UCD3138064ARGCR.A datasheet(45/84 Pages) TI2

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ADC

Channels

S/H

12-bit SAR

ADC

12-bit SAR

ADC

ADC12 Block

ADC12

Control

ADC Channel

ADC

Averaging

Digital

Comparators

DPWM

Modules

ADC12 Registers

Analog

Comparators

ADC External Trigger (from pin)

UCD3138064A

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SLUSCA5B – DECEMBER 2015 – REVISED JANUARY 2017

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Detailed Description

Figure 6-23. ADC12 Control Block Diagram

6.4.10 Miscellaneous Analog

The Miscellaneous Analog Control (MAC) Registers are a catch-all of registers that control and monitor a

wide variety of functions. These functions include device supervisory features such as Brown-Out and

power saving configuration, general purpose input/output configuration and interfacing, internal

temperature sensor control and current sharing control.

The MAC module also provides trim signals to the oscillator and AFE blocks. These controls are usually

used at the time of trimming at manufacturing; therefore this document will not cover these trim controls.

6.4.11 Brownout

Brownout function is used to determine if the device supply voltage is lower than a threshold voltage, a

condition that may be considered unsafe for proper operation of the device.

The brownout threshold is higher than the reset threshold voltage; therefore, when the supply voltage is

lower than brownout threshold, it still does not necessarily trigger a device reset.

The brownout interrupt flag can be polled or alternatively can trigger an interrupt to service such case by

an interrupt service routine. Please see Figure 5-4.

6.4.12 Global I/O

Up to 32 pins in UCD3138x can be configured in the Global I/O register to serve as a general purpose

input or output pins (GPIO). This includes all digital input or output pins except for the RESET pin.

The pins that cannot be configured as GPIO pins are the supply pins, ground pins, ADC-12 analog input

pins, EADC analog input pins and the RESET pin. Additional digital pins not listed in this register can be

configured through their local configuration registers.

There are two ways to configure and use the digital pins as GPIO pins:

1. Through the centralized Global I/O control registers.

2. Through the distributed control registers in the specific peripheral that shares it pins with the standard

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