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PIC16C55X

EPROM-Based 8-Bit CMOS Microcontrollers

Devices included in this data sheet:

Referred to collectively as PIC16C55X.

• PIC16C554

• PIC16C558

Pin Diagram

PDIP, SOIC, Windowed CERDIP

RA2

RA3

RA4/T0CKI

MCLR/ V

RB0/INT

RB1

RB2

RB3

•1

RA1

RA0

OSC1/CLKIN

OSC2/CLKOUT

RB7

RB6

RB5

RB4

PIC16C55X

High Performance RISC CPU:

• Only 35 instructions to learn

• All single-cycle instructions (200 ns), except for

program branches which are two-cycle

• Operating speed:

- DC - 20 MHz clock input

- DC - 200 ns instruction cycle

Device

PIC16C554

PIC16C558

•

Program

Memory

512

Data

Memory

128

SSOP

RA2

RA3

RA4/T0CKI

MCLR/ V

RB0/INT

RB1

RB2

RB3

•1

RA1

RA0

OSC1/CLKIN

OSC2/CLKOUT

RB7

RB6

RB5

RB4

PIC16C55X

Interrupt capability

16 special function hardware registers

8-level deep hardware stack

Direct, Indirect and Relative addressing modes

Peripheral Features:

• 13 I/O pins with individual direction control

• High current sink/source for direct LED drive

• Timer0: 8-bit timer/counter with 8-bit

programmable prescaler

Special Microcontroller Features (cont’d)

•

Programmable code protection

Power saving SLEEP mode

Selectable oscillator options

Serial in-circuit programming (via two pins)

Four user programmable ID locations

Special Microcontroller Features:

• Power-on Reset (POR)

• Power-up Timer (PWRT) and Oscillator Start-up

Timer (OST)

• Watchdog Timer (WDT) with its own on-chip RC

oscillator for reliable operation

CMOS Technology:

• Low-power, high-speed CMOS EPROM technology

• Fully static design

• Wide operating voltage range

- 2.5V to 5.5V

• Commercial, industrial and extended tempera-

ture range

• Low power consumption

- < 2.0 mA @ 5.0V, 4.0 MHz

- 15

A typical @ 3.0V, 32 kHz

- < 1.0

A typical standby current @ 3.0V

1998 Microchip Technology Inc.

Preliminary

DS40143C-page 1

PIC16C55X

Device Differences

Device

PIC16C554

PIC16C558

Voltage

Range

2.5 - 5.5

Oscillator

See Note 1

Process

Technology

(Microns)

0.9

Note 1:

If you change from this device to another device, please verify oscillator characteristics in your application.

DS40143C-page 2

Preliminary

1998 Microchip Technology Inc.

PIC16C55X

Table of Contents

1.0

General Description......................................................................................................................................................................5

2.0

PIC16C55X Device Varieties .......................................................................................................................................................7

3.0

Architectural Overview .................................................................................................................................................................9

4.0

Memory Organization ................................................................................................................................................................ 13

5.0

I/O Ports .................................................................................................................................................................................... 23

6.0

Timer0 Module .......................................................................................................................................................................... 29

7.0

Special Features of the CPU..................................................................................................................................................... 35

8.0

Instruction Set Summary ........................................................................................................................................................... 51

9.0

Development Support................................................................................................................................................................ 63

10.0 Electrical Specifications............................................................................................................................................................. 69

11.0 Packaging Information............................................................................................................................................................... 81

Appendix A:

Enhancements............................................................................................................................................................ 87

Appendix B:

Compatibility ............................................................................................................................................................... 87

INDEX .................................................................................................................................................................................................. 89

PIC16C55X Product Identification System .......................................................................................................................................... 93

To Our Valued Customers

Most Current Data Sheet

To obtain the most up-to-date version of this data sheet, please check our Worldwide Web site at:

http://www.microchip.com

You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.

The last character of the literature number is the version number. e.g., DS30000A is version A of document DS30000.

Errata

An errata sheet may exist for current devices, describing minor operational differences (from the data sheet) and recommended

workarounds. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revi-

sion of silicon and revision of document to which it applies.

To determine if an errata sheet exists for a particular device, please check with one of the following:

• Microchip’s Worldwide Web site; http://www.microchip.com

• Your local Microchip sales ofﬁce (see last page)

• The Microchip Corporate Literature Center; U.S. FAX: (602) 786-7277

When contacting a sales ofﬁce or the literature center, please specify which device, revision of silicon and data sheet (include lit-

erature number) you are using.

Corrections to this Data Sheet

We constantly strive to improve the quality of all our products and documentation. We have spent a great deal of time to ensure

that this document is correct. However, we realize that we may have missed a few things. If you ﬁnd any information that is missing

or appears in error, please:

• Fill out and mail in the reader response form in the back of this data sheet.

• E-mail us at webmaster@microchip.com.

We appreciate your assistance in making this a better document.

1998 Microchip Technology Inc.

Preliminary

DS40143C-page 3

PIC16C55X

NOTES:

DS40143C-page 4

Preliminary

1998 Microchip Technology Inc.

PIC16C55X

1.0

GENERAL DESCRIPTION

The PIC16C55X are 18 and 20-Pin EPROM-based

members of the versatile PIC16CXX family of low-cost,

high-performance,

CMOS,

fully-static,

8-bit

microcontrollers.

All PICmicro

microcontrollers employ an advanced

RISC architecture. The PIC16C55X have enhanced

core features, eight-level deep stack, and multiple inter-

nal 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 single-cycle,

except for program branches (which require two

cycles). A total of 35 instructions (reduced instruction

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

some of the architectural innovations used to achieve a

very high performance.

PIC16C55X microcontrollers typically achieve a 2:1

code compression and a 4:1 speed improvement over

other 8-bit microcontrollers in their class.

The PIC16C554 has 80 bytes of RAM. The PIC16C558

has 128 bytes of RAM. Each device has 13 I/O pins and

an 8-bit timer/counter with an 8-bit programmable pres-

caler.

PIC16C55X 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 reset.

A highly reliable Watchdog Timer with its own on-chip

RC oscillator provides protection against software

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.

Table 1-1 shows the features of the PIC16C55X

mid-range microcontroller families.

A simpliﬁed block diagram of the PIC16C55X is shown

in Figure 3-1.

The PIC16C55X series ﬁt perfectly in applications

ranging from motor control to low-power remote sen-

sors. The EPROM technology makes customization of

application programs (detection levels, pulse genera-

tion, 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 PIC16C55X 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

PIC16C55X family of devices (Appendix B).

The PIC16C55X family ﬁlls the niche for users wanting

to migrate up from the PIC16C5X family and not need-

ing various peripheral features of other members of the

PIC16XX mid-range microcontroller family.

1.2

Development Support

The PIC16C55X family is supported by a full-featured

macro assembler, a software simulator, an in-circuit

emulator, a low-cost development programmer and a

full-featured programmer. A “C” compiler and fuzzy

logic support tools are also available.

1998 Microchip Technology Inc.

Preliminary

DS40143C-page 5

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