Digi NS9210 - Manual (Page 47)

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www.digiembedded.com 47
Serial port D pins are allocated as shown:
By default, Serial D signals are configured to their respective GPIO signals.
It is the responsibility of the driver to configure them properly.
Serial port A TTL
interface
The serial (UART) port A interface is a TTL interface connected to a 2x5 pin, 0.1”
connector, X4. The connector supports only TTL level.
The serial port A interface corresponds to NS9215 UART port A.
Serial port A pins are allocated as shown:
By default, Serial A signals are configured to their respective GPIO signals. It is the
responsibility of the driver to configure them properly.
Serial Port A must not be connected if SPI or WakeUp functionality is used.
Pin Function Defaults to
1 DCD# GPIO59
2 RXD GPIO62
3 TXD GPIO66
4 DTR# GPIO65
5 GND
6 DSR# GPIO61
7 RTS# GPIO64
8 CTS# GPIO60
9 RIB# GPIO63
Pin Function Defaults to Comment
1 DCDA#/SPI_EN# GPIO0 Can be programmed as SPI enable to X4
2 DSRA# GPIO2
3 RXDA/SPI_RXD GPIO3 Can be programmed as SPI receive data to X4
4 RTSA#/SPI_CLK GPIO5 Can be programmed as SPI clock to X4
5 TXDA/SPI_TXD GPIO7 Can be programmed as SPI transmit data to X4
6 CTSA# GPIO1
7 DTRA# GPIO6
8 RIA#/EIRQ2 GPIO4 This signal is default configured to support the wake-
up button on the development board.
9 GND
10 3.3V