PIC16F1508TESSQTO datasheet(221/384 Pages) MICROCHIP

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A7 A6 A5 A4 A3 A2 A1

SDAx

SCLx

Bus master

terminates

transfer

ACK

Receiving Data from Slave

ACK

R/W

Transmit Address to Slave

SSPxIF

ACK is not sent

Write to SSPxCON2<0>(SEN = 1),

Write to SSPxBUF occurs here,

ACK from Slave

Master configured as a receiver

by programming SSPxCON2<3> (RCEN = 1)

PEN bit = 1

written here

Data shifted in on falling edge of CLK

Cleared by software

start XMIT

SEN = 0

SSPOV

SDAx = 0, SCLx = 1

while CPU

(SSPxSTAT<0>)

ACK

Cleared by software

Set SSPxIF interrupt

at end of receive

Set P bit

(SSPxSTAT<4>)

and SSPxIF

Cleared in

software

ACK from Master

Set SSPxIF at end

Set SSPxIF interrupt

at end of Acknowledge

sequence

Set SSPxIF interrupt

at end of Acknow-

ledge sequence

of receive

Set ACKEN, start Acknowledge sequence

SSPOV is set because

SSPxBUF is still full

SDAx = ACKDT = 1

RCEN cleared

automatically

RCEN = 1, start

next receive

Write to SSPxCON2<4>

to start Acknowledge sequence

SDAx = ACKDT (SSPxCON2<5>) = 0

RCEN cleared

automatically

responds to SSPxIF

ACKEN

begin Start condition

Cleared by software

SDAx = ACKDT = 0

Last bit is shifted into SSPxSR and

contents are unloaded into SSPxBUF

RCEN

Master configured as a receiver

by programming SSPxCON2<3> (RCEN = 1)

RCEN cleared

automatically

ACK from Master

SDAx = ACKDT = 0

RCEN cleared

automatically

PIC16F1508TESSQTO Datasheet(PDF) 221 Page - Microchip Technology

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