s-24c32c Seiko Instruments Inc., s-24c32c Datasheet - Page 12

• Manufacturer Part Number: s-24c32c
• Description: 2-wire Serial Eeprom S-24c32c/64c 32k/64k-bit
• Manufacturer: Seiko Instruments Inc.

12
2-WIRE CMOS SERIAL E
S-24C32C/64C
5. Device Addressing
To start communication, the master device on the system generates a start condition to the bus line. Next, the
master device sends 7-bit device address and a 1-bit read / write instruction code on to the SDA bus.
The upper 4 bits of the device address are the “Device Code”, and are fixed to “1010”.
In the S-24C32C/64C, successive 3 bits are the “Slave Address”. These 3 bits are used to identify a device on the
system bus and is compared with the predetermined value which is defined by the address input pins (A2, A1, A0).
When the comparison result matches, the slave device responds with an acknowlede during the 9th clocks cycle.
MSB
1
2
PROM
Device Code
0
Figure 13 Device Address
1
Seiko Instruments Inc.
0
A2
Address
Slave
A1
A0
R / W
LSB
Rev.2.0
_00_H