SERVICE MANUAL
27
protection. The Write Protect pin allows normal read/write operations when connected to ground (GND).
When the Write Protect pin is connected to Vcc, the write protection feature is enabled and operates as
shown in table 12.
Table 12
Part of the Array Protected
WP Pin
Status
24C01A 24C02 24C04 24C08 24C16
At Vcc
Full (1 K)
Array
Full (2K)
Array
Full (4K)
Array
Normal
Read/
Write
Operation
Upper
Half
(8K)
Array
At GND
Normal Read/Write Operations
4.5 Memory Organization
AT24C01A, 1K SERIAL EEPROM: Internally organized with 16 pages of 8 bytes each, the 1K requires a
7-bit data word address for random word addressing.
AT24C02, 2K SERIAL EEPROM: Internally organized with 32 pages of 8 bytes each, the 2K requires an
8-bit data word address for random word addressing.
AT24C04, 4K SERIAL EEPROM: Internally organized with 32 pages of 16 bytes each, the 4K requires a
9-bit data word address for random word addressing.
AT24C08, 8K SERIAL EEPROM: Internally organized with 64 pages of 16 bytes each, the 8K requires a
10-bit data word address for random word addressing.
AT24C16, 16K SERIAL EEPROM: Internally organized with 128 pages of 16 bytes each, the 16K
requires an 11-bit data word address for random word addressing.
4.6 Block Diagram
Fig.10
4.7 Refer to Table 21 about Functions and Data of the IC’s Pins.
