PIC16HV540 Datasheet, PDF(3/36 Page) Microchip Technology – Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller With On-Chip Voltage Regulator

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PIC16HV540 Datasheet, PDF (3/36 Pages) Microchip Technology – Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller With On-Chip Voltage Regulator

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1.2.7 ENHANCED WATCHDOG TIMER (WDT)

OPERATION

The WDT is enabled by setting FUSE 2 in the conï¬guration

word. The WDT setting is latched and the fuse disabled

during SLEEP mode to reduce current consumption.

If the WDT is disabled by FUSE 2, it can be enabled/dis-

abled under program control using bit 4 in OPTION2

(SWE). The software WDT control is disabled at power-up.

The current consumption of the on-chip oscillator (used

for the watchdog, oscillator startup timer and sleep

timer) is less than 1ÂµA (typical) at 3 Volt operation.

1.2.8 REDUCED EXTERNAL RC OSCILLATOR

STARTUP TIME

If the RC oscillator option is selected in the Conï¬gura-

tion word (FOSC1=1 and FOSCO=1) the oscillator

startup time is 1.0 ms nominal instead of 18 ms nomi-

nal. This is applicable after power-up (POR), either

WDT interrupt or wake-up, external reset on MCLR,

WPC (wake on pin change) and Brown-out.

1.2.9 LOW-VOLTAGE OPERATION OF THE

ENTIRE CPU DURING SLEEP

The voltage regulator can automatically lower the volt-

age to the core from 5 Volt to 3 Volt during sleep, result-

ing in reduced current consumption. This is an option

bit in OPTION2 register.

1.2.10 GLITCH FILTERS ON WAKEUP PINS AND

MCLR

Glitch sensitive inputs for wakeup on pin change are ï¬l-

tered to reduce susceptibility to interference. A similar

ï¬lter reduces false reset on MCLR.

1.2.11 PROGRAMMABLE CLOCK GENERATOR

When used in RC mode the CLKOUT pin can be used

as a programmable clock output. The output is con-

nected to TMR0, bit 0 and by setting the prescaler,

clock out frequencies of CLKIN/8 to CLKIN/1024 can

be generated. The CLKOUT pin can also be used as a

general purpose output by modifying to TMR0, bit 0.

TABLE 1-1: PIC16HV540 DEVICE

PIC16HV540

Clock

Maximum Frequency (MHz)

Memory

EPROM Program Memory

512

RAM Data Memory (bytes)

Peripherals Timer Module(s)

TMR0

Packages I/O Pins

Voltage Range (Volts)

3.5V-15V

Number of Instructions

Packages

18-pin DIP

SOIC

20-pin SSOP

All PICmicroÂ® devices have Power-on Reset, selectable

WDT, selectable code protect and high I/O current capability.

PIC16HV540

2.0 PIC16HV540 DEVICE

VARIETIES

A variety of frequency ranges and packaging options

are available. When placing orders, please use the

PIC16HV540 Product Identiï¬cation System at the back

of this data sheet to specify the correct part number.

2.1 UV Erasable Devices

The UV erasable versions, offered in CERDIP pack-

ages, are optimal for prototype development and pilot

programs.

UV erasable devices can be programmed for any of the

four oscillator conï¬gurations. Microchip's PICSTARTÂ®

and PRO MATEÂ® programmers both support program-

ming of the PIC16HV540. Third party programmers

also are available; refer to Literature Number DS00104

for a list of sources.

2.2 One-Time-Programmable (OTP)

Devices

The availability of OTP devices is especially useful for

customers expecting frequent code changes and

updates.

The OTP devices, packaged in plastic packages, per-

mit the user to program them once. In addition to the

program memory, the conï¬guration bits must be pro-

grammed.

2.3 Quick-Turnaround-Production (QTP)

Devices

Microchip offers a QTP Programming Service for fac-

tory production orders. This service is made available

for users who choose not to program a medium to high

quantity of units and whose code patterns have stabi-

lized. The devices are identical to the OTP devices but

with all EPROM locations and conï¬guration bit options

already programmed by the factory. Certain code and

prototype veriï¬cation procedures apply before produc-

tion shipments are available. Please contact your

Microchip Technology sales ofï¬ce for more details.

2.4 Serialized

Quick-Turnaround-Production

(SQTP) Devices

Microchip offers the unique programming service where

a few user-deï¬ned locations in each device are pro-

grammed with different serial numbers. The serial num-

bers may be random, pseudo-random or sequential.

Serial programming allows each device to have a

unique number which can serve as an entry code,

password or ID number.

Preliminary

DS40197A-page 3

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