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A.11
Dual-UART connector
One dual-UART connector provides access to the MCC.
The UART port enables you to access the command-line interface in the MCC and perform application
software debugging.
Note
The UART I/O voltage at the connectors is 3.3V.
The following figure shows the dual-UART connector, J57.
Pin 6
Pin 9
Pin 1
Pin 5
Pin 6
Pin 9
Pin 1
Pin 5
UART 0
UART 1
Figure A-13 Dual-UART connector, J57A, upper, and J57B, lower
The following table shows the pin mapping for UART 0. This is the upper connector, J57A, of the
dual-UART connector, J57.
Table A-11 UART 0 connector, J57A, signal list
Pin Signal
A1 No connection
A2
SER0_RX
A3
SER0_TX
A4
SER0_DTR
A5
GND
A6
SER0_DSR
A7
SER0_RTS
A8
SER0_CTS
A9 No connection
The following table shows the pin mapping for UART 1. This is the lower connector, J57B, of the
dual-UART connector, J57.
Table A-12 UART 1 connector, J57B, signal list
Pin Signal
A1 No connection
A2
SER1_RX
A3
SER1_TX
A4
SER1_DTR
A5
GND
A6
SER1_DSR
A7
SER1_RTS
A Signal Descriptions
A.11 Dual-UART connector
ARM 100114_0200_03_en
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Appx-A-143
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