AT88SC102-09ET-XX-2.7 View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'AT88SC102-09ET-XX-2.7' PDF : 26 Pages View PDF
AT88SC102
Table 12-1. Device Functional Operation (Continued)
Name
Functional Operation Sequence
ERASE
(Application
Zone 2)
Security Level
2
EC Mode
Enabled
Security level 2: (Issuer Fuse = “0” or FUS pin = “0”)
EC mode is enabled. Erase operations within AZ2 are limited to 128.
Application Zone 1 can only be erased when SV = “1” and E1 = “1”.
OPERATION:
Set SV = “1” by validating the security code (see definition of SV internal flag).
Increment address counter to the first bit of the Application Zone 2 Erase Key (EZ2 = bit 1248).
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 1280–1407) 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. One additional bit of Erase Counter 2 will now be written to “0”.
The erase operation in EC2 will initiate the AZ2 erase, but will not affect the state of the bits within EC2.
ERASE
(Application
Zone 1 or 2)
Security Level
2
EC Mode
Disabled
Security Level 2: (Issuer Fuse = “0” or FUS pin = “0”)
EC mode is disabled in AZ2. Unlimited erase operations in AZ2. AZ1 always allows unlimited erase operations.
Application Zone 1 can only be erased when SV = “1” and E1 = “1”.
Application Zone 2 can only be erased when SV = “1” and E2 = “1”.
OPERATION:
Set SV = “1” by validating the security code (see definition of SV internal flag).
Increment address counter to the first bit of the Application Zone Erase Key (EZ1 = bit 688, EZ2 = bit 1248).
Execute 32 or 48 INC/CMP operations, correctly verifying each bit of the 32- or 48-bit erase key.
Increment the address counter to the next bit (bit 736, to erase AZ1, bit 1280 to erase AZ2).
Perform an erase operation on this bit.
FUNCTION:
This operation will erase the entire Application Zone but does not affect the word containing bit 736 or 1280.
Block
Write/Erase
Enabled in Security Level 1 only.
OPERATION:
Set address counter between address 1440 and 1455.
SV must be set.
FUS pin must be high.
Perform a write or erase operation.
FUNCTION:
The entire memory excluding the Fabrication Zone (FZ), Memory Test Zone (MTZ) and Manufacturer’s Zone (MFZ)
will be written to “0” (write) or “1” (erase).
The block write/erase modes are used to quickly personalize the device.
15
1419C–SMEM–6/08
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