S-24C02BPPHL Datasheet, PDF (10/39 Pages) Seiko Instruments Inc – 2-WIRE CMOS SERIAL E2PROM

2-WIRE CMOS SERIAL E²PROM
S-24C02BPPHL
Rev.2.2_00
3. Data transfer
Changing the SDA line while the SCL line is “L” allows the data to be transferred.
A start or stop condition is recognized when the SDA line changes while the SCL line is “H”.
tSU.DAT
tHD.DAT
SCL
SDA
Figure 7 Data Transfer Timing
4. Acknowledgment
8 bits of data are transferred in succession. The device on the system bus that receives the data changes
the SDA line to “L” during the 9th clock cycle and outputs the acknowledge signal to inform that it has
received the data.
The device does not output the acknowledge signal while the E²PROM is being rewritten.
SCL
(E²PROM input)
1
SDA
(Master output)
8
9
SDA
(E²PROM output)
Start condition
Acknowledge
output
t_AA
t_DH
Figure 8 Acknowledge Output Timing
10
Seiko Instruments Inc.