s-24c128ci-t8t1u3 Seiko Instruments Inc., s-24c128ci-t8t1u3 Datasheet - Page 11

• Manufacturer Part Number: s-24c128ci-t8t1u3
• Description: 2-wire Serial Eeprom S-24c128c 128k-bit
• Manufacturer: Seiko Instruments Inc.

2
2-WIRE CMOS SERIAL E
PROM
Rev.2.0
S-24C128C
_00_H
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-24128C, 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.
Slave
Device Code
Address
1
0
1
0
A2
A1
A0
R / W
MSB
LSB
Figure 11 Device Address
Seiko Instruments Inc.
11