AT88SC1003 查看數據表（PDF） - Atmel Corporation

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AT88SC1003

1K EEPROM–Security Logic with Three Application Zones

Atmel Corporation 

Table 4. Definition of AT88SC1003 Internal Flags (Continued)

Flag

Definition

Operation

E1

Application Zone 1 Erase E1 is set when the Application Zone 1 erase code

Flag

comparison is valid. This flag is reset when the

address counter = 0.

E2

Application Zone 2 Erase This flag is set by correctly matching the

Flag with Erase Counter

Application Zone 2 erase code (EZ2) bit by bit as

Operation Enabled (EC2EN CLK increments the address counter. A validation

FUSE = “1”)

operation must then be completed. This operation

requires the user to find a bit in the Application

Zone 2 erase counter (EC2), addresses 768–895,

that is a logic “1”. A write must then be performed,

followed by an erase. The part will validate that

the comparison was correct and Application Zone

2 will be erased. It is reset when the address

counter = 0.

E2

Application Zone 2 Erase E2 is set when the Application Zone 2 erase code

Flag with Erase Counter

comparison is valid. This flag is reset when the

Operation Disabled

address counter = 0.

(EC2EN FUSE = “0”)

E3

Application Zone 3 Erase E3 is set when the Application Zone 3 erase code

Flag

comparison is valid. This flag is reset when the

address counter = 0.

Function

Application Zone 1 (Bits 176–

431) is erased when E1 is set

and an erase is performed on Bit

480. This operation erases all

bits in Application Zone 1 but

does not affect the word

containing Bit 480.

Application Zone 2 (Bits 480–

735) is erased when E2 is set

and an erase is performed after

the validation operation in EC2

described above. This operation

erases all bits in Application

Zone 2.

Application Zone 2 (Bits 480–

735) is erased when E2 is set

and an erase is performed on Bit

768. This operation erases all

bits in Application Zone 2 but

does not affect the word

containing Bit 768.

Application Zone 3 (Bits 1024–

1535) is erased when E3 is set

and an erase is performed on Bit

1584. This operation erases all

bits in Application Zone 3.

10 AT88SC1003

2035B–SMEM–08/03

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