PCA9558 PHILIPS [NXP Semiconductors], PCA9558 Datasheet - Page 8

• Manufacturer Part Number: PCA9558
• Description: 8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2002 May 24
8-bit I
latched 6-bit I
See Figure 2 for the proper Command Byte
2
S
S
C and SMBus I/O port with 5-bit multiplexed/1-bit
1
1
SLAVE ADDRESS
SLAVE ADDRESS
0
0
0
0
1
1
2
S
C EEPROM and 2 k bit EEPROM
1
1
1
1 A0 0
1 A0 0
SLAVE ADDRESS
0
ACKNOWLEDGE
ACKNOWLEDGE
FROM SLAVE
FROM SLAVE
R/W
R/W
0
1
A
A
1
0
0
1 A0 0
0
0
COMMAND BYTE
COMMAND BYTE
ACKNOWLEDGE
0
0
FROM SLAVE
R/W
Figure 7. I
Figure 9. I
Figure 8. I
0
0
A
x
1
0
x
1
0
ACKNOWLEDGE
x
ACKNOWLEDGE
0
COMMAND BYTE
2
FROM SLAVE
2
FROM SLAVE
2
C write for GPIO registers
C read of MUX_INx inputs
0
C read for GPIO registers
x
0
0
A
A
x
S
S
8
x
1
1
x
SLAVE ADDRESS
SLAVE ADDRESS
ACKNOWLEDGE
0
0
FROM SLAVE
x
0
0
A
1
1
d7 d6 d5 d4 d3 d2 d1 d0 A
1
1
1 A0 1
1 A0 1
DATA BYTE
ACKNOWLEDGE
ACKNOWLEDGE
FROM SLAVE
FROM SLAVE
R/W
R/W
A
A
d7 d6 d5 d4 d3 d2 d1 d0 NA
0
ACKNOWLEDGE
0
DATA FROM SLAVE
DATA FROM SLAVE
FROM SLAVE
0 d4 d3 d2 d1 d0 NA
SW00637
P
NO ACKNOWLEDGE
NO ACKNOWLEDGE
FROM MASTER
FROM MASTER
SW00638
PCA9558
SW00639
P
P
Product data