S-24C02BPPHL Datasheet, PDF (17/39 Pages) Seiko Instruments Inc – 2-WIRE CMOS SERIAL E2PROM

Rev.2.2_00
2-WIRE CMOS SERIAL E²PROM
S-24C02BPPHL
7.3 Sequential read
When the E²PROM receives a 7-bit device address and the 1-bit read/write instruction code “1” in both
current and random read operations following the start condition signal, it outputs the acknowledge signal.
When 8-bit data is output from the E²PROM, in synchronization with the SCL clock, the memory address
counter inside the E²PROM is automatically incremented at the falling edge of the SCL clock at which the
8th data is output.
When the master device transmits the acknowledge signal, the next memory address data is output.
When the master device transmits the acknowledge signal, the memory address counter inside the
E²PROM is incremented and data can be read in succession. This is called “Sequential Read”.
When the master device does not output an acknowledge signal and transmits the stop condition signal, the
read operation is finished.
Data can be read in the “Sequential Read” mode in succession. When the memory address counter reaches
the last word address, it rolls over to the first memory address.
SDA
line
R
DEVICE E
ADDRESS A
D
D7
1
RA
/C
WK
A
C
K
D0 D7
A
C
K
D0 D7
NO ACK from
master device
S
A
T
C
O
K
P
D0 D7
D0
DATA (n)
DATA (n +1 )
DATA (n + 2)
DATA (n + x)
ADR INC
ADR INC
ADR INC
ADR INC
Figure 15 Sequential Read
Seiko Instruments Inc.
17