Table 23. Daughterboard Connector Cn4; Table 24. Daughterboard Connector Cn5 - STMicroelectronics STM32G081B-EVAL User Manual

Connectors
Pin Signal
1 PA1 MC_BusVoltage
2 PA15 -
3 PB6 I2C1_SCL
4 PB7 I2C1_SDA
5 GND -
6 RESET# -
7 PC6 MC_ENA
8 PB13 -
9 PB14 -
10 PB1 MC_PFCpwm
11 PB10 MC_CurrentC
12 PA3 MC_heatsinkTemp
MC_EmergencyST
13 PB12
OP
14 +3V3 -
Daughterboard
15 PB11
detection
16 VDD_ANA -
I2C pull up power
17 I2C_PU
of CN2
18 VDD -
Pin Signal
1 PA8 MC_UH
MC_Dissipative
2 PB15
brake
MC_VH/USART1_
3 PA9
TX_BOOT
MC_WH/USART1_
4 PA10
RX_BOOT
5 GND -
6 PD4 MC_WL
34/79

Table 23. Daughterboard connector CN4

Mother board
daughterboard
Function
Function (CN5)
LDR_OUT
Smartcard RST
I2C1_SCL
I2C1_SDA
-
-
IR_IN
I2C2_SCL
I2C2_SDA
-
HDMI_CEC
Smartcard 1V8
Smartcard OFF
-
Daughterboard
detection
-
-
-

Table 24. Daughterboard connector CN5

Mother board
daughterboard
Function
Function (CN4)
-
Smartcard 3/5 V
-
-
-
Smartcard CK
Legacy UCPD
daughterboard
Function (CN9)
V_CTL2
USB3_DET
I2C1_SCL
I2C1_SDA
-
-
Display port
HPD_SOURCE
DISCHARGE 1
DISCHARGE 2
VSENSE 1
ISENSE 1
VSENSE 2
ISENSE 2
-
Daughterboard
detection & USB
PD output VSENSE
-
-
-
Legacy UCPD
daughterboard
Function (CN8)
PORT1_CC1
PORT1_CC2
PORT1_DB1
PORT1_DB2
-
VCONN_EN1
UM2403 Rev 2
UM2403
How to disconnect with
function block on mother
board
Keep JP1 open
-
-
-
-
-
-
-
-
-
-
Keep JP2 open
Keep JP3 open
-
-
-
-
-
How to disconnect with
function block on mother
board
-
-
Keep JP10 pin2-3 open
Keep JP8 pin2-3 open
-
-