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

28.3 On-Chip Voltage Regulator

All PIC32MX1XX/2XX/5XX 64/100-pin devices’ core

and digital logic are designed to operate at a nominal

1.8V. To simplify system designs, most devices in the

PIC32MX1XX/2XX/5XX 64/100-pin family incorporate

an on-chip regulator providing the required core logic

voltage from VDD.

A low-ESR capacitor (such as tantalum) must be

connected to the VCAP pin (see Figure 28-1). This

helps to maintain the stability of the regulator. The

recommended value for the filter capacitor is provided

in Section 31.1 “DC Characteristics”.

Note:

It is important that the low-ESR capacitor

is placed as close as possible to the VCAP

pin.

28.3.1 HIGH VOLTAGE DETECT (HVD)

The HVD module monitors the core voltage at the VCAP

pin. If a voltage above the required level is detected on

VCAP, the I/O pins are disabled and the device is held

in Reset as long as the HVD condition persists. See

parameter HV10 (VHVD) in Table 31-11 in Section 31.1

“DC Characteristics” for more information.

28.3.2 ON-CHIP REGULATOR AND POR

It takes a fixed delay for the on-chip regulator to generate

an output. During this time, designated as TPU, code

execution is disabled. TPU is applied every time the

device resumes operation after any power-down,

including Sleep mode.

28.3.3 ON-CHIP REGULATOR AND BOR

PIC32MX1XX/2XX/5XX 64/100-pin devices also have

a simple brown-out capability. If the voltage supplied to

the regulator is inadequate to maintain a regulated

level, the regulator Reset circuitry will generate a

Brown-out Reset. This event is captured by the BOR

flag bit (RCON<1>). The brown-out voltage levels are

specific in Section 31.1 “DC Characteristics”.

FIGURE 28-1:

CONNECTIONS FOR THE

ON-CHIP REGULATOR

3.3V(1)

PIC32

VDD

CEFC(2,3)

(10 F typ)

VCAP

VSS

Note 1:

2:

3:

These are typical operating voltages. Refer to

Section 31.1 “DC Characteristics” for the full

operating ranges of VDD.

It is important that the low-ESR capacitor is

placed as close as possible to the VCAP pin.

The typical voltage on the VCAP pin is 1.8V.

28.4 Programming and Diagnostics

PIC32MX1XX/2XX/5XX 64/100-pin devices provide a

complete range of programming and diagnostic fea-

tures that can increase the flexibility of any application

using them. These features allow system designers to

include:

• Simplified field programmability using two-wire 

In-Circuit Serial Programming™ (ICSP™)

interfaces

• Debugging using ICSP

• Programming and debugging capabilities using

the EJTAG extension of JTAG

• JTAG boundary scan testing for device and board

diagnostics

PIC32 devices incorporate two programming and diag-

nostic modules that provide a range of functions to the

application developer.

FIGURE 28-2:

BLOCK DIAGRAM OF

PROGRAMMING,

DEBUGGING AND TRACE

PORTS

PGEC1

PGED1

PGEC3

PGED3

TDI

TDO

TCK

TMS

ICSP™

Controller

ICESEL

JTAG

Controller

JTAGEN DEBUG<1:0>

Core

DS60001290E-page 302

 2014-2017 Microchip Technology Inc.

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