S-34C04A Datasheet, PDF (9/22 Pages) Seiko Instruments Inc – FOR DIMM SERIAL PRESENCE DETECT

Rev.1.0_01_U
2-WIRE SERIAL E²PROM FOR DIMM SERIAL PRESENCE DETECT
S-34C04A
5. Data transmission
Changing the SDA line while the SCL line is "L", data is transmitted.
Changing the SDA line while the SCL line is "H", a start or stop condition is recognized.
t_SU.DAT
t_HD.DI
SCL
SDA
(Input)
Figure 5 Data Transmission Timing
6. Acknowledge
The unit of data transmission is 8 bits. During the 9th clock cycle period the receiver on the bus pulls down the SDA
line to acknowledge the receipt of the 8-bit data.
When a write cycle is in progress, this IC does not generate an acknowledge.
SCL
(Input)
1
8
SDA
(Input)
SDA
(Output)
Start condition
Figure 6 Acknowledge Output Timing
9
Acknowledge
output
t_HD.DAT
9