Digi NS9210 User Manual
Page 47
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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