PCA9558 Просмотр технического описания (PDF) - Philips Electronics

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PCA9558

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM

Philips Electronics 

Philips Semiconductors

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit

latched 6-bit I2C EEPROM and 2 k bit EEPROM

Product data

PCA9558

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

S 1 0 0 1 1 1 A0 0 A 0 0 0 0 0 0 0 1 A

EEPROM ADDRESS

A

SLAVE ADDRESS R/W

COMMAND CODE

DATA N

A

AUTO-INCREMENT

WORD ADDRESS

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

DATA N+1

A

DATA N+M

AP

AUTO-INCREMENT

WORD ADDRESS

AUTO-INCREMENT

WORD ADDRESS

SW00642

Figure 12. I2C page write operation to 256 byte EEPROM; M bytes where M ≤ 15

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

S 1 0 0 1 1 1 A0 0 A 0 0 0 0 0 0 1 1 A

SLAVE ADDRESS R/W

COMMAND CODE

EEPROM ADDRESS

A S 1 0 0 1 1 1 A0 1 A

SLAVE ADDRESS R/W

ACKNOWLEDGE

FROM MASTER

NO ACKNOWLEDGE

FROM MASTER

DATA N

A

DATA N+M

NA P

AUTO-INCREMENT

WORD ADDRESS

AUTO-INCREMENT

WORD ADDRESS

SW00643

Figure 13. I2C read operation from 256 byte EEPROM; M bytes where M ≥ 1

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

NO ACKNOWLEDGE

FROM MASTER

S 1 0 0 1 1 1 A0 0 A 0 0 0 x x x x x A a7 a6 a5 a4 a3 a2 a1 a0 A S 1 0 0 1 1 1 A0 1 A d7 d6 d5 d4 d3 d2 d1 d0 NA P

SLAVE ADDRESS

R/W

COMMAND BYTE

SEE FIGURE 2 FOR THE NEEDED COMMAND CODE.

EEPROM ADDRESS

SLAVE ADDRESS

R/W

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

DATA FROM 256EEPROM

SW00644

DATA LATCHED INTO

GPIO REGISTER

2002 May 24

10

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