AT24HC02B-TP25-B ATMEL [ATMEL Corporation], AT24HC02B-TP25-B Datasheet - Page 8

• Manufacturer Part Number: AT24HC02B-TP25-B
• Description: Two-wire Automotive Temperature Serial EEPROM
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 7-3.
Figure 7-4.
8. Device Addressing
8
AT24HC02B/04B
Start and Stop Definition
Output Acknowledge
The 2Kand 4K EEPROM devices all require an 8-bit device address word following a start condi-
tion to enable the chip for a read or write operation (see to
The device address word consists of a mandatory “1”, “0” sequence for the first four most signif-
icant bits as shown. This is common to all the Serial 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 hardwired input pins.
The 4K EEPROM only uses the A2 and A1 device address bits with the third bit being a memory
address bit (See
hardwired input pins. The A0 pin is no-connect.
The eighth bit of the device address is the read/write operation select bit. A read operation is ini-
tiated 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 “0”. If a compare is not made,
the chip will return to a standby state.
Figure
10-1). The two device address bits must compare to their corresponding
Figure 10-1 on page
10).
5192C–SEEPR–01/09