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P in
R S232 Signal
15
CTS_1
16
CTS_2
17
RI_1/12V/5V
18
RI_2/12V/5V
19
UART_TX
20
UART_RX
N o te 1: COM RS-232/ 422/ 485 mode can be set by BIOS. Default is RS-232.
N o te 2: RI1/+5V/+12V can be set by BOM (R423 RI/ R369 +12V/ R370 +5V). Default is
RING.
N o te 3: RI2/+5V/+12V can be set by BOM (R424 RI/ R372 +12V/ R373 +5V). Default is
RING.
N o te 4: Max current: 0.5A for each port.
2.4.15 SPI Por t (CN17)
P in
P in Name
1
SPI_SO
2
GND
3
SPI_CLK
4
+V3P3A_SPI
5
SPI_SI
6
SPI_CS
7
NC
Chapter 2 – Hardware Information
R S422 Signal
Sig nal Type
Signal
GND
Signal
PWR
Signal
Signal
R S485 Signal
Sig nal Level
+3.3V
26
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