Write data register
| WDATA | After pulsing START and writing 16 words of data to this register, WDATA_RDY will go low and the SHA-256 core will complete the digest of the current 512-bit block. Software is responsible for ensuring the data is correctly padded and terminated to a whole number of 512-bit blocks. After this, WDATA_RDY will return high, and more data can be written (if any). This register supports word, halfword and byte writes, so that DMA from non-word-aligned buffers can be supported. The total amount of data per block remains the same (16 words, 32 halfwords or 64 bytes) and byte/halfword transfers must not be mixed within a block. |