at88sc018 ATMEL Corporation, at88sc018 Datasheet - Page 13

• Manufacturer Part Number: at88sc018
• Description: Cryptocompanion? Chip For Cryptomemory And Cryptorf
• Manufacturer: ATMEL Corporation

1.5.13. Memory Initialization Values
5277C–CryptoCompanion–9/09
Upon shipment from the Atmel factory, the following locations will have predefined values. The contents of all other
locations are not guaranteed by Atmel.
Table 11.
Certain values within the AT88SC018 memory array MUST be properly programmed prior to locking of the memory.
Failure to properly initialize these locations will result in unpredictable and/or unsecure operation of the part.
Table 12.
SHA Constant
EncKey
ManufacturingID
Lock
RNGSeed
Dev
CF0 – CF15
SystemSecret,
CmcSecret
RW_Bound
F_Bound
Mode
FlashDigest
Name
Name
Predefined Initial Memory Values
Customer Defined Memory Values
Defined by FIPS PUB 180-1.This is written at the Atmel factory and cannot subsequently be
changed.
Customer Specific, Contact Atmel. See
A unique value for all AT88SC018 chips, see
xxxx_xx10 or xxxx_xx00, per
Random values for each AT88SC018. See
TWI bus address, shipped as 0xC0. See
Random values for each AT88SC018. See
These values are used to perform a mutual authentication between the AT88SC018 and the
system processor. See the
details.
The boundary between ReadOnly and ReadWrite memory. See
information.
Controls the number of F secrets in the array, see
The lower 2 bits control the way in which VerifyFlash is run, see
The upper 5 bits MUST be ‘0’ for proper operation; other values may result in security or
functional issues.
If Mode.Bit[1:0] is set to 0, then this must be set to the proper value per the descriptions in the
VerifyFlash command, see
Startup (Section
Section 3.1.
Sections 1.5.1
Section 1.5.2
Section 1.5.4
Initial Value
Initial Value
Section 1.5.6
Section 1.5.10
3.2) and
&
Section 1.5.3
1.5.2.
Section 1.5.9
CryptoCompanion Chip
Consult Atmel for ordering information.
ChallengeResponse (Section
for more details.
Sections 1.5.7 & 1.5.8
for value limitations.
Section 3.1
for more details.
3.3) for more
for more
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