Functional Description Of Sss; Cpu Mode; Fifo Mode - Samsung S5PC110 Manual

S5PC110_UM 2 ADVANCED CRYPTO ENGINE

2.2 FUNCTIONAL DESCRIPTION OF SSS

2.2.1 CPU MODE

Using the SFR, you can access the full functions of AES, DES, Hash, or PRNG. You can also supply the input
data, trigger an operation, and extract the output data.

2.2.2 FIFO MODE

BRDMA supplies input data to block ciphers such as AES or DES, as shown in 2-2. On the other hand,
Figure
BTDMA receives output data from AES or DES. Only one block (either AES or DES) can use the DMA. The other
block that does not occupy the DMA can be used in CPU or buffered CPU modes.
Figure 2-2 DES or 3DES Only Data Flow
2-4