Harman Kardon DVD 27 Service Manual page 75

DVD27
Memory Organization
The AT24C08A only uses the A2 input for hardwire addressing and a total of two 8K
devices may be addressed on a single bus system. The A0 and A1 pins are no
connects.
The AT24C16A does not use the device address pins, which limits the number of
devices on a single bus to one. The A0, A1 and A2 pins are no connects.
WRITE PROTECT (WP): The AT24C01A/02/04/08A/16A has a Write Protect pin that
provides hardware data protection. The Write Protect pin allows normal read/write oper-
ations when connected to ground (GND). When the Write Protect pin is connected to
V , the write protection feature is enabled and operates as shown in the following
CC
table.
Table 2. Write Protect
WP Pin
Status 24C01A
At V Full (1K) Array
CC
At GND Normal Read/Write Operations
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.
AT24C08A, 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.
AT24C16A, 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.
75
AT24C01A/02/04/08A/16A
Part of the Array Protected
24C02 24C04
Full (2K) Array Full (4K) Array
harman/kardon
24C08A 24C16A
Full (8K) Array Full (16K) Array