National Instruments NI roboRIO, Руководство пользователя

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NI roboRIO User Manual
I
2
C Port
Figure 6 and Table 5 describe the I 2 C port pins and signals.
Figure 6. I
2
C Port Pinout
RS-232 Port
Figure 7 and Table 6 describe the RS-232 port pins and signals.
Figure 7.
RS-232 Serial Port Pinout
Table 5. I
2
C Port Signal Descriptions
Signal Name Direction Description
GND — Reference for digital lines and +3.3 V power
output.
3.3V Output +3.3 V power output.
SCL Input or Output I 2 C lines with 3.3 V output, 3.3 V/
5 V-compatible input. Refer to the I
2
C Lines
section for more information.
SDA Input or Output
Table 6. RS-232 Serial Port Signal Descriptions
Signal Name Direction Description
TXD Output Serial transmit output with ±5 V to ±15 V signal
levels. Refer to the
UART and RS-232 Lines
section for more information.
RXD Input Serial receive input with ±15 V input voltage
range. Refer to the
UART and RS-232 Lines
section for more information.
GND — Reference for digital lines.
3.3V
SCL
SDA
RXD
TXD