PIC16F72 Datasheet, PDF (7/136 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH MCU with A/D Converter

PIC16F72
1.0 DEVICE OVERVIEW
This document contains device specific information for
the operation of the PIC16F72 device. Additional infor-
mation may be found in the PICmicro™ Mid-Range
MCU Reference Manual (DS33023), which may be
downloaded from the Microchip website. The Refer-
ence Manual should be considered a complementary
document to this data sheet, and is highly recom-
mended reading for a better understanding of the
device architecture and operation of the peripheral
modules.
The PIC16F72 belongs to the Mid-Range family of the
PICmicro 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
instruction. The data memory (RAM) contains 128 bytes.
There are 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/I²C
Table 1-1 details the pinout of the device with
descriptions and details for each pin.
FIGURE 1-1:
PIC16F72 BLOCK DIAGRAM
FLASH
Program
Memory
2K x 14
Program
Bus
14
Instruction reg
13
Program Counter
Data Bus
8
8-Level Stack
(13-bit)
RAM
File
Registers
128 x 8
RAM Addr⁽¹⁾
9
Addr MUX
Direct Addr ⁷
Indirect
8 _Addr
FSR reg
STATUS reg
8
Instruction
Decode &
Control
OSC1/CLKI
OSC2/CLKO
Timing
Generation
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
3
MUX
ALU
8
W reg
PORTA
PORTB
PORTC
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3/VREF
RA4/T0CKI
RA5/AN4/SS
RB0/INT
RB1
RB2
RB3
RB4
RB5
RB6/PGC
RB7/PGD
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6
RC7
Timer0
MCLR VDD, VSS
Timer1
Timer2
Synchronous
A/D
Serial Port
CCP1
Note 1: Higher order bits are from the STATUS register.
 2002 Microchip Technology Inc.
DS39597B-page 5