Data Sheet

Compute Module 3+ Datasheet
Copyright Raspberry Pi (Trading) Ltd. 2019
Pin Name DIR Voltage Ref PDN
a
State If Unused Description/Notes
RUN and Boot Control (see text for usage guide)
RUN I 3V3
b
Pull High Leave open Has internal 10k pull up
EMMC DISABLE N I 3V3
b
Pull High Leave open Has internal 10k pull up
EMMC EN N 1V8 O 1V8 Pull High Leave open Has internal 2k2 pull up
GPIO
GPIO[27:0] I/O GPIO0-27 VDD Pull or Hi-Z
c
Leave open GPIO Bank 0
GPIO[45:28] I/O GPIO28-45 VDD Pull or Hi-Z
c
Leave open GPIO Bank 1
Primary SD Interface
d,e
SDX CLK O SDX VDD Pull High Leave open Primary SD interface CLK
SDX CMD I/O SDX VDD Pull High Leave open Primary SD interface CMD
SDX Dx I/O SDX VDD Pull High Leave open Primary SD interface DATA
USB Interface
USB Dx I/O - Z Leave open Serial interface
USB OTGID I 3V3 Tie to GND OTG pin detect
HDMI Interface
HDMI SCL I/O 3V3
b
Z
f
Leave open DDC Clock (5.5V tolerant)
HDMI SDA I/O 3V3
b
Z
f
Leave open DDC Data (5.5V tolerant)
HDMI CEC I/O 3V3 Z Leave open CEC (has internal 27k pull up)
HDMI CLKx O - Z Leave open HDMI serial clock
HDMI Dx O - Z Leave open HDMI serial data
HDMI HPD N 1V8 I 1V8 Pull High Leave open HDMI hotplug detect
CAM0 (CSI0) 2-lane Interface
CAM0 Cx I - Z Leave open Serial clock
CAM0 Dx I - Z Leave open Serial data
CAM1 (CSI1) 4-lane Interface
CAM1 Cx I - Z Leave open Serial clock
CAM1 Dx I - Z Leave open Serial data
DSI0 (Display 0) 2-lane Interface
DSI0 Cx O - Z Leave open Serial clock
DSI0 Dx O - Z Leave open Serial data
DSI1 (Display 1) 4-lane Interface
DSI1 Cx O - Z Leave open Serial clock
DSI1 Dx O - Z Leave open Serial data
TV Out
TVDAC O - Z Leave open Composite video DAC output
JTAG Interface
TMS I 3V3 Z Leave open Has internal 50k pull up
TRST N I 3V3 Z Leave open Has internal 50k pull up
TCK I 3V3 Z Leave open Has internal 50k pull up
TDI I 3V3 Z Leave open Has internal 50k pull up
TDO O 3V3 O Leave open Has internal 50k pull up
a
The PDN column indicates power-down state (when RUN pin LOW)
b
Must be driven by an open-collector driver
c
GPIO have software enabled pulls which keep state over power-down
d
Only available on Lite variants
e
The CM will always try to boot from this interface first
f
Requires external pull-up resistor to 5V as per HDMI spec
Table 3: Pin Functions
10 Release 2