User Manual

135
8111A–AVR–05/08
AT86RF231
• Bits 3 - AES_DIR
This register bit sets the AES operation direction, either encryption or decryption.
• Bit [2:0] - Reserved
Register 0x94 (AES_CON_MIRROR):
Register 0x94 is a mirrored version of register 0x83 (AES_CON), for details refer to register
0x83 (AES_CON).
This register could be used to start a security operation within a single SRAM access by append-
ing it to the data stream and setting register bit AES_REQUEST = 1.
Table 11-7. AES Direction
Register Bit Value Description
AES_DIR 0
AES encryption (ECB, CBC)
1 AES decryption
Bit 7 6 5 4 3 2 1 0
+0x83 AES_REQUEST AES_MODE AES_DIR Reserved AES_CON
Read/Write W R/W R/W R/W R/W R R R
Reset Value 0 0 0 0 0 0 0 0