Pin
Signal
Mother board function
Legacy
daughterboard
function
(MB1351_CN5)
UCPD
daughterboard
function
(MB1352_CN9)
How to disconnect with
function block on mother
board
11
PB10
MC_CurrentC
HDMI_CEC
ISENSE 1
-
12
PA3
MC_heatsinkTemp
SmartCard 1V8
VSENSE 2
Keep JP5 OFF
13
PB12
MC_EmergencySTOP
SmartCard OFF
ISENSE 2
Keep JP7 OFF
14
+3V3
-
-
-
-
15
PB11
Daughterboard detection
Daughterboard
detection
Daughterboard
detection
-
16
VDD_ANA
-
-
-
-
17
I2C_PU
I
2
C pull-up power of CN4
-
-
-
18
VDD
-
-
-
-
Table 24.
CN3 daughterboard connector
Pin
Signal
Mother board function
Legacy
daughterboard
function
(MB1351_CN4)
UCPD
daughterboard
function
(MB1352_CN8)
How to disconnect with
function block on mother
board
1
PA8
MC_UH
-
PORT1_CC1
-
2
PB15
MC_Dissipativebrake
SmartCard
3 V/5 V
PORT1_CC2
-
3
PA9
MC_VH/
USART1_TX_BOOT
-
PORT1_DB1
Keep JP15 pin2-3 OFF
4
PA10
MC_WH/
USART1_RX_BOOT
-
PORT1_DB2
Keep JP13 pin2-3 OFF
5
GND
-
-
-
-
6
PD4
MC_WL
SmartCard CK
VCONN_EN1
-
7
PB9
MC_NTC
IR_OUT
VCONN_EN2
-
8
PA2
MC_Current A
SmartCard TX
FRS_TX1
-
9
PB0
MC_ENINDEX
SmartCard
CMDVCC
FRS_TX2
-
10
+5V
-
-
-
-
11
PB5
MC_ENB
Temp Sensor INT DisplayPort
™
HPD_IN
-
12
PC1
MC_PFCsync1
-
PWM_CTL
-
13
PD0
MC_PFCsync2
-
PORT2_CC1
-
14
PD2
MC_UL
HDMI_
HPD_SINK
PORT2_CC2
-
15
PD3
MC_VL
HDMI_
HPD_SOURCE
SOURCE_EN
-
16
D5V
-
-
-
-
17
EXT I2C PWR
Power of CN4
5 V
VDD
-
18
VDD
-
-
-
-
UM2783
Connectors on mother board (MB1581)
UM2783
-
Rev 1
page 29/59