TMS320F28075PZPQ datasheet(13/196 Pages) TI

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TMS320F28076, TMS320F28075

www.ti.com

SPRS902I – OCTOBER 2014 – REVISED JUNE 2020

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Product Folder Links: TMS320F28076 TMS320F28075

Terminal Configuration and Functions

4.2

Signal Descriptions

Table 4-1 describes the signals. The GPIO function is the default at reset, unless otherwise mentioned.

The peripheral signals that are listed under them are alternate functions. Some peripheral functions may

not be available in all devices. See Table 3-1 for details. All GPIO pins are I/O/Z and have an internal

pullup, which can be selectively enabled or disabled on a per-pin basis. This feature only applies to the

GPIO pins. The pullups are not enabled at reset.

Table 4-1. Signal Descriptions

TERMINAL

I/O/Z(1)

DESCRIPTION

NAME

MUX

POSITION

PTP

NO.

PZP

NO.

ADC, DAC, AND COMPARATOR SIGNALS

VREFHIA

ADC-A high reference. This voltage must be driven into the

pin from external circuitry. Place at least a 1-µF capacitor on

this pin. This capacitor should be placed as close to the

device as possible between the VREFHIA and VREFLOA pins.

NOTE: Do not load this pin externally.

VREFHIB

ADC-B high reference. This voltage must be driven into the

pin from external circuitry. Place at least a 1-µF capacitor on

this pin. This capacitor should be placed as close to the

device as possible between the VREFHIB and VREFLOB pins.

NOTE: Do not load this pin externally.

VREFHID

–

ADC-D high reference. This voltage must be driven into the

pin from external circuitry. Place at least a 1-µF capacitor on

this pin. This capacitor should be placed as close to the

device as possible between the VREFHID and VREFLOD pins.

NOTE: Do not load this pin externally.

VREFLOA

ADC-A low reference.

On the PZP package, pin 17 is double-bonded to VSSA and

VREFLOA. On the PZP package, pin 17 must be connected to

VSSA on the system board.

VREFLOB

ADC-B low reference

VREFLOD

–

ADC-D low reference

ADCIN14

Input 14 to all ADCs. This pin can be used as a general-

purpose ADCIN pin or it can be used to calibrate all ADCs

together from an external reference.

CMPIN4P

Comparator 4 positive input

ADCIN15

Input 15 to all ADCs. This pin can be used as a general-

purpose ADCIN pin or it can be used to calibrate all ADCs

together from an external reference.

CMPIN4N

Comparator 4 negative input

ADCINA0

ADC-A input 0. There is a 50-kΩ internal pulldown on this pin

in both an ADC input or DAC output mode which cannot be

disabled.

DACOUTA

DAC-A output

ADCINA1

ADC-A input 1. There is a 50-kΩ internal pulldown on this pin

in both an ADC input or DAC output mode which cannot be

disabled.

DACOUTB

DAC-B output

ADCINA2

ADC-A input 2

CMPIN1P

Comparator 1 positive input

ADCINA3

ADC-A input 3

CMPIN1N

Comparator 1 negative input

ADCINA4

ADC-A input 4

CMPIN2P

Comparator 2 positive input

ADCINA5

ADC-A input 5

CMPIN2N

Comparator 2 negative input

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