AT88SC1003-09PT View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88SC1003-09PT

1K EEPROM–Security Logic with Three Application Zones

Atmel Corporation 

Table 9. Device Functional Operation (Continued)

Function

Operation Sequence

WRITE

A write operation sets the bit(s) to a logic “0”.

OPERATION:

CLK = “0”

PGM “0”→“1” (I/O switches to an input)

I/O = “0” (Input = “0” for write operation)

CLK “0” →“1” (rising edge of CLK starts the write operation)

PGM “1” →“0”

I/O “0” →“Z” (high impedance)

Wait Tchp (see Table 11 on page 19)

CLK “1” →"0" (falling edge of CLK ends the write operation)

Note: The falling edge of CLK that ends the write operation does not increment the address counter.

FUNCTION:

Non-application Zones:

The write operation is inhibited for addresses where security prevents a write operation

(see Table 6 and Table 7).

Application Zones:

The application zones can be written when:

Security Level 1: SV = “1”

Security Level 2: SV = “1” and P1(AZ1)/P2(AZ2)/P3(AZ3) = “1”

ERASE

Operation

Sequence

CLK = “0”

PGM “0” →“1” (I/O switches to an input)

I/O = “1” (input = “1” for erase operation)

CLK “0” →“1” (rising edge of CLK starts the erase operation)

PGM “1” →“0”

I/O “0” →“Z” (high impedance)

Wait Tchp (See AC Electrical Characteristics)

CLK “1” →“0” (falling edge of CLK ends the erase operation)

Note: The falling edge of CLK that ends the erase operation does not increment the address counter.

ERASE

(Non-

application

Zones)

An erase operation sets the bits to logic “1”. The EEPROM memory is organized into 16-bit words. Although

erases are performed on single bits, the erase operation clears an entire word in the memory (except for the

Application Zones AZ1, AZ2, and AZ3 in Security Level 2). Therefore, performing an erase on any bit in the word

will clear all 16 bits of that word to logic “1”.

OPERATION:

Perform “Erase Operation Sequence” as specified above.

FUNCTION:

The erase operation is inhibited for addresses where security prevents an erase operation (see Table 6 and Table 7).

ERASE

AZ1, AZ2 and

AZ3

Security Mode 1

Security Level 1: (Issuer fuse = “1” and FUS pin = “1”)

Application Zones 1, 2, and 3 can be erased when: SV = “1”

OPERATION:

Increment address counter to any bit within AZ1, AZ2, or AZ3.

Perform “Erase Operation Sequence” as specified above.

FUNCTION: This operation will erase the entire application zone.

16 AT88SC1003

2035B–SMEM–08/03

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