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.
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276.53.010.01
267.03.010.01
Mating Stacker
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1.27mm Socket