PIC16C641-04ESLASHTQ datasheet(5/136 Pages) MICROCHIP

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Preliminary

DS30559A-page 5

PIC16C64X & PIC16C66X

1.0

GENERAL DESCRIPTION

PIC16C64X & PIC16C66X devices are 28-pin and

40-pin EPROM-based members of the versatile

PIC16CXXX family of low-cost, high-performance,

CMOS, fully-static, 8-bit microcontrollers.

All PIC16/17 microcontrollers employ an advanced

RISC

architecture. The

PIC16CXXX

family

has

enhanced core features, eight-level deep stack, and

multiple internal and external interrupt sources. The

separate instruction and data buses of the Harvard

architecture allow a 14-bit wide instruction word with

the separate 8-bit wide data. The two-stage instruction

pipeline allows all instructions to execute in a sin-

gle-cycle, except for program branches (which require

two cycles). A total of 35 instructions (reduced instruc-

tion set) are available. Additionally, a large register set

gives some of the architectural innovations used to

achieve a very high performance.

PIC16CXXX microcontrollers typically achieve a 2:1

code compression and a 4:1 speed improvement over

other 8-bit microcontrollers in its class.

The PIC16C641 has 128 bytes of RAM and the

PIC16C642 has 176 bytes of RAM. Both devices have

22 I/O pins, and an 8-bit timer/counter with an 8-bit pro-

grammable prescaler. In addition, they have two analog

comparators with a programmable on-chip voltage ref-

erence module. Program Memory has internal parity

error detection circuitry with a Parity Error Reset. The

comparator module is ideally suited for applications

requiring a low-cost analog interface (e.g., battery

chargers,

threshold

detectors,

white

goods

controllers, etc.).

The PIC16C661 has 128 bytes of RAM and the

PIC16C662 has 176 bytes of RAM. Both devices have

33 I/O pins, and an 8-bit timer/counter with an 8-bit pro-

grammable prescaler. They also have an 8-bit Parallel

Slave Port. In addition, the devices have two analog

comparators with a programmable on-chip voltage ref-

erence module. Program Memory has internal parity

error detection circuitry with a Parity Error Reset. The

comparator module is ideally suited for applications

requiring a low-cost analog interface (e.g., battery

chargers,

threshold

detectors,

white

goods

controllers, etc.).

PIC16CXXX devices have special features to reduce

external components, thus reducing cost, enhancing

system reliability and reducing power consumption.

There are four oscillator options, of which the single pin

RC oscillator provides a low-cost solution, the LP

oscillator minimizes power consumption, XT is a

standard crystal, and the HS is for High Speed crystals.

The SLEEP (power-down) mode offers power saving.

The user can wake-up the chip from SLEEP through

several external and internal interrupts and resets.

A highly reliable Watchdog Timer (WDT) with its own

on-chip RC oscillator provides protection against soft-

ware lock-up.

A UV-erasable CERDIP-packaged version is ideal for

code development while the cost-effective One-Time

Programmable (OTP) version is suitable for production

in any volume.

The PIC16CXXX series ﬁt perfectly in applications

ranging from battery chargers to low-power remote

sensors.

The

EPROM

technology

makes

customization of application programs (detection

levels, pulse generation, timers, etc.) extremely fast

and convenient. The small footprint packages make

this microcontroller series perfect for all applications

with

space

limitations.

Low-cost,

low-power,

high-performance, ease of use, and I/O ﬂexibility make

the PIC16C64X & PIC16C66X very versatile.

1.1

Family and Upward Compatibility

Those users familiar with the PIC16C5X family of

microcontrollers will realize that this is an enhanced

version of the PIC16C5X architecture. Please refer to

Appendix A for a detailed list of enhancements. Code

written for PIC16C5X can be easily ported to the

PIC16C64X & PIC16C66X (Appendix B).

1.2

Development Support

PIC16C64X & PIC16C66X devices are supported by

the complete line of Microchip Development tools,

including:

• MPLAB Integrated Development Environment

including MPLAB-Simulator.

• MPASM Universal Assembler and MPLAB-C Uni-

versal C compiler.

• PRO MATE II and PICSTART Plus device pro-

grammers.

• PICMASTER In-circuit Emulator System

•

fuzzyTECH-MP Fuzzy Logic Development Tools

• DriveWay Visual Programming Tool

Please refer to Section 11.0 for more details about

these and other Microchip development tools.

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