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PCF8584 Datasheet(PDF) 19 Page - NXP Semiconductors

Part # PCF8584
Description  I2C-bus controller
Download  40 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8584 Datasheet(HTML) 19 Page - NXP Semiconductors

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1997 Oct 21
19
Philips Semiconductors
Product specification
I2C-bus controller
PCF8584
Fig.9 Slave receiver/slave transmitter modes.
handbook, full pagewidth
START
read byte from S1 register
END
TX
A0 = HIGH
A0 = LOW
addressed as slave
(AAS = 1?)
no
yes
read byte from S1 register
PIN bit = 0?
yes
no
read byte from S0 register
read or write?
(LSB = 1 or 0?)
read byte from S1 register
PIN bit = 0?
R/W = 1
SLAVE
TRANSMITTER
MODE
no
yes
negative
ACK received?
(LRB = 1?)
yes
no
write last data byte
to S0 register
A0 = HIGH
A0 = LOW
END
RX
read byte from S1 register
PIN bit = 0?
R/W = 0
SLAVE
RECEIVER
MODE
no
yes
STOP detected?
(STS = 1?)
yes
no
read last data byte
from S0 register
write data to S0 register
read data from S0 register
PIN deactivated
(set to '1')
PCF8584 goes into
slave receiver
mode
Read incoming address to
determine if the R/W bit is 0 or 1
This will differentiate between
slave receiver or slave
transmitter modes.
Check that 'own address'
has arrived correctly
Check whether
'addressed as slave'
MBE713


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