Espressif Systems ESP32 Technical Reference Manual page 123

11.5 Registers
31
SHA_SHA1_BUSY SHA-1 operation status: 1 if the SHA accelerator is processing data, 0 if idle. (RO)
31
SHA_SHA256_START Write 1 to start an SHA-256 operation on the first message block. (WO)
31
SHA_SHA256_CONTINUE Write 1 to continue the SHA-256 operation with subsequent blocks. (WO)
31
SHA_SHA256_LOAD Write 1 to finish the SHA-256 operation to calculate the final the message hash.
(WO)
Espressif Systems
Register 11.5: SHA_SHA1_BUSY_REG (0x08C)
0x00000000
Register 11.6: SHA_SHA256_START_REG (0x090)
0x00000000
Register 11.7: SHA_SHA256_CONTINUE_REG (0x094)
0x00000000
Register 11.8: SHA_SHA256_LOAD_REG (0x098)
0x00000000
122 ESP32 Technical Reference Manual V1.0
11 SHA ACCELERATOR
1 0
0 Reset
1 0
0
Reset
1 0
0 Reset
1 0
0 Reset