NXP Semiconductors K32 L2A Series, Reference Manual, Page: 338 / 1379

Table 15-4. AESR command example
Register Before After
CA0 0x0102_0304 0x0106_0B00
CA1 0x0506_0708 0x050A_0F04
CA2 0x090A_0B0C 0x090E_0308
CA3 0x0D0E_0F00 0x0D02_070C
Where:
• row 1 = CA0[31:24], CA1[31:24], CA2[31:24], CA3[31:24]
• row 2 = CA0[23:16], CA1[23:16], CA2[23:16], CA3[23:16]
• row 3 = CA0[15:8], CA1[15:8], CA2[15:8], CA3[15:8]
• row 4 = CA0[7:0], CA1[7:0], CA2[7:0], CA3[7:0]
15.6.3.16 AES Inverse Shift Rows (AESIR)
The AESIR command performs the AES inverse shift rows operation on registers CA0,
CA1, CA2, and CA3. The table below shows an example.
Table 15-5. AESIR command example
Register Before After
CA0 0x0106_0B00 0x0102_0304
CA1 0x050A_0F04 0x0506_0708
CA2 0x090E_0308 0x090A_0B0C
CA3 0x0D02_070C 0x0D0E_0F00
Where:
• row 1 = CA0[31:24], CA1[31:24], CA2[31:24], CA3[31:24]
• row 2 = CA0[23:16], CA1[23:16], CA2[23:16], CA3[23:16]
• row 3 = CA0[15:8], CA1[15:8], CA2[15:8], CA3[15:8]
• row 4 = CA0[7:0], CA1[7:0], CA2[7:0], CA3[7:0]
15.6.3.17 DES Round (DESR)
The DESR command performs a round of the DES algorithm and a key schedule update
with the following source and destination designations: CA0=C, CA1=D, CA2=L,
CA3=R. If the IP bit is set, DES initial permutation performs on CA2 and CA3 before the
round operation. If the FP bit is set, DES final permutation, that is, inverse initial
permutation, performs on CA2 and CA3 after the round operation. The round operation
Functional description
K32 L2A Reference Manual, Rev. 2, 01/2020
338 NXP Semiconductors