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8598C-2

1024 × 8-bit CMOS EEPROM with I2C-bus interface

Philips Electronics 

Philips Semiconductors

PCF8598C-2

1024 × 8-bit CMOS EEPROM with I2C-bus interface

8.1.5 Read operations

Read operations are initiated in the same manner as write operations with the

exception that the LSB of the slave address is set to logic 1.

There are three basic read operations: current address read, random read, and

sequential read.

Remark: The lower 8 bits of the word address are incremented after each

transmission of a data byte (read or write). The MSB of the word address, which is

defined in the slave address, is not changed when the word address count overflows.

Thus, the word address overflows from 255 to 0, and from 511 to 256.

acknowledge

from slave

acknowledge

from slave

acknowledge

from slave

acknowledge

from master

S SLAVE ADDRESS 0 A WORD ADDRESS A S SLAVE ADDRESS 1 A

R/W

at this moment master

R/W

transmitter becomes

master receiver and

EEPROM slave receiver

becomes slave transmitter

DATA

A

n bytes

auto increment

word address

no acknowledge

from master

DATA

1P

MBA703

last byte

auto increment

word address

Fig 7. Master reads PCF8598C-2 slave after setting word address (write word address; read data);

sequential read.

acknowledge

from slave

acknowledge

from master

no acknowledge

from master

S SLAVE ADDRESS 1 A

DATA

A

DATA

1P

R/W

n bytes

auto increment

word address

last bytes

auto increment

word address

MBA704 - 1

Fig 8. Master reads PCF8598C-2 immediately after first byte (read mode); current address read.

9397 750 14219

Product data

Rev. 06 — 22 October 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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