Philips Semiconductors

PCF85116-3

2048

Product data

Rev. 04 — 25 October 2004

8 of 21

9397 750 14217

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

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 (R/W) is set to logic 1.

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

sequential read.

Remark: During read operations all bits of the memory address are incremented

after each transmission of a data byte. Contrary to write operations, an overflow of the

memory address occurs from 2047 to 0 (see Figure 8).

Fig 6.

Page write operation; 32 bytes.

S1 0 1 0

0

B1

B2

B3

A

WORD ADDRESS

A

A

DATA N

acknowledge

from slave

acknowledge

from slave

acknowledge

from slave

R/W

auto increment

word address

acknowledge

from slave

A

DATA N + 1

auto increment

word address

 === '

P

acknowledge

from slave

A

DATA N + 31

auto increment

word address

last byte

SLAVE ADDRESS