AT24C02C_14 Datasheet, PDF (10/19 Pages) ATMEL Corporation – 2-wire Automotive Temperature Serial EEPROMs

7. Device Addressing
The 1K/2K/4K/8K EEPROM devices require an 8-bit device address word following a Start condition to enable
the device for a read or write operation.
The device address word consists of a mandatory '1010' sequence for the first four Most Significant Bits
(MSB). This is common to all the Serial EEPROM devices.
For the 1K/2K EEPROM, the next three bits are the A2, A1, and A0 device address bits. These three bits must
compare to their corresponding hardwired input A₂, A₁, and A₀ pins.
The 4K EEPROM only uses the A2 and A1 device address bits with the A0 bit being a memory address bit (P0).
The two device address bits must compare to their corresponding hardwired input A₂ and A₁ pins. The A₀ pin is
not connected.
The 8K EEPROM only uses the A2 device address bit with the next two bits (P1, P0) being for memory page
addressing. The A2 bit must compare to its corresponding hardwired input pin. The A₁ and A₀ pins are not
connected.
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.
After a valid comparison of the device address, the EEPROM will output a zero. If the comparison is invalid, the
device will return to a standby state.
Figure 7-1. Device Address
1K/2K 1 0 1 0 A2 A1 A0 R/W
MSB
LSB
4K 1 0 1 0 A2 A1 P0 R/W
8K 1 0 1 0 A2 P1 P0 R/W
10 AT24C01C/02C/04C/08C Automotive [DATASHEET]
Atmel-8819B-SEEPROM-AT24C01C-02C-04C-08C-Auto-Datasheet_072014