PCA9561D Ver la hoja de datos (PDF) - Philips Electronics
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PCA9561D Datasheet PDF : 17 Pages
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Philips Semiconductors
Quad 6-bit multiplexed I2C EEPROM DIP switch
Product data sheet
PCA9561
Bus Transactions
Data is transmitted to the PCA9561 registers using Write Byte transfers (see Figures 7 and 8). Data is read from the PCA9561 registers using
Read and Receive Byte transfers (see Figure 9).
slave address
control register
write on EEPROM byte 0
EEPROM byte 0 data
S 1 0 0 1 1 A1 A0 0 A 0 0 0 0 0 0 0 0 A X X D5 D4 D3 D2 D1 D0 A P
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
stop condition
Figure 7. WRITE on 1 EEPROM — assuming WP = 0
SW00956
slave address
control register write on
EEPROM byte 0
EEPROM byte 0 data
EEPROM byte 1 data
S 1 0 0 1 1 A1 A0 0 A 0 0 0 0 0 0 0 0 A X X D5 D4 D3 D2 D1 D0 A X X D5 D4 D3 D2 D1 D0 A P
start condition
R/W
acknowledge
from slave
acknowledge
from slave
stop condition
Figure 8. WRITE on 2 EEPROMs — assuming WP = 0
SW00957
slave address
control register read
MUX_IN values
slave address
data from MUX_IN
S 1 0 0 1 1 A1 A0 0 A 1 1 1 1 1 1 1 1 A S 1 0 0 1 1 A1 A0 1 A 0 0 0 4 3 2 1 0 NA P
start condition
R/W
acknowledge
from master
restart
acknowledge
from master
R/W
acknowledge
from master
no acknowledge
from master
Figure 9. READ MUX_IN register
stop condition
SW00958
2004 May 17
9
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