PCF8594C-2 데이터 시트보기 (PDF) - Philips Electronics
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PCF8594C-2 Datasheet PDF : 21 Pages
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Philips Semiconductors
PCF8594C-2
512 × 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 PCF8594C-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 PCF8594C-2 immediately after first byte (read mode); current address read.
9397 750 14221
Product data
Rev. 05 — 25 October 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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