Signal Descriptions
ARM DUI 0447J
Copyright © 2009-2014, ARM. All rights reserved.
A-3
ID052914
Non-Confidential
A.2
UART interface
The motherboard provides four serial transceivers on the rear panel of the enclosure.
Figure A-2
shows the pin numbering for the 9-pin D-type male connector used on the V2M-P1
and
Table A-1
shows the signal assignment for the connectors.
Figure A-2
shows the pinout that is configured as a
Data Communications Equipment
(DCE)
device.
Figure A-2 Serial connector
Note
Depending on system configuration, UART0 and UART1 are used for remote control, the
interface to the MCC, log file output, or Boot Monitor interface. See
Chapter 3
Configuration
.
Table A-1 Serial plug signal assignment
Pin
UART0 J24A, top
UART1 J24B, bottom
UART2 J25A, top
UART3 J25B, bottom
1
SER0_DCD
NC
NC
NC
2
SER0_RX
SER1_RX
SER2_RX
SER3_RX
3
SER0_TX
SER1_TX
SER2_TX
SER3_TX
4
SER0_DTR
SER1_DTR
a
a. The
SER1_DTR
,
SER2_DTR
, and
SER3_DTR
signals are connected to the corresponding
SER1_DSR
,
SER2_DSR
, and
SER3_DSR
signals. These signals cannot be set or read under program control.
SER2_DTR
a
SER3_DTR
a
5
SER0_GND
SER1_GND
SER2_GND
SER3_GND
6
SER0_DSR
SER1_DSR
a
SER2_DSR
a
SER3_DSR
a
7
SER0_RTS
SER1_RTS
SER2_RTS
SER3_RTS
8
SER0_CTS
SER1_CTS
SER2_CTS
SER3_CTS
9
SER0_RI
NC
NC
NC
1
2
6
7
8
9
3
4
5