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Pin
RS232 Signal
19
UART_TX
20
UART_RX
Note 1: COM RS-232/ 422/ 485 mode can be set by BIOS. Default is RS-232.
Note 2: RI1/+5V/+12V can be set by BOM (R423 RI/ R369 +12V/ R370 +5V). Default is
RING.
Note 3: RI2/+5V/+12V can be set by BOM (R424 RI/ R372 +12V/ R373 +5V). Default is
RING.
Note 4: Max current: 0.5A for each port.
2.4.15
SPI Port (CN17)
Pin
Pin Name
1
SPI_SO
2
GND
3
SPI_CLK
4
+V3P3A_SPI
5
SPI_SI
6
SPI_CS
7
NC
Chapter 2 – Hardware Information
RS422 Signal
-
-
Signal Type
Signal
GND
Signal
PWR
Signal
Signal
-
RS485 Signal
-
-
Signal Level
-
-
-
+3.3V
-
-
-
32
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