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User Guide XB1 COM Express Module
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P-SIO
The connector P-SIO is normally not stuffed. The mature PS/2 and UART ports have been overcome by
USB in most applications. For low level debugging however, these interfaces can be very useful (e.g.
the BIOS can communicate across the serial I/O). Please contact EKF before ordering the XB1 COM
Express Module, if the P_SIO connector is required by the user.
P-SIO
MS_CLK
1
2
MS_DAT
KB_CLK
3
4
KB_DAT
COM_CTS# (TTL)
5
6
COM_RTS# (TTL)
COM_RXD (TTL)
7
8
COM_TXD (TTL)
GND
9
10
+5V
The UART port does not include RS-232 transceivers (TTL level signals only). If necessary, the user must
provide RS-232 or RS-485 transceivers externally.
2
1
10
276.53.010.01
267.03.010.01
Mating Stacker
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1.27mm Socket