ConnectCore for i.MX51
©2011DigiInternational,Inc. 112
By default, serial port 1 signals are configured as GPIO signals.
Serial Port 3, TTL Interface, X19
The serial (UART) port 3 interface is a TTL interface connected to a 2x5 pin, 2.54mm
connector, X19. The connector supports only TTL level signals.
The serial port 3 interface is connected to i.MX51 UART port 3.
Serial port 3 pins are allocated as shown:
By default, serial port 3 signals are configured to their respective GPIO or KEY_COL signals.
Serial port 3 is connected to the X19 connector and to the XBee module socket. Two jumpers
(J30 and J31) are used in the development board to select the connector where serial port 3
will be available. Refer to the “Jumpers” section of this document for more information.
By default serial port 3 CTS# signal is not connected to X19. A 0
Ω resistor, R44, must be
manually populated to connect this signal to the X19 connector.
Pin Function Defaults to
1NC -
2NC -
3 RXD GPIO1_22
4 RTS# KEY_COL4
5 TXD GPIO1_23
6 CTS# KEY_COL5
7NC -
8NC -
9GND -
10 +3.3V -
Downloaded from Elcodis.com electronic components distributor
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