AK6004A_02 Datasheet, PDF (5/16 Pages) Asahi Kasei Microsystems – I2C bus 4K / 16Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6004A/08A]
[SLAVE ADDRESS]
After the START condition, a SLAVE ADDRESS is sent. If the transmitted slave address matches
an address of one of the device, the designated slave pulls the SDA line to LOW.
AK6004A ・・The most significant four bits of the slave address are fixed as "1010". The next two
bits are S2, S1 device address bits. These two bits identify the specific device on the
bus. They is set by the hard wired input pins (S1 pin and S2 pin). Therefore a total
of four devices can be connected to the same bus.
The next one bit is the most significant bit of the memory address.
AK6008A ・・The most significant four bits of the slave address are fixed as "1010". The next three
bits are the most significant three bits of the memory address.
The last bit of the slave address (R/W bit) defines whether a write or read condition is requested by
the master. A "1" indicates that the read operation is to be executed. A "0" indicates that the write
operation is to be executed.
DEVICE ADDRESS ^{MSB of memory address}
1
0
1
0 S2 S1 A8 R/W
They is set by the hard-wired input pins (S1 pin and S2 pin).
Figure 4. Slave Address (AK6004A)
the most significant three bits of memory address
1
0
1
0 A10 A9 A8 R/W
Figure 5. Slave Address (AK6008A)
DAI01E-02
-5-
2002/11