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OPTION_REG 数据表(PDF) 173 Page - Microchip Technology

部件名 OPTION_REG
功能描述  Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver
PDF  222 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

OPTION_REG 数据表(HTML) 173 Page - Microchip Technology

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FIGURE 27-21:
I2C MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS)
P
9
8
7
6
5
D0
D1
D2
D3
D4
D5
D6
D7
S
A7
A6 A5 A4 A3 A2
A1
SDA
SCL
12
3
4
5
6
7
8
9
12
3
4
5
67
8
9
12
3
4
Bus master
terminates
transfer
ACK
Receiving Data from Slave
Receiving Data from Slave
D0
D1
D2
D3
D4
D5
D6
D7
ACK
R/W
Transmit Address to Slave
SSPIF
BF
ACK is not sent
Write to SSPCON2<0> (SEN = 1),
Write to SSPBUF occurs here,
ACK from Slave
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
PEN bit = 1
written here
Data shifted in on falling edge of CLK
Cleared by software
start XMIT
SEN = 0
SSPOV
SDA = 0, SCLx = 1
while CPU
(SSPSTAT<0>)
ACK
Cleared by software
Cleared by software
Set SSPIF interrupt
at end of receive
Set P bit
(SSPSTAT<4>)
and SSPIF
Cleared in
software
ACK from Master
Set SSPIF at end
Set SSPIF interrupt
at end of Acknowledge
sequence
Set SSPIF interrupt
at end of Acknow-
ledge sequence
of receive
Set ACKEN, start Acknowledge sequence
SSPOV is set because
SSPBUF is still full
SDA = ACKDT = 1
RCEN cleared
automatically
RCEN = 1, start
next receive
Write to SSPCON2<4>
to start Acknowledge sequence
SDA = ACKDT (SSPCON2<5>) = 0
RCEN cleared
automatically
responds to SSPxIF
ACKEN
begin Start condition
Cleared by software
SDA = ACKDT = 0
Last bit is shifted into SSPSR and
contents are unloaded into SSPBUF
RCEN
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
RCEN cleared
automatically
ACK from Master
SDA = ACKDT = 0
RCEN cleared
automatically



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