Datasheet

16
TMS320F28379S , TMS320F28377S
TMS320F28376S, TMS320F28375S, TMS320F28374S
SPRS881C –AUGUST 2014–REVISED MAY 2016 www.ti.com
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Terminal Configuration and Functions Copyright © 2014–2016, Texas Instruments Incorporated
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
ZWT
BALL
NO.
PTP
PIN
NO.
PZP
PIN
NO.
ADC, DAC, AND COMPARATOR SIGNALS
V
REFHIA
V1 37 19 I
ADC-A high reference. Place at least a 1-µF capacitor
on this pin for the 12-bit mode, or at least a 22-µF
capacitor for the 16-bit mode. This capacitor should be
placed as close to the device as possible between the
V
REFHIA
and V
REFLOA
pins.
NOTE: Do not load this pin externally.
V
REFHIB
W5 53 37 I
ADC-B high reference. Place at least a 1-µF capacitor
on this pin for the 12-bit mode, or at least a 22-µF
capacitor for the 16-bit mode. This capacitor should be
placed as close to the device as possible between the
V
REFHIB
and V
REFLOB
pins.
NOTE: Do not load this pin externally.
V
REFHIC
R1 35 – I
ADC-C high reference. Place at least a 1-µF capacitor
on this pin for the 12-bit mode, or at least a 22-µF
capacitor for the 16-bit mode. This capacitor should be
placed as close to the device as possible between the
V
REFHIC
and V
REFLOC
pins.
NOTE: Do not load this pin externally.
V
REFHID
V5 55 – I
ADC-D high reference. Place at least a 1-µF capacitor
on this pin for the 12-bit mode, or at least a 22-µF
capacitor for the 16-bit mode. This capacitor should be
placed as close to the device as possible between the
V
REFHID
and V
REFLOD
pins.
NOTE: Do not load this pin externally.
V
REFLOA
R2 33 17 I
ADC-A low reference.
On the PZP package, pin 17 is double-bonded to V
SSA
and V
REFLOA
. On the PZP package, pin 17 must be
connected to V
SSA
on the system board.
V
REFLOB
V6 50 34 I ADC-B low reference
V
REFLOC
P2 32 – I ADC-C low reference
V
REFLOD
W6 51 – I ADC-D low reference
ADCIN14
T4 44 26
I 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 (either single-ended or differential) from
an external reference.
CMPIN4P I Comparator 4 positive input
ADCIN15
U4 45 27
I 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 (either single-ended or differential) from
an external reference.
CMPIN4N I Comparator 4 negative input
ADCINA0
U1 43 25
I 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 O DAC-A output