Phytec phyCORE-PXA255, Hardware Manual

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RS-232 Interface
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PHYTEC Meßtechnik GmbH 2004 L-657e_0
53
10.3 IR-UART
The IR-UART has the same properties as the FF-UART, however
only the signals IR_RxD and IR_TxD are supported. The TTL level
signals RXD and CTS can be separated from the RS-232 transceiver
U42 with Jumper JP2 set to 1+2. The RS-232 transceiver is located on
the Development Board. The IR-UART extends to a 10-pin header
connector at X19, to which an optional flat band cable with a DB 9
socket can be connected.
Signal A B Signal
n.c. 1 1 n.c.
STD_RxD 2 2 n.c.
STD_TxD 3 3 n.c.
n.c.
4 4
n.c.
GND
5 5
VCC via J20
Table 38: IR-UART Connector at X19
Jumper Default Comment
JP2 This jumper connects the IR-UART to the RS-232
transceiver.
1 + 2 closed IR_RXD connected to RS-232 transceiver.
3 + 4
- BT_RXD connected to RS-232 transceiver.
5 + 6 - BT_CTS connected to RS-232 transceiver.
Table 39: IR-UART Jumper Configuration