ACE24C02 Datasheet, PDF (8/20 Pages) ACE Technology Co., LTD. – Two-wire Serial EEPROM

ACE24C02/04/08/16B
Two-wire Serial EEPROM
Figure 2．Start and Stop Definition
Figure 3．Output Acknowledge
Device Addressing
The 2K, 4K, 8K and 16K EEPROM devices all require an 8-bit device address word following a start
condition to enable the chip for a read or write operation (see to Figure 4).
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 4K EEPROM only uses the A2 and A1 device address bits with the third bit being a memory page
address bit. The two device address bits must compare to their corresponding hard-wired input pins.
The A0 pin is no connect.
The 8K EEPROM only uses the A2 device address bit with the next 2 bits being for memory page
addressing. The A2 bit must compare to its corresponding hard-wired input pin. The A1 and A0 pins are
no connect.
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