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ATSHA204 Datasheet(PDF) 53 Page - ATMEL Corporation

Part # ATSHA204
Description  Atmel CryptoAuthentication
PDF  65 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATSHA204 Datasheet(HTML) 53 Page - ATMEL Corporation

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Atmel ATSHA204 [DATASHEET]
53
8740D
−CRYPTO−3/12
If reading the data zone and the EncryptRead bit is set in the corresponding SlotConfig word, the following actions are taken to
encrypt the data:
All of the TempKey register bits must be properly set as follows, or this command returns an error:
TempKey.Valid == 1
TempKey.GenData == 1
TempKey.KeyID == SlotConfig.ReadKey
TempKey.SourceFlag == “Rand”
XOR the data from the memory zone with TempKey. Return as “Contents.”



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