FM24C02B Shanghai Fudan Microelectronics Co., Ltd., FM24C02B Datasheet - Page 10

• Manufacturer Part Number: FM24C02B
• Description: 2-wire Serial Eeprom
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

Figure 6．Output Acknowledge
Device Addressing
The 2K, 4K, 8K and 16K EEPROM device requires
an 8-bit device address word following a start
condition to enable the chip for a read or write
operation (refer to Figure 7).
The device address word consists of a mandatory
one, zero sequence for the first four most
significant bits as shown. This is common to all the
EEPROM devices.
The next 3 bits are the A2, A1 and A0 device
address bits for the 2K EEPROM. These 3 bits
must compare to their corresponding hard-wired
input pins (The A2, A1 and A0 device address bits are
“0” for the 2K EEPROM of TSOT23-5L package).
The 4K EEPROM only uses the A2, A1 for device
addressing. The third bit is a memory page address
bit. The A2, A1 bit must compare to its corresponding
hard-wired input pin. The A0 pin is no connecting.
The 8K EEPROM only uses the A2 device address
bit with the next 2 bits being for memory page
FM24C02B/04B/08B/16B 2-Wire Serial EEPROM
addressing. The A2 bit must compare to its
corresponding hard-wired input pin. The A1 and A0
pins are no connecting.
The 16K does not use any device address bits but
instead the 3 bits are used for memory page
addressing. These page addressing bits on the 4K,
8K and 16K devices should be considered the
most significant bits of the data word address
which follows. The A0, A1 and A2 pins are no
connecting.
The eighth bit of the device address is the
read/write operation select bit. A read operation is
initiated if this bit is high and a write operation is
initiated if this bit is low.
Upon a compare of the device address, the
EEPROM will output a zero. If a compare is not
made, the chip will return to a standby state.
Ver 1.6
Data Sheet
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