PCA9558 PHILIPS [NXP Semiconductors], PCA9558 Datasheet - Page 10

• 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
S
8-bit I
latched 6-bit I
SEE FIGURE 2 FOR THE NEEDED COMMAND CODE.
1
SLAVE ADDRESS
0
0
2
S
S
1
C and SMBus I/O port with 5-bit multiplexed/1-bit
1
1
1
SLAVE ADDRESS
SLAVE ADDRESS
0
0
1 A0 0
ACKNOWLEDGE
0
0
FROM SLAVE
R/W
1
1
2
1
1
A
C EEPROM and 2 k bit EEPROM
Figure 12. I
1 A0 0
1 A0 0
0
Figure 13. I
0
ACKNOWLEDGE
ACKNOWLEDGE
COMMAND BYTE
Figure 14. Read from 256 byte EEPROM and write to GPIO registers
FROM SLAVE
FROM SLAVE
R/W
R/W
0
x
A
A
2
x
C page write operation to 256 byte EEPROM; M bytes where M
0
0
2
C read operation from 256 byte EEPROM; M bytes where M
x
0
0
ACKNOWLEDGE
COMMAND CODE
COMMAND CODE
FROM SLAVE
x
0
0
x
0
0
A
0
0
a7
0
0
a6 a5 a4 a3 a2 a1 a0 A
EEPROM ADDRESS
0
1
ACKNOWLEDGE
ACKNOWLEDGE
FROM SLAVE
FROM SLAVE
1
1
A
A
DATA N+1
DATA N
10
ACKNOWLEDGE
FROM SLAVE
EEPROM ADDRESS
EEPROM ADDRESS
AUTO-INCREMENT
AUTO-INCREMENT
WORD ADDRESS
WORD ADDRESS
ACKNOWLEDGE
ACKNOWLEDGE
FROM MASTER
FROM SLAVE
S
A
A
1
0
ACKNOWLEDGE
ACKNOWLEDGE
SLAVE ADDRESS
FROM SLAVE
FROM SLAVE
0
1
A
A
1
S
ACKNOWLEDGE
1 A0
FROM SLAVE
1
0
SLAVE ADDRESS
R/W
DATA N+M
DATA N+M
1
DATA N
0
A
1
1
d7 d6 d5 d4 d3 d2 d1 d0 NA P
SW00644
15
DATA FROM 256EEPROM
1
AUTO-INCREMENT
AUTO-INCREMENT
AUTO-INCREMENT
WORD ADDRESS
WORD ADDRESS
WORD ADDRESS
NO ACKNOWLEDGE
ACKNOWLEDGE
1 A0 1
FROM MASTER
ACKNOWLEDGE
FROM SLAVE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
R/W
NA
A
A
PCA9558
DATA LATCHED INTO
NO ACKNOWLEDGE
P
A
P
GPIO REGISTER
FROM MASTER
SW00642
SW00643
Product data