PIC16C717-I/SS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C717-I/SS

18/20-Pin, 8-Bit CMOS Microcontrollers with 10/12-Bit A/D

Microchip Technology 

PIC16C717/770/771

FIGURE 9-9: I2C WAVEFORMS FOR RECEPTION (7-BIT ADDRESS)

SDA

Receiving Address

R/W=0

ACK

Receiving Data

ACK

Receiving Data

Not

ACK

A7 A6 A5 A4 A3 A2 A1

D7 D6 D5 D4 D3 D2 D1 D0

D7 D6 D5 D4 D3 D2 D1 D0

SCL S 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

P

SSPIF

BF (SSPSTAT<0>)

SSPOV (SSPCON<6>)

Cleared in software

SSPBUF register is read

Bit SSPOV is set because the SSPBUF register is still full.

ACK is not sent.

Bus Master

terminates

transfer

FIGURE 9-10: I2C WAVEFORMS FOR TRANSMISSION (7-BIT ADDRESS)

Receiving Address

R/W = 1

ACK

R/W = 0

Transmitting Data Not ACK

SDA

A7 A6 A5 A4 A3 A2 A1

D7 D6 D5 D4 D3 D2 D1 D0

SCL

S

1 23456789

1 2 34 56 789

Data in

SCL held low

P

sampled

while CPU

responds to SSPIF

SSPIF

BF (SSPSTAT<0>)

cleared in software

From SSP interrupt

SSPBUF is written in software service routine

CKP (SSPCON<4>)

Set bit after writing to SSPBUF

(the SSPBUF must be written-to

before the CKP bit can be set)

DS41120A-page 80

Advanced Information

© 1999 Microchip Technology Inc.

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