Philips Semiconductors

Product data

PCA9558

2002 May 24

10

S

100111 A0

0

A

00000001

A

A

R/W

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

DATA N+M

P

A

ACKNOWLEDGE

FROM SLAVE

EEPROM ADDRESS

DATA N

A

ACKNOWLEDGE

FROM SLAVE

AUTO-INCREMENT

WORD ADDRESS

AUTO-INCREMENT

WORD ADDRESS

DATA N+1

A

ACKNOWLEDGE

FROM SLAVE

AUTO-INCREMENT

WORD ADDRESS

SW00642

SLAVE ADDRESS

COMMAND CODE

≤ 15

S

100111 A0

0

A

00000011

A

A

R/W

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

DATA N+M

P

NA

NO ACKNOWLEDGE

FROM MASTER

EEPROM ADDRESS

AUTO-INCREMENT

WORD ADDRESS

DATA N

A

ACKNOWLEDGE

FROM MASTER

AUTO-INCREMENT

WORD ADDRESS

S

100111 A0

1A

R/W

ACKNOWLEDGE

FROM SLAVE

SW00643

SLAVE ADDRESS

COMMAND CODE

SLAVE ADDRESS

≥ 1

SW00644

S

100111 A0 0

A

A

SLAVE ADDRESS

R/W

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

COMMAND BYTE

EEPROM ADDRESS

a7

ACKNOWLEDGE

FROM SLAVE

SLAVE ADDRESS

0

0

0

x

xxxx

a6 a5 a4 a3 a2 a1 a0 A

1

A

ACKNOWLEDGE

FROM SLAVE

DATA FROM 256EEPROM

d7 d6 d5 d4 d3 d2 d1 d0 NA P

NO ACKNOWLEDGE

FROM MASTER

S

100

111 A0

R/W

DATA LATCHED INTO

GPIO REGISTER

SEE FIGURE 2 FOR THE NEEDED COMMAND CODE.

Figure 14. Read from 256 byte EEPROM and write to GPIO registers