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Pin CN18
T1
T2
T3
T4
B1
B2
B3
B4
Pin CN20
T1
T2
T3
T4
B1
B2
B3
B4
6.21
RS-232 port
The STM32MP157x-EV1 board offers one RS-232 communication port. The RS-232 communication port uses the
DB9 male connector MB1262/CN12.
UM2535 - Rev 1
Figure 17.
Dual USB TYPE A connector MB1262/CN18 and CN20
Table 30.
USB Host connector pinout MB1262/CN18
Pin name
T1
T2
T3
T4
B1
B2
B3
B4
Table 31.
USB Host connector pinout MB1262/CN20
Pin name
T1
T2
T3
T4
B1
B2
B3
B4
Function
VBUS
DM
DP
GND
VBUS
DM
DP
GND
Function
VBUS
DM
DP
GND
VBUS
DM
DP
GND
UM2535
RS-232 port
page 31/55
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