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SimuSound Connector PCB

3 months ago 37
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SimuSound Connector PCB

A carrier board for the Raspberry Pi Compute Module 4. Same outline as the CM4, has 2x MIPI connectors, ICM-20689 IMU, 1x USB via 1mm JST connector, various GPIOs (1mm JST connectors), various test points.


  • SCL1/SDA1 and SDL0/SDA0 should be swapped
  • USB_OTG_ID should be grounded
  • USB is extremely unreliable, should not be routed underneath the 100-pin connector
  • Differential pairs (MIPI/USB) should be length matched more accurately
  • USB via 1mm JST not the best method


CM4 Cams and Coral

CM4 Lo-speed and power




ID Name Designator Footprint Quantity
1 100nF C1,C2,C4,C5,C6 C0402_NEW 5
2 100uF C3 CAP-SMD_L3.5-W2.8 1
3 Cam 0 J1 TE_1-84952-5 1
4 Cam 1 J2 TE_1-84952-5 1
5 Coral USB and GLOBAL_EN J3 JST-6-SMD-VERT-1.0MM 1
6 Debug UART and GPIO J4 JST-6-SMD-VERT-1.0MM 1
7 Debug IMU J5 JST-6-SMD-VERT-1.0MM 1
8 2mm header to power board J6 JST_B4B-PH_HEADER 1
9 3.3K R1,R2 R0603_NEW 2
10 Activity LED TP1 PAD.03X.05 1
11 Power LED TP2 PAD.03X.05 1
12 RUN_PG pad TP3 PAD.03X.05 1
13 EXTRST pad TP4 PAD.03X.05 1
14 Analog1 pad TP5 PAD.03X.05 1
15 Analog0 pad TP6 PAD.03X.05 1
16 RPIBOOT TP7 PAD.03X.05 1
17 EEPROM WP pad TP8 PAD.03X.05 1
18 ICM-20689 U1 QFN-24_L4.0-W4.0-P0.50-TL-EP2.6 1
19 RPi CM4 Right (Hi-speed) Connector X1 RASPBERRY PI COMPUTE MODULE 4 RIGHT 1
20 RPi CM4 Left (Lo-speed) Connector X2 RASPBERRY PI COMPUTE MODULE 4 LEFT 1




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