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4.5
SPI
4.6
SPI voltage option
4.7
RS232
CN17 Pin number
Define
PIN 1
SPI1_SCK_3V3
PIN 2
N/A
PIN 3
SPI1_MISO_3V3
PIN 4
SPI1_MOSI_3V3
PIN 5
SPI1_CS0_3V3
PIN 6
SPI1_CS1_3V3
PIN 7
N/A
PIN 8
GND
CN18 Pin number
Define
1-2
+3.3V
2-3
+1.8V
No Jumper
Floating
CN19 Pin number
Define
PIN 1
RS232_RXD
PIN 2
RS232_TXD
PIN 3
RS232_RTS
PIN 4
RS232_CTS
PIN 5
GND
