PIC16F716 datasheet(22/126 Pages) MICROCHIP

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PIC16F716

DS41206A-page 20

Preliminary

 2003 Microchip Technology Inc.

FIGURE 3-2:

BLOCK DIAGRAM OF

RA4/T0CKI PIN

TABLE 3-1:

PORTA FUNCTIONS

TABLE 3-2:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTA

DATA

BUS

PORT

TRIS

RD PORT

Data Latch

TRIS Latch

RD TRIS

Schmitt

Trigger

Input

Buffer

VSS

RA4/T0CKI

TMR0 Clock Input

VSS

Name

Bit#

Buffer

Function

RA0/AN0

bit 0

TTL

Input/output or analog input

RA1/AN1

bit 1

TTL

Input/output or analog input

RA2/AN2

bit 2

TTL

Input/output or analog input

RA3/AN3/VREF

bit 3

TTL

Input/output or analog input or VREF

RA4/T0CKI

bit 4

Input/output or external clock input for Timer0

Output is open drain type

Legend: TTL = TTL input, ST = Schmitt Trigger input

Address

Name

Bit 7 Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR,

BOR

Value on all

other

Resets

05h

PORTA

—

—(1)

RA4

RA3

RA2

RA1

RA0

--xx 0000

--uu uuuu

85h

TRISA

—

—(1)

PORTA Data Direction Register

--11 1111

9Fh

ADCON1

—

PCFG2 PCFG1 PCFG0

---- -000

Legend: x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by

PORTA.

Note 1:

Reserved bits, do not use.

PIC16F716 Datasheet(PDF) 22 Page - Microchip Technology

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