PIC32MX230F128L-I/PF View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC32MX230F128L-I/PF

32-bit Microcontrollers (up to 512 KB Flash and 64 KB SRAM) with Audio/Graphics/Touch (HMI), CAN, USB, and Advanced Analog

Microchip Technology 

PIC32MX1XX/2XX/5XX 64/100-PIN FAMILY

25.0 COMPARATOR VOLTAGE

REFERENCE (CVREF)

Note:

This data sheet summarizes the features

of the PIC32MX1XX/2XX/5XX 64/100-pin

family of devices. It is not intended to be

a comprehensive reference source. To

complement the information in this data

sheet, refer to Section 20. “Comparator

Voltage

Reference

(CVREF)”

(DS60001109) in the “PIC32 Family

Reference Manual”, which is available

from the Microchip web site

(www.microchip.com/PIC32).

The CVREF module is a 16-tap, resistor ladder network

that provides a selectable reference voltage. Although

its primary purpose is to provide a reference for the

analog comparators, it also may be used independently

of them.

A block diagram of the module is illustrated in

Figure 25-1. The resistor ladder is segmented to

provide two ranges of voltage reference values and has

a power-down function to conserve power when the

reference is not being used. The module’s supply refer-

ence can be provided from either device VDD/VSS or an

external voltage reference. The CVREF output is avail-

able for the comparators and typically available for pin

output.

The CVREF module has the following features:

• High and low range selection

• Sixteen output levels available for each range

• Internally connected to comparators to conserve

device pins

• Output can be connected to a pin

FIGURE 25-1:

COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM

VREF+

AVDD

CVRSS = 1

CVRSS = 0

CVRSRC (DACREFH)

8R

CVR<3:0>

CVREF

CVREN

R

R

R

R

16 Steps

R

R

R

CVREFOUT

CVRCON<CVROE>

CVRR

VREF-

AVSS

8R

CVRSS = 1

CVRSS = 0

 2014-2017 Microchip Technology Inc.

DS60001290E-page 275

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