AT88SC25616C-EK Atmel, AT88SC25616C-EK Datasheet - Page 23
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
AT88SC25616C-EK
Manufacturer Part Number
AT88SC25616C-EK
Description
MCU, MPU & DSP Development Tools CRYPTOMEMORY 256K 16 ZONE DEV KIT
Manufacturer
Atmel
Datasheet
1.AT88SC25616C-EK.pdf
(58 pages)
Specifications of AT88SC25616C-EK
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 23 of 58
- Download datasheet (2Mb)
5.4
20
Security Fuses
AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
CryptoMemory uses four fuses. The status of these fuses is given in a ‘fuse byte.’ A value of ‘0’
indicates that the fuse has been blown. Bits 4 to 7 of this byte are not used as Security Fuses
and are reserved for Atmel use.
Table 5-7.
The bits SEC, PER, CMA and FAB are non-volatile fuses blown at the end of various steps in
the manufacturing and personalization process. Once blown, these fuses can never be reset.
Atmel blows the SEC fuse to lock the lot history code before the device leaves the factory. Blow-
ing the remainder of the fuses must follow the sequence:
Any attempt to blow a fuse out of sequence will be unsuccessful.
Table 5-8 on page 21
each fuse condition.
1. FAB – To lock the Answer To Reset and the Fab Code portions of the Configuration
2. CMA – To lock the Card Manufacturer Code of the Configuration Memory
3. PER – To lock the remainder of the Configuration Memory
resv
F
7
Memory.
resv
Device Fuses
F
6
provides a summary of access rights for all portions of the memory for
resv
F
5
resv
F
4
SEC
F
3
PER
F
2
CMA
F
1
5210B–SMIC–11/08
FAB
F
0
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