AT28C010-12DK(2005) データシートの表示（PDF） - Atmel Corporation

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AT28C010-12DK
(Rev.:2005)

Space 1-megabit (128K x 8) Paged Parallel EEPROMs

Atmel Corporation 

DC and AC Operating

Range

or disabled by the user; the AT28C010-12DK is shipped from Atmel with SDP

disabled.

• SDP is enabled by the host system issuing a series of three write commands; three

specific bytes of data are written to three specific addresses (refer to Software Data

Protection Algorithm). After writing the 3-byte command sequence and after tWC the

entire AT28C010-12DK will be protected against inadvertent write operations. It

should be noted, that once protected the host may still perform a byte or page write

to the AT28C010-12DK. This is done by preceding the data to be written by the

same 3-byte command sequence used to enable SDP.

• Once set, SDP will remain active unless the disable command sequence is issued.

Power transitions do not disable SDP and SDP will protect the AT28C010-12DK

during power-up and power-down conditions. All command sequences must

conform to the page write timing specifications. The data in the enable and disable

command sequences is not written to the device and the memory addresses used in

the sequence may be written with data in either a byte or page write operation.

• After setting SDP, any attempt to write to the device without the 3-byte command

sequence will start the internal write timers. No data will be written to the device;

however, for the duration of tWC, read operations will effectively be polling

operations.

• DEVICE IDENTIFICATION: An extra 128 bytes of EEPROM memory are available

to the user for device identification. By raising A9 to 12V ± 0.5V and using address

locations 1FF80H to 1FFFFH the bytes may be written to or read from in the same

manner as the regular memory array.

• OPTIONAL CHIP ERASE MODE: The entire device can be erased using a 6-byte

software code. Please see Software Chip Erase application note for details.

Operating Temperature (Case)

VDD Power Supply

AT28C010-12DK-12

-55°C to +125°C

5V ± 10%

4 AT28C010-12DK

4259C–AERO–05/05

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