pcf85102c-2 NXP Semiconductors, pcf85102c-2 Datasheet - Page 9

• Manufacturer Part Number: pcf85102c-2
• Description: 256 ? 8-bit Cmos Eeprom With I2c-bus Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 14216
Product data
Fig 7. Master reads PCF85102C-2 slave after setting word address (write word address; read data);
Fig 8. Master reads PCF85102C-2 immediately after first byte (read mode); current address read.
sequential read.
S
SLAVE ADDRESS
8.1.5 Read operations
S
acknowledge
R/W
from slave
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.
0 A
SLAVE ADDRESS
WORD ADDRESS
acknowledge
R/W
from slave
1 A
Rev. 04 — 22 October 2004
acknowledge
from slave
at this moment master
transmitter becomes
master receiver and
EEPROM slave receiver
becomes slave transmitter
A
n bytes
S
DATA
SLAVE ADDRESS
auto increment
word address
256
acknowledge
from master
A
8-bit CMOS EEPROM with I
acknowledge
R/W
from slave
last bytes
1
DATA
MBA703
A
auto increment
word address
no acknowledge
from master
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
n bytes
DATA
MBA704 - 1
PCF85102C-2
1
last byte
P
auto increment
word address
DATA
acknowledge
from master
auto increment
A
word address
no acknowledge
2
from master
C-bus interface
1
P
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