AT88SC1003-09PT View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT88SC1003-09PT Datasheet PDF : 30 Pages
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AT88SC1003
Table 9. Device Functional Operation (Continued)
Function
Operation Sequence
ERASE
AZ1 and AZ3
Security Mode 2
Security Level 2 (Issuer Fuse = “0” or FUS pin = “0”)
SV = “1” and E1 (AZ1)/E3 (AZ3) = “1”
OPERATION:
Increment address counter to the first bit of the application zone erase key (EZ1 = Bit 432, EZ3 = Bit 1536).
Execute 48 INC/CMP operations, correctly verifying each bit of the 48-bit erase key.
Increment the address counter to the next bit (Bit 480 for AZ1, Bit 1584 for AZ3).
Perform “Erase Operation Sequence” as specified above.
FUNCTION: This operation will erase the entire application zone.
ERASE
AZ2
Security Mode 2
EC2 Mode
Enabled
Security Mode 2: (EC2EN = “1” and Issuer Fuse = “0” or FUS pin = “0”)
EC2 mode is enabled. Erase operations within Zone 2 are limited to 128.
OPERATION:
Increment address counter to the first bit of the application zone erase key (EZ2 = Bit 736).
Execute 32 INC/CMP operations, correctly verifying each bit of the 32-bit erase key.
Increment the address counter through the Application Zone 2 erase counter (EC2 = Bits 768–895) until a bit is
found that is set to “1”. Perform a write operation on this bit (this write will not increment the address counter).
Perform an erase operation on the same bit.
FUNCTION: This operation will erase the entire application zone.
ERASE
AZ2
Security Mode 2
EC2 Mode
Disabled
Security Mode 2 (EC2EN = “0” and Issuer Fuse = “0” or FUS pin = “0”)
EC2 mode is disabled. Unlimited erase operations in Zone 2.
OPERATION:
Increment address counter to the first bit of the application zone erase key (EZ2 = Bit 736).
Execute 32 INC/CMP operations, correctly verifying each bit of the 32-bit erase key.
Increment the address counter to the next bit (Bit 768).
Perform “Erase Operation Sequence” as specified above.
FUNCTION: This operation will erase the entire application zone.
Blowing
Manufacturer
Fuse
Set address counter between Address 1016 and 1019.
SV must be set.
The FUS pin can be either a “0” or a “1”.
RST pin = “0”
Perform a write operation.
Manufacturer fuse will be at a logic “0” state.
Blowing
EC2EN Fuse
EC2EN fuse must be blown before issuer fuse is blown.
SV must be set.
Set address between Address 1020 and 1023.
FUS pin = “1”
RST pin = “0”
Perform a write operation.
EC2EN fuse will be at a logic “0” state.
Blowing Issuer
Fuse
Set address counter between Address 992 and 1007.
SV must be set.
The FUS pin can be either a “0” or a “1”.
RST pin = “0”
Perform a write operation.
Issuer fuse will be at a logic “0” state.
17
2035B–SMEM–08/03
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