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PIC16F721-ISS

20-Pin Flash Microcontrollers

Microchip Technology 

PIC16(L)F720/721

FIGURE 1-1:

20-PIN DEVICE BLOCK DIAGRAM FOR PIC16F720/721

Configuration

Flash

P8rKogxra1m4

MPermogorraym(1)

Memory

Program

Bus

14

IInnssttrruuccttiioonn Rreegg

13

Program Counter

Data Bus

8

8 Level Stack

(13-bit)

RAM

File

RReeggiisstteerrss(1)

368 x 8

RAM Addr

9

Addr MUX

Direct Addr 7

Indirect

8 Addr

FFSSRR Rreegg

PORTA

PORTB

SSTTAATTUUSS Rreegg

PORTC

8

CLKIN

CLKOUT

Instruction

Decode &

Control

Timing

Generation

Internal

Oscillator

Block

Power-up

Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

LDO

Regulator

3

MUX

ALU

8

WW Rreegg

MCLR VDD VSS

CCP1

CCP1

PMDATL

Self read/

write Flash

memory

PMADRL

RA0

RA1

RA2

RA3

RA4

RA5

RB4

RB5

RB6

RB7

RC0

RC1

RC2

RC3

RC4

RC5

RC6

RC7

T0CKI

T1G T1CKI

TX/CK RX/DT

ICSPDAT

ICSPCLK

SDI/ SCK/

SDO SDA SCL SS

Timer0

Timer1

Timer2

AUSART

AICUSPA™RT

Synchronous

Serial Port

Analog-To-Digital Converter

AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7 AN8 AN9 AN10 AN11

Note: PIC16(L)F720 – 2k x 14 Flash, 128 x 8 RAM

PIC16(L)F721 – 4k x 14 Flash, 256 x 8 RAM.

DS41430D-page 8

 2010-2013 Microchip Technology Inc.

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