AT88SA102S_11 ATMEL [ATMEL Corporation], AT88SA102S_11 Datasheet - Page 17

• Manufacturer Part Number: AT88SA102S_11
• Description: Atmel CryptoAuthentication Product Authentication Chip
• Manufacturer: ATMEL [ATMEL Corporation]

6.3
BurnFuse
Burns a single one of the status fuse bits (Fuse[64] – Fuse[86]). No other fuses can be burned with this command – use
BurnSecure at personalization time to burn any of the first 88 fuses.
If the BurnFuse enable bit (Fuse 1) has been burned to a zero, then attempts to run this command will return an error.
The power supply pin must meet the V
V
to 250µs. If V
internal burn time will be up to 262ms. The chip does not internally check the supply voltage level.
There is a very small interval during t
supply must not be removed and the watchdog timer must not be allowed to expire; or the fuse may end up in a state where it
reads as un-burned but cannot be burned.
Table 6-7.
Table 6-8.
Opcode
Param1
Param2
Data
Name
Success
CC
is greater than or equal to 3.7V, then the BurnTime parameter should be set to 0x00 and the internal burn time will be up
CC
Input Parameters
Output Parameters
Name
BURNFUSE
FuseNum
BurnTime
Ignored
Size
1
is less than 3.7V but greater than V
Notes
Upon successful execution, a value of zero will be returned by AT88SA102S
Size
1
1
2
0
EXEC_BURN
BURN
Notes
0x04
Which bit within fuse array, minimum value is 64, and maximum value is 86
Must be 0x0000 if Vcc >+3.7 V; must be 0xFFFF otherwise
specification during the entire BurnFuse command in order to burn fuses reliably. If
when the fuse element is actually being burned. During this interval the power
BURN
then the BurnTime parameter should be set to 0xFFFF and the
Atmel AT88SA102S [DATASHEET]
8584G−CRYPTO−9/11
17