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UM2403
Pin
Signal
1
PA1
2
PA15
3
PB6
4
PB7
5
GND
6
RESET#
7
PC6
8
PB13
9
PB14
10
PB1
11
PB10
12
PA3
13
PB12
14
+3V3
15
PB11
16
VDD_ANA
17
I2C_PU
18
VDD
Pin
Signal
1
PA8
2
PB15
3
PA9
4
PA10
5
GND
6
PD4
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Table 21. Daughterboard connector CN4
Legacy
Mother board
daughterboard
Function
Function (CN5)
MC_BusVoltage
LDR_OUT
-
Smartcard RST
I2C1_SCL
I2C1_SCL
I2C1_SDA
I2C1_SDA
-
-
-
-
MC_ENA
IR_IN
-
I2C2_SCL
-
I2C2_SDA
MC_PFCpwm
-
MC_CurrentC
HDMI_CEC
MC_heatsinkTemp
Smartcard 1V8
MC_EmergencyST
Smartcard OFF
OP
-
-
Daughterboard
Daughterboard
detection
detection
-
-
I2C pull up power
-
of CN2
-
-
Table 22. Daughterboard connector CN5
Legacy
Mother board
daughterboard
Function
Function (CN4)
MC_UH
-
MC_Dissipative
Smartcard 3/5 V
brake
MC_VH/USART1_
-
TX_BOOT
MC_WH/USART1_
-
RX_BOOT
-
-
MC_WL
Smartcard CK
UM2403 Rev 1
UCPD
How to disconnect with
daughterboard
function block on mother
Function (CN9)
V_CTL2
Keep JP1 open
USB3_DET
-
I2C1_SCL
-
I2C1_SDA
-
-
-
-
-
Display port
-
HPD_SOURCE
DISCHARGE 1
-
DISCHARGE 2
-
VSENSE 1
-
ISENSE 1
-
VSENSE 2
Keep JP2 open
ISENSE 2
Keep JP3 open
-
-
Daughterboard
detection & USB
-
PD output VSENSE
-
-
-
-
-
-
UCPD
How to disconnect with
daughterboard
function block on mother
Function (CN8)
PORT1_CC1
-
PORT1_CC2
-
PORT1_DB1
Keep JP10 pin2-3 open
PORT1_DB2
Keep JP8 pin2-3 open
-
-
VCONN_EN1
-
Connectors
board
board
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