Digilent chipKIT Pro MX7 Reference Manual page 18

chipKIT™ Pro MX7 Board Reference Manual
2
times on the I C signals and provides the ability to drive longer cable runs reliably than would be the case with
simple pull-up resistors.
When using the chipKIT Pro MX7 with the MPIDE and the chipKIT system, the I
standard chipKIT Wire library, or the Digilent DTWI library.
The Wire library supports a single I
The DTWI library supports four I
connector J7, and the DTWI1 object class is used to access I2C2, connector J8. The DTWI2 object class is used to
access I2C3, Pmod port JE, and the DTWI3 object class is used to access I2C5, Pmod port JF.
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The pinouts of the I C connectors are as follows:
Connector J7 – I2C1
 J7-1, J7-2 – SCL1
 J7-3, J7-4 – SDA1
 J7-5, J7-6 – GND
 J7-7, J7-8 – VCC3V3
Connector J8 – I2C2
 J8-1, J8-2 – SCL2
 J8-3, J8-4 – SDA2
 J8-5, J8-6 – GND
 J8-7, J8-8 – VCC3V3
Pmod port JE – I2C3
 JE-02 – SCL3
 JE-03 – SDA3
Pmod port JF – I2C5
 JF-02 – SCL5
 JF-03 – SDA5
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Pull-ups
Enabled
2
Jumper Settings for I C Pull-Up Resistor
2 C interface, I2C2 on J8. This is accessed using the Wire object.
2 C interfaces. The DTWI0 object class is used to create an object for access to I2C1,
Pull-ups
Disabled
2
C interfaces are accessed using the
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