109
6174B–ATARM–07-Nov-05
AT91FR40162S Preliminary
15.3.2
WD Clock Mode Register
Name:
WD_CMR
Access:
Read/Write
Reset Value:
0
Offset:
0x04
• WDCLKS: Clock Selection
• HPCV: High Preload Counter Value (Code Label
WD_HPCV
)
Counter is preloaded when watchdog counter is restarted with bits 0 to 11 set (FFF) and bits 12 to 15 equaling HPCV.
• CKEY: Clock Access Key (Code Label
WD_CKEY
)
Used only when writing WD_CMR. CKEY is read as 0.
0x06E: Write access in WD_CMR is allowed.
Other value: Write access in WD_CMR is prohibited.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
CKEY
7
6
5
4
3
2
1
0
CKEY
–
HPCV
WDCLKS
WDCLKS
Clock Selected
Code Label
WD_WDCLKS
0
0
MCK/8
WD_WDCLKS_MCK8
0
1
MCK/32
WD_WDCLKS_MCK32
1
0
MCK/128
WD_WDCLKS_MCK128
1
1
MCK/1024
WD_WDCLKS_MCK1024