Table of Contents
Advertisement
AES hardware accelerator (AES)
24.7.2
AES status register (AES_SR)
Address offset: 0x04
Reset value: 0x0000 0000
31
30
29
28
Res.
Res.
Res.
Res.
r
r
r
r
15
14
13
12
Res.
Res.
Res.
Res.
r
r
r
r
Bits 31:4 Reserved, must be kept at zero
Bit 3 BUSY: Busy
This flag indicates whether AES is idle or busy during GCM payload encryption phase:
0: Idle
1: Busy
The flag is controlled by hardware. When the flag indicates "idle", the current message processing
may be suspended to process a higher-priority message.
This flag is effective only in GCM payload encryption phase. in other chaining modes, or in GCM
phases other than payload encryption, the flag must be ignored.
734/1324
27
26
25
24
Res.
Res.
Res.
Res.
r
r
r
r
11
10
9
8
Res.
Res.
Res.
Res.
r
r
r
r
RM0430 Rev 8
23
22
21
20
Res.
Res.
Res.
Res.
r
r
r
7
6
5
4
Res.
Res.
Res.
Res.
r
r
r
19
18
17
Res.
Res.
Res.
r
r
r
r
3
2
1
BUSY
WRERR RDERR
r
r
r
r
RM0430
16
Res.
r
0
CCF
r
Advertisement
Table of Contents
Need help?
Do you have a question about the STM32F423 and is the answer not in the manual?