Spi Port (Cn17) - Asus AAEON PICO-EHL4 User Manual

Pin RS232 Signal
15 CTS_1
16 CTS_2
17 RI_1/12V/5V
18 RI_2/12V/5V
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
26