
8201, 8202, 8203, 8204 Acceleration Processor Data Sheet, DS-0157-05
Page 109
Exar Confidential
4.2.3
Hash Engine after Pad Engine
Figure 4-7 shows the data flow when the position of the Hash engine is after the Pad engine
and all four engines are enabled. In this configuration, the Hash engine calculates the MAC
value on the compressed “CMP” data and compares the calculated MAC value against the
MAC value on the information bus. The data flow for the remaining engines is the same as
of the encode operation “Hash Engine after Compress Engine”.
Figure 4-6. Decode Operation: Hash Engine after Encryption Engine