
A-4
|
ni.com
Appendix A
Reference Carrier Board Specifications and User Guide
Table A-2 describes the specific pins and signals on the sbRIO-9651 SOM connector used to
implement a Pmod I
2
C connector.
Note
Refer to the
section of this chapter for more
information about the Pmod I
2
C connector pins and signals on the reference carrier
board.
RTC Battery
The reference carrier board provides a battery backup for the RTC on the sbRIO-9651 SOM.
Support Signals
The reference carrier board implements support signals in the following ways:
•
STATUS_LED and TEMP_ALERT signals are routed to user-visible LEDs.
•
SYS_RST# is connected to a Reset push button.
Connector Pinouts
RS-232, RS-4
8
5, and CAN Connector Pinouts
The RS-232, RS-485, and CAN connectors on the reference carrier board use the port shown in
Figure A-1. Table A-3 describes the pins and signals on each port.
Figure A-1.
RS-232, RS-4
8
5, and CAN Port Pin Locations
Table A-2.
Pmod I
2
C Connector Signal Definitions
Signal Name
*
Pin #
DIO Signal
PMOD_I2C_SCL1
PMOD_I2C_SCL2
105
129
DIO_16
DIO_17
PMOD_I2C_SDA1
PMOD_I2C_SDA2
113
137
DIO_16_N
DIO_17_N
*
All signals have both I/O directions and comply with the LVTTL I/O standard.
Pin 1
Pin 5
Pin 6
Pin 9