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| may 2016 docid029199 rev 1 1/11 1 UM2049 user manual dsi to raspberry pi ? lcd adapter board introduction the dsi to raspberry pi ? lcd adapter board (order code b-lcdad-rpi1) provides a flexible connector from the microcontrolle r motherboard (samtec high speed connector qth-030) to the standard raspberry pi ? display connector (te 1-1734248). it can be used on stm32 evaluation boards or discove ry boards to connect a raspberry pi ? display, which is compatible wit h the raspberry pi ? board dsi interface connector. the b-lcdad-rpi1 adapter board features up to two lanes of mipi/dsi data and i2c interface support, and enables the use of extended displays with standard raspberry pi ? dsi interface on stm32 eval/dk board family. figure 1. adapter board (left: backside, right: front) note: pictures not contractua l www.st.com
contents UM2049 2/11 docid029199 rev 1 contents 1 hardware layout and configurat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 motherboard connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 raspberry pi? lcd connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 docid029199 rev 1 3/11 UM2049 list of tables 3 list of tables table 1. motherboard connector cn2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2. raspberry pi? connector cn1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 3. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 list of figures UM2049 4/11 docid029199 rev 1 list of figures figure 1. adapter board (left: backside, right: front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 figure 2. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 3. board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 4. board schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 docid029199 rev 1 5/11 UM2049 hardware layout and configuration 10 1 hardware layout and configuration the board is designed for easy use of the raspberry pi ? display. the block diagram shown in figure 2 illustrates the dsi and i2c control connection on the raspberry pi ? lcd adapter board. figure 3 indicates how to locate the components on the evaluation board (both front and back side are shown). figure 2. block diagram 0 6 9 0 r w k h u e r d u g 0 & 8 0 6 9 5 d v s e h u u \ 3 l ? ' 6 , / & ' ' 6 , w r 5 d v s e h u u \ 3 l ? / & ' d g d s w h u e r d u g 0 r w k h u e r d u g f r q q h f w r u 5 6 3 / & ' f r q q h f w r u & d e o h ' 6 , v l j q d o v & r q w u r o v l j q d o v hardware layout and configuration UM2049 6/11 docid029199 rev 1 figure 3. board layout 0 6 9 & 1 p r w k h u e r d u g f r q q h f w r u e r w w r p v l g h & 1 5 d v s e h u u \ 3 l ? / & ' f r q q h f w r u docid029199 rev 1 7/11 UM2049 motherboard connector 10 2 motherboard connector a male high speed connector cn2 on bottom side is used to implement dsi to raspberry pi ? lcd adapter board on the motherboard. two-lanes dsi signals and control signals (i2c bus) are on this connector. the pinout is detailed in table 1 . table 1. motherboard connector cn2 pin no. (odd) description interface pin no. (even) description interface 1gnd-2 - - 3 dsi_ck_p dsi 4 - - 5 dsi_ck_n dsi 6 - - 7gnd-8 - - 9 dsi_d0_p dsi 10 - - 11 dsi_d0_n dsi 12 - - 13 gnd - 14 - - 15 dsi_d1_p dsi 16 - - 17 dsi_d1_n dsi 18 - - 19 gnd - 20 - - 21 - - 22 - - 23 - - 24 - - 25 - - 26 - - 27 - - 28 - - 29 - - 30 - - 31 - - 32 - - 33 - - 34 - - 35 - - 36 +3.3v - 37 - - 38 - - 39 - - 40 i2c_sda i2c 41 - - 42 - - 43 - - 44 i2c_scl i2c 45 - - 46 - - 47 - - 48 - - 49 - - 50 - - 51 - - 52 - - 53 - - 54 - - 55 - - 56 - - 57 - - 58 - - 59 - - 60 - - raspberry pi? lcd connector UM2049 8/11 docid029199 rev 1 3 raspberry pi ? lcd connector a standard raspberry pi ? lcd connector cn1 is implemented on dsi to raspberry pi ? lcd adapter board. the pinout is detailed in table 2 . table 2. raspberry pi ? connector cn1 pin number description pin number description 1gnd16 - 2 dsi_d1_n 17 - 3 dsi_d1_p 18 - 4gnd19 - 5 dsi_ck_n 20 - 6 dsi_ck_p 21 - 7gnd22 - 8 dsi_d0_n 23 - 9 dsi_d0_p 24 - 10 gnd 25 - 11 i2c_scl 26 - 12 i2c_sda 27 - 13 gnd 28 - 14 +3.3v 29 - 15 +3.3v 30 - schematics UM2049 9/11 docid029199 rev 1 4 schematics figure 4. board schematics 11 overview mb1233 a.1 5/23/2016 title: size: reference: date: sheet: of a4 revision: raspberrypi adapter project: dsi_ck_p dsi_ck_n dsi_d0_p dsi_d0_n dsi_d1_p dsi_d1_n i2c_scl i2c_sda 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 cn1 1-1734248-5 vdd i2c_sda i2c_scl connector for motherboard c1 100nf 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 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 54 54 55 55 56 56 57 57 58 58 59 59 60 60 61 61 62 62 63 63 64 64 cn2 qth-030-02-f-d-a dsi_ck_p dsi_ck_n dsi_d0_p dsi_d0_n dsi_d1_p dsi_d1_n vdd connector for raspberrypi lcd revision history UM2049 10/11 docid029199 rev 1 5 revision history table 3. document revision history date revision changes 30-may-2016 1 initial release. docid029199 rev 1 11/11 UM2049 11 important notice ? please read carefully stmicroelectronics nv and its subsidiaries (?st?) reserve the right to make changes, corrections, enhancements, modifications, and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant in formation on st products before placing orders. st products are sold pursuant to st?s terms and conditions of sale in place at the time of o rder acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers? products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information set forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2016 stmicroelectronics ? all rights reserved |
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