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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 994 -
Revision V1.30
NUC97
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CHNIC
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[7]
DMAEN
SHA/HMAC Engine DMA Enable Control
0 = SHA/HMAC DMA engine Disabled.
SHA/HMAC engine operates in Non-DMA mode, and gets data from the port
CRPT_HMAC_DATIN.
1 = SHA/HMAC DMA engine Enabled.
SHA/HMAC engine operates in DMA mode, and data movement from/to the
engine is done by DMA logic.
[6]
Reserved
Reserved.
[5]
DMALAST
SHA/HMAC Last Block
In DMA mode, this bit must be set as beginning the last DMA cascade
round.
In Non-DMA mode, this bit must be set as feeding in last byte of data.
[4]
HMACEN
HMAC_SHA Engine Operating Mode
0 = execute SHA function.
1 = execute HMAC function.
[3:2]
Reserved
Reserved.
[1]
STOP
SHA/HMAC Engine Stop
0 = No effect.
1 = Stop SHA/HMAC engine.
This bit is always 0 when it
’s read back.
[0]
START
SHA/HMAC Engine Start
0 = No effect.
1 = Start SHA/HMAC engine. BUSY flag will be set.
This bit is always 0 when it
’s read back.