PCF85102C-2T PHILIPS [NXP Semiconductors], PCF85102C-2T Datasheet - Page 10

• Manufacturer Part Number: PCF85102C-2T
• Description: 256 x 8-bit CMOS EEPROMs with I2C-bus interface
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
8.5
The read operations are initiated in the same way 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 sequential read.
2000 Feb 15
handbook, full pagewidth
handbook, full pagewidth
256
I
2
C-bus interface
Read operations
S
Fig.8 Master reads PCF8510xC-2 slave after setting word address (write word address; read data).
8-bit CMOS EEPROMs with
SLAVE ADDRESS
Fig.9 Master reads PCF8510xC-2 immediately after first byte (read mode).
S
acknowledge
R/W
from slave
SLAVE ADDRESS
0 A
WORD ADDRESS
acknowledge
R/W
from slave
1 A
acknowledge
from slave
at this moment master
transmitter becomes
master receiver and
EEPROM slave receiver
becomes slave transmitter
A
n bytes
DATA
S
10
SLAVE ADDRESS
8.5.1
The lower eight 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.
auto increment
word address
acknowledge
from master
A
R
PCF85102C-2; PCF85103C-2
EMARK
acknowledge
R/W
from slave
last bytes
1
MBA703 - 1
DATA
A
auto increment
word address
no acknowledge
from master
n bytes
DATA
MBA704 - 1
1
last byte
P
auto increment
word address
DATA
acknowledge
from master
Product specification
auto increment
A
word address
no acknowledge
from master
1
P