Communication Channels

Some devices have the flexibility to use one of several communication channels or pins for programming and debugging. These channels are generally referred to in data sheets as PGCx/PGDx, where x is the channel number identifier. As mentioned earlier, these channels are often multiplexed with some peripherals (I2C™, SPI, A/D).

If your application uses those peripherals and pins which are common to the default PGC/PGD pins, you must select a different channel and make provisions for the required ICSP connections. Likewise, when using MPLAB X IDE to communicate with the target using this new channel pin assignment, you must ensure that the Configuration bits in MPLAB X IDE match the connection channel in your target.

For some devices programming speeds can be slower on PGC3/PGD3 because they cannot make use of certain programming enhancements (i.e., a programming executive). Consult any data sheet errata for details.

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