Chapter 9: Breakout Board
RS-232 / UART Data Pins
Psion Teklogix Omnii HDK User Manual
137
Figure 9.16 RS-232 Header J30 Pin Order
To configure the data pins on the breakout board for a serial device connected to the 6-pin in-line
UART connector (J11), set the following jumpers as indicated:
Figure 9.17 UART Data Pin Jumper Headers
3
TXD
Transmitted Data
4
DTR
Data Terminal Ready
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request to Send
8
CTS
Clear to Send
9
RI
Ring Indicator
Table 9.10 UART Data Pin Jumper Settings
Jumper
Pins
Function
J16
1-2
UART_TXD & RS-232 TXD
/ SPI_INT & GPIO_0
J17
1-2
UART_RXD & RS-232 RXD
/ GPIO_1
J18
1-2
UART_CTS & RS-232 CTS
/ GPIO_2
J19
1-2
UART_RTS & RS-232 RTS
/ GPIO_3
J20
1-2
UART_TXD
/ RS232_TXD
J21
1-2
UART_CTS
/ RS232_CTS
J22
1-2
UART_RXD
/ RS232_RXD
J23
1-2
UART_RTS
/ RS232_RTS
Table 9.9 RS-232 Header J30 Pinout
Pin
Name
Description
1 2 3 4 5
6 7 8 9
2
1
3
2
1
3
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