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PIC16C72 SERIES

8-Bit CMOS Microcontrollers with A/D Converter

Devices included:

• PIC16C72

• PIC16CR72

Pin Diagrams

SDIP, SOIC, SSOP,

Windowed Side Brazed Ceramic

MCLR/V

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/V

REF

RA4/T0CKI

RA5/SS/AN4

OSC1/CLKIN

OSC2/CLKOUT

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

•1

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0/INT

RC7

RC6

RC5/SDO

RC4/SDI/SDA

Microcontroller Core Features:

• High-performance RISC CPU

• Only 35 single word instructions to learn

• All single cycle instructions except for program

branches which are two cycle

• Operating speed: DC - 20 MHz clock input

DC - 200 ns instruction cycle

• 2K x 14 words of Program Memory,

128 x 8 bytes of Data Memory (RAM)

• Interrupt capability

• Eight level deep hardware stack

• Direct, indirect, and relative addressing modes

• 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

• Programmable code-protection

• Power saving SLEEP mode

• Selectable oscillator options

• Low-power, high-speed CMOS technology

• Fully static design

• Wide operating voltage range:

- 2.5V to 6.0V (PIC16C72)

- 2.5V to 5.5V (PIC16CR72)

• High Sink/Source Current 25/25 mA

• Commercial, Industrial and Extended temperature

ranges

• Low-power consumption:

- < 2 mA @ 5V, 4 MHz

- 15

A

typical @ 3V, 32 kHz

- < 1

A

typical standby current

PIC16C72

PIC16CR72

Peripheral Features:

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

• Timer1: 16-bit timer/counter with prescaler,

can be incremented during sleep via external

crystal/clock

• Timer2: 8-bit timer/counter with 8-bit period

• Capture, Compare, PWM (CCP) module

- Capture is 16-bit, max. resolution is 12.5 ns

- Compare is 16-bit, max. resolution is 200 ns

- PWM max. resolution is 10-bit

• 8-bit 5-channel analog-to-digital converter

• Synchronous Serial Port (SSP) with

SPI and I



• Brown-out detection circuitry for

Brown-out Reset (BOR)



1998-2013 Microchip Technology Inc.

Preliminary

DS39016B-page 1

PIC16C72 Series

Table of Contents

1.0 Device Overview .......................................................................................................................................................................... 3

2.0 Memory Organization ................................................................................................................................................................... 5

3.0 I/O Ports ..................................................................................................................................................................................... 19

4.0 Timer0 Module ........................................................................................................................................................................... 25

5.0 Timer1 Module ........................................................................................................................................................................... 27

6.0 Timer2 Module ........................................................................................................................................................................... 31

7.0 Capture/Compare/PWM (CCP) Module ..................................................................................................................................... 33

8.0 Synchronous Serial Port (SSP) Module ..................................................................................................................................... 39

9.0 Analog-to-Digital Converter (A/D) Module .................................................................................................................................. 53

10.0 Special Features of the CPU ...................................................................................................................................................... 59

11.0 Instruction Set Summary ............................................................................................................................................................ 73

12.0 Development Support................................................................................................................................................................. 75

13.0 Electrical Characteristics - PIC16C72 Series ............................................................................................................................. 77

14.0 DC and AC Characteristics Graphs and Tables - PIC16C72 ..................................................................................................... 97

15.0 DC and AC Characteristics Graphs and Tables - PIC16CR72 ................................................................................................ 107

16.0 Packaging Information.............................................................................................................................................................. 109

Appendix A: What’s New in this Data Sheet .................................................................................................................................. 115

Appendix B: What’s Changed in this Data Sheet ........................................................................................................................... 115

Appendix C: Device Differences..................................................................................................................................................... 115

Index .................................................................................................................................................................................................. 117

On-Line Support................................................................................................................................................................................. 121

Reader Response .............................................................................................................................................................................. 122

PIC16C72 Series Product Identification System................................................................................................................................ 125

Sales and Support.............................................................................................................................................................................. 125

To Our Valued Customers

We constantly strive to improve the quality of all our products and documentation. We have spent an exceptional

amount of time to ensure that these documents are 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 use the reader response form in the

back of this data sheet to inform us. We appreciate your assistance in making this a better document.

Key Reference Manual Features

Operating Frequency

Resets

Program Memory - (14-bit words)

Data Memory - RAM (8-bit bytes)

Interrupts

I/O Ports

Timers

Capture/Compare/PWM Modules

Serial Communications

8-Bit A/D Converter

Instruction Set (No. of Instructions)

PIC16C72

DC - 20MHz

POR, PWRT, OST, BOR

2K (EPROM)

128

PortA, PortB, PortC

Timer0, Timer1, Timer2

Basic SSP

5 channels

PIC16CR72

DC - 20MHz

POR, PWRT, OST, BOR

2K (ROM)

128

PortA, PortB, PortC

Timer0, Timer1, Timer2

SSP

5 channels

DS39016B-page 2

Preliminary



1998-2013 Microchip Technology Inc.

PIC16C72 Series

1.0

DEVICE OVERVIEW

This document contains device-specific information for

the operation of the PIC16C72 device. Additional infor-

mation may be found in the PIC

Mid-Range MCU Ref-

erence Manual (DS33023) which may be downloaded

from the Microchip website. The Reference Manual

should be considered a complementary document to

this data sheet, and is highly recommended reading for

a better understanding of the device architecture and

operation of the peripheral modules.

The PIC16C72 belongs to the Mid-Range family of the

PIC devices. A block diagram of the device is shown in

Figure 1-1.

The program memory contains 2K words which trans-

late to 2048 instructions, since each 14-bit program

memory word is the same width as each device instruc-

tion. The data memory (RAM) contains 128 bytes.

There are also 22 I/O pins that are user-configurable on

a pin-to-pin basis. Some pins are multiplexed with other

device functions. These functions include:

•

External interrupt

Change on PORTB interrupt

Timer0 clock input

Timer1 clock/oscillator

Capture/Compare/PWM

A/D converter

SPI/I

Table 1-1 details the pinout of the device with descrip-

tions and details for each pin.

FIGURE 1-1:

PIC16C72/CR72 BLOCK DIAGRAM

EPROM/

ROM

Program

Memory

2K x 14

Program Counter

Data Bus

PORTA

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/V

REF

RA4/T0CKI

RA5/SS/AN4

PORTB

8 Level Stack

(13-bit)

RAM

File

Registers

128 x 8

RAM Addr

(1)

Program

Bus

Instruction reg

Direct Addr

Addr MUX

Indirect

Addr

RB0/INT

RB7:RB1

FSR reg

STATUS reg

PORTC

Power-up

Timer

Instruction

Decode &

Control

Timing

Generation

OSC1/CLKIN

OSC2/CLKOUT

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

MUX

ALU

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

RC4/SDI/SDA

RC5/SDO

RC6

RC7

W reg

MCLR

, V

Timer0

Timer1

Timer2

A/D

Synchronous

Serial Port

CCP1

Note 1:

Higher order bits are from the STATUS register.



1998-2013 Microchip Technology Inc.

Preliminary

DS39016B-page 3

PIC16C72 Series

TABLE 1-1

Pin Name

OSC1/CLKIN

OSC2/CLKOUT

PIC16C72/CR72 PINOUT DESCRIPTION

Pin#

I/O/P

Type

Buffer

Type

Description

ST/CMOS

(3)

Oscillator crystal input/external clock source input.

—

Oscillator crystal output. Connects to crystal or resonator in crystal

oscillator mode. In RC mode, the OSC2 pin outputs CLKOUT which

has 1/4 the frequency of OSC1, and denotes the instruction cycle rate.

Master clear (reset) input or programming voltage input. This pin is an

active low reset to the device.

PORTA is a bi-directional I/O port.

RA0 can also be analog input0.

RA1 can also be analog input1.

RA2 can also be analog input2.

RA3 can also be analog input3 or analog reference voltage

RA4 can also be the clock input to the Timer0 module. Output is

open drain type.

RA5 can also be analog input4 or the slave select for the

synchronous serial port.

PORTB is a bi-directional I/O port. PORTB can be software

programmed for internal weak pull-up on all inputs.

MCLR/V

I/P

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/V

REF

RA4/T0CKI

RA5/SS/AN4

I/O

TTL

RB0/INT

RB1

RB2

RB3

RB4

RB5

RB6

RB7

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

RC4/SDI/SDA

RC5/SDO

RC6

RC7

Legend: I = input

8, 19

I/O

TTL/ST

(1)

TTL

TTL/ST

(2)

TTL/ST

(2)

—

RB0 can also be the external interrupt pin.

Interrupt on change pin.

Interrupt on change pin. Serial programming clock.

Interrupt on change pin. Serial programming data.

PORTC is a bi-directional I/O port.

RC0 can also be the Timer1 oscillator output or Timer1 clock

input.

RC1 can also be the Timer1 oscillator input.

RC2 can also be the Capture1 input/Compare1 output/PWM1

output.

RC3 can also be the synchronous serial clock input/output for both

SPI and I

C modes.

RC4 can also be the SPI Data In (SPI mode) or

data I/O (I

C mode).

RC5 can also be the SPI Data Out (SPI mode).

Ground reference for logic and I/O pins.

Positive supply for logic and I/O pins.

O = output

I/O = input/output

P = power

— = Not used

TTL = TTL input

ST = Schmitt Trigger input

Note 1:

This buffer is a Schmitt Trigger input when configured as the external interrupt.

This buffer is a Schmitt Trigger input when used in serial programming mode.

This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise

DS39016B-page 4

Preliminary



1998-2013 Microchip Technology Inc.

PIC16C72 Series

2.0

MEMORY ORGANIZATION

FIGURE 2-1:

There are two memory blocks in PIC16C72 Series

devices. These are the program memory and the data

memory. Each block has its own bus, so that access to

both blocks can occur during the same oscillator cycle.

The data memory can further be broken down into the

general purpose RAM and the Special Function

Registers (SFRs). The operation of the SFRs that

control the “core” are described here. The SFRs used

to control the peripheral modules are described in the

section discussing each individual peripheral module.

Additional information on device memory may be found

in the PIC

Mid-Range Reference Manual, DS33023.

PROGRAM MEMORY MAP

AND STACK

PC<12:0>

CALL, RETURN

RETFIE, RETLW

Stack Level 1

Stack Level 8

Reset Vector

0000h

2.1

Program Memory Organization

User Memory

Space

Interrupt Vector

0004h

0005h

PIC16C72 Series devices have a 13-bit program coun-

ter capable of addressing a 2K x 14 program memory

space. The address range for this program memory is

0000h - 07FFh. Accessing a location above the physi-

cally implemented address will cause a wraparound.

The reset vector is at 0000h and the interrupt vector is

at 0004h.

On-chip Program

Memory

07FFh

0800h

1FFFh



1998-2013 Microchip Technology Inc.

Preliminary

DS39016B-page 5