murata grm1555c1h102ja0 1d 8 3 c8,c21,c2 6 0.1uf cap cer 0.1uf 16v 10% x7r 0402 kemet c0402c104k4rac 9 1 c9 0.47uf cap cer 0.47uf 6.3v 10% x5r 0402 murata grm155r60j474ke1 9d 10 2 c10,c12 33pf cap cer 33pf 50v 5% c0g 0402 venkel co mpany c0402c0g500-330jn e 11 1 c11 0.33uf cap cer 0.33uf 6.3v 10% x5r 0402 murata grm155r60j334ke0 1d 12 1 c13 10uf cap cer 10uf 10v 20% x5r 0603 taiyo yuden lmk107bj106maltd 13 1 c14 2.2uf cap cer 2.2uf 10v 10% x7r 0603 taiyo yuden lmk107b7225ka-t 14 2 c16,c17 11pf cap cer 11pf 50v 1% c0g 0402 avx 04025u 110fat2a 15 2 c18,c19 dnp 1000pf cap cer 1000pf 50v 5% c0g 0402 murata grm1555c1h102ja0 1d 16 3 c23,c24,c 25 dnp 10uf cap cer 10uf 6.3v 20% x5r 0402 tdk c1005x5r0j106m050 bc 17 2 j1,j3 skt_1x8 con 1x8 skt th 100mil sp 340h au 394l samtec ssq-108-03-f-s 18 1 j2 skt_1x10 con 1x10 skt th 100mil sp 340h au 394l samtec ssq-110-03-f-s 19 1 j4 skt_1x6 con 1x6 skt th 100mil sp 340h au 394l samtec ssq-106-03-f-s 20 1 j5 dnp sma con, sma, edge 0.062in, 50 ohm female 18ghz emerson network power connectivity solutions, inc 142-0701-851
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 19 frdm-cr20a development board 21 1 j6 dnp hdr 1x2 th hdr 1x2 th 100mil sp 339h au 98l samtec tsw-102-07-g-s 22 1 j7 hdr th 1x3 hdr 1x3 th 100mil sp 339h au 100l samtec tsw-103-07-g-s 23 1 led1 red led red clear sgl 30ma smt 0805 lite on ltst-c171krkt 24 1 led2 clv1a-fkb -cj1m1f1b b7r4s3 led red bl grn sgl 50/25/25ma smt cree, inc clv1a-fkb-cj1m1f1 bb7r4s3 25 1 l1 dnp 4.3nh ind -- 4.3nh@500mhz 160ma 2% 0402 murata lqp15mn4n3b02 26 6 l2,l3,l4,l 5,l6,l7 dnp 10nh ind -- 0.010uh@100mhz 350ma 5% 0402 tdk mlk1005s10njt000 27 3 r1,r2,r20 0 res mf zero ohm 1/16w 5% 0402 rohm mcr01mzpj000 28 3 r4,r13,r1 4 0 res mf zero ohm 1/10w -- 0603 vishay intertechnology crcw06030000z0ea 29 4 r5,r10,r1 1,r12 220 res mf 220 ohm 1/10w 5% 0603 koa speer rk73b1jttd2 21j 30 3 r6,r7,r8 dnp 10.0k res mf 10.0k 1/16w 1% aec-q200 0402 vishay intertechnology crcw040210k0fke d 31 9 r15,r16,r 17,r18,r1 9,r21,r22, r23,r24 dnp 0 res mf zero ohm 1/16w 5% 0402 rohm mcr01mzpj000 32 10 sh1,sh2,s h3,sh4,sh 5,sh6,sh7 ,sh8,sh9, sh10 0 zero ohm cut trace 0402 pads; no part to order layout element only layout element only 33 3 sw1,sw2, sw3 tl1015af1 60qg sw spst pb 50ma 12v smt e switch tl1015af160qg 34 1 s1 dnp bmi-s-103 shield rf 1032x1032mil 1 piece laird technologies bmi-s-103 table 5. bill of materials (common parts for all fre quency bands) (sheet 2 of 3) item qty reference value description mfg. name mfg. part number
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 20 freescale semiconductor, inc. pcb manufacturing specifications notes ? frdm-cr20a includes neither j5 (the sma connector) nor the external antenna. ? for external measurements and/or external antenna usage, j5 should be installed and soldered in place. ? a 50 ohm sma jack connector is required; recommend ed part number 142-0701-851 from emerson/johnson. ? for an external antenna, the screw terminal 2.4 gh z antenna, part number b4844-01 from antenova is recommended. ? other external components can be found via supplie rs/distributors such as mouser, digikey, newark, etc. 5 pcb manufacturing specifications this section provides the specifications used to ma nufacture the frdm-cr20a development printed circuit board (pcb) described in this guide. the frdm-cr20a development platform pcbs must compl y with the following: ? the pcb must comply with perfag1d/3c ( www.perfag.dk/en/ ) 35 18 tp1,tp2,t p3,tp4,tp 5,tp6,tp7, tp8,tp9,t p10,tp11, tp12,tp13 ,tp15,tp1 6,tp17,tp 26,tp27 tpad_040 test point pad 40mil dia smt, no part to order notacomponent notacomponent 36 3 tp18,tp19 ,tp20 tpad_030 test point pad 30mil dia smt, no part to order notacomponent notacomponent 37 5 tp21,tp22 ,tp23,tp2 4,tp25 dnp test point white test point white 40 mil drill 180 mil th 109l keystone electronics 5002 38 1 u1 mcr20a ic xcvr 2.4ghz 250kbps o-qpsk 1.8-3.6v maplga41 freescale semiconductor mcr20avhm 39 1 u2 txb0108 ic vxltr 8bit bidir 15kv esd 1.2-3.6v/1.65-5.5v tssop20 texas instruments txb0108pwr 40 1 y1 32mhz xtal 32mhz 9pf -- smt 3.2x2.5mm ndk exs00a-cs02368 41 1 z1 2400mhz 50ohm xfmr balun 2400 +/-100mhz smt murata ldb212g4005c-001 table 5. bill of materials (common parts for all fre quency bands) (sheet 3 of 3) item qty reference value description mfg. name mfg. part number
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 21 pcb manufacturing specifications ? the pcb manufacturer?s logo is required ? the pcb production week and year code is required ? the manufacturer?s logo and week/year code must be stamped on the back of the pcb solder mask ? the pcb manufacturer cannot insert text on the pcb either in copper or in silkscreen without written permission from freescale semiconductor, in c. ? the required underwriter?s laboratory (ul) flammab ility rating ? the level is 94v-0 ( www.ul.com/plastics/flame.html ) ? the ul information must be stamped on the back of the pcb solder mask note ? a complete set of design files is available for th e mcr20avhm transceiver at the freescale website ( freescale.com/mcr20a ) under the ?software and tools.? these reference designs shoul d be used as a starting point for a custom application. ? the application note (an5003) is also available at the same web site to provide additional design guidance ? the freescale ieee 802.15.4 / zigbee package and hardwa re layout considerations reference manual , (zhdcrm) is also available at the same web site to provide additional design guidance . 5.1 single pcb construction this section describes individual pcb construction details. ? the frdm-cr20a pcbs are two-layer, multi layer des igns ? the pcbs contain no blind, buried, or micro vias ? pcb data: ? frdm-cr20a size: approximately 73x 53mm (2.88 x 2. 10 inches) ? frdm-cr20a final thickness (cu/cu): 1.57 mm (0.62 inches) +/- 10% (excluding solder mask) table 6 defines some of the layers of the completed pcb. t he artwork identification refers to the name of the layer in commonly used terms. table 6. mcr20avhm layer by layer overview layer artwork identification file name 1 silkscreen top pss.art 2 top layer metal l1_ps.art 3 bottom layer metal l2_ss.art 4 silkscreen bottom sss.art
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 22 freescale semiconductor, inc. pcb manufacturing specifications important : the frdm-cr20a development board contains high fr equency 2.4 ghz rf circuitry. as a result, rf component placement, line geometrie s and layout, and spacing to the ground plane are critical parameters. board stackup geometry is crit ical. dielectric and copper thicknesses and spacing must not be changed; follow the stackup (see figure 17 ) information provided with the reference design. figure 17. frdm-cr20a pcb stackup cross-section (fou r layer) ? solder mask is required ? silk screen is required 5.2 panelization the panel size can be negotiated depending on produ ction volume. 5.3 materials the pcb composite materials must meet the following requirements: ? laminate?the base laminate material must be fr4. i f the laminate material is changed, the rf electrical characteristics may change and degrade r f performance. ? copper foil ? top and bottom copper layers must be 1 oz. copper ? plating?all pad plating must be hot air levelling (hal) 5.4 solder mask the solder mask must meet the following requirement s: ? solder mask type: liquid film electra emp110 or eq uivalent ? solder mask thickness: 10 ? 30 m 5.5 silk screen the silk screen must meet the following requirement s: ? silk screen color: white ? silk screen must be applied after application of s older mask if solder mask is required ? the silk screen ink must not extend into any plate d-thru-holes ? the silk screen must be clipped back to the line o f resistance
freescale freedom development board frdm-cr20a user ?s guide, rev. 0, 04/2015 freescale semiconductor, inc. 23 revision history 5.6 electrical pcb testing ? all pcbs must be 100 percent tested for opens and shorts ? impedance measurement - an impedance measurement r eport is not mandatory 5.7 packaging packaging for the pcbs must meet the following requ irements: ? finished pcbs must remain in panel ? finished pcbs must be packed in plastic bags that do not contain silicones or sulphur materials. these materials can degrade solderability. 5.8 hole specification/tool table see the ncdrill-1-4.tap file included with the gerber files and the fab-28535.pdf file. 5.9 file description files included with the download include design, ge rber, and pdf files. gerber files are rs-274x forma t. not all files included with the gerber files are fo r pcb manufacturing. pdf files included are: ? fab-28535.pdf ?frdm- board fabrication drawing ? grb-28535.zip ?frdm- metal layers, solder mask, solder paste and silk screen ? spf-28535.pdf ?frdm- schematic design files are in allegro format with orcad schem atic capture. 6 revision history rev. number date substantive change(s) 0 03/2015 initial public release.
document number: FRDMCR20AUG rev. 0 04/2015 information in this document is provided solely to enable system and software implementers to use freescale products. there are n o express or implied copyright licenses granted hereunder to design or fabricate a ny integrated circuits based on the information in this document. freescale reserves the right to make changes withou t further notice to any products herein. freescale makes no warranty, representation , or guarantee regarding the suitability of its products for any particular purp ose, nor does freescale assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. ?typical? parameters that may be provided in freescale data sheets and/or specifications can and do vary in different applica tions, and actual performance may vary over time. all operating parameters, including ?typicals,? must be validated for each customer application by customer?s technical e xperts. freescale does not convey any license under its patent rights nor the rights of others. freescale sells products pursuant to standard terms and conditions of sale, which can be found at the following address: freescale.com/salestermsandconditions. how to reach us: home page: freescale.com web support: freescale.com/support freescale, the freescale logo, and kinetis are trad emarks of freescale semiconductor, inc., reg. u.s. pat. & tm. off. all other product or service names are the property of their respective owners. ? 2015 freescale semiconductor, inc.

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