An Easy-to-Integrate IP Design of AHB Slave Bus Interface for the Security Chip of IoT

Table 3

The function description of the SM4 control register.

Bit	Operation	Type	Description
[1 : 0]	Data flag	R/W	01: key; 10: data to be encrypted; 11: data to be decrypted; 00: invalid input data
2	Data update		0: no update; 1: update
3	Reset control		0: rset
[31 : 4]	Reserve