DSPIC33EP64GS708 datasheet(143/484 Pages) MICROCHIP

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 2016-2018 Microchip Technology Inc.

DS70005258C-page 143

dsPIC33EPXXXGS70X/80X FAMILY

The Peripheral Pin Select (PPS) pin mapping rules

are as follows:

Only one “output” function can be active on a

given pin at any time, regardless if it is a

dedicated or remappable function (one pin,

one output).

It is possible to assign a “remappable output”

function to multiple pins and externally short or

tie them together for increased current drive.

If any “dedicated output” function is enabled

on a pin, it will take precedence over any

remappable “output” function.

If any “dedicated digital” (input or output) func-

tion is enabled on a pin, any number of “input”

remappable functions can be mapped to the

same pin.

If any “dedicated analog” function(s) are

enabled on a given pin, “digital input(s)” of any

kind will all be disabled, although a single “dig-

ital output”, at the user’s cautionary discretion,

can be enabled and active as long as there is

no signal contention with an external analog

input signal. For example, it is possible for the

ADC to convert the digital output logic level, or

to toggle a digital output on a comparator or

ADC input, provided there is no external

analog input, such as for a built-in self-test.

Any number of “input” remappable functions

can be mapped to the same pin(s) at the same

time, including to any pin with a single output

from either a dedicated or remappable “output”.

The TRISx registers control only the digital I/O

output buffer. Any other dedicated or remap-

pable active “output” will automatically override

the TRISx setting. The TRISx register does not

control the digital logic “input” buffer. Remap-

pable digital “inputs” do not automatically

override TRISx settings, which means that the

TRISx bit must be set to input for pins with only

remappable input function(s) assigned.

All analog pins are enabled by default after any

Reset and the corresponding digital input buffer

on the pin has been disabled. Only the Analog

Pin Select (ANSELx) registers control the digi-

tal input buffer, not the TRISx register. The user

must disable the analog function on a pin using

the Analog Pin Select registers in order to use

any “digital input(s)” on a corresponding pin, no

exceptions.

11.8

I/O Ports Resources

Many useful resources are provided on the main prod-

uct page of the Microchip website for the devices listed

in this data sheet. This product page contains the latest

updates and additional information.

11.8.1

KEY RESOURCES

• “I/O Ports” (DS70000598) in the “dsPIC33/PIC24

Family Reference Manual”

• Code Samples

• Application Notes

• Software Libraries

• Webinars

• All Related “dsPIC33/PIC24 Family Reference

Manual” Sections

• Development Tools

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