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Memory Map and Registers
Bit(s)
Name
15–4
—
3
WAIT
2
DOZE
1
HALTED
0
EN
18.5.2.2 Watchdog Modulus Register (WMR)
15
Field
WM15
Reset
R/W
7
Field
WM7
Reset
R/W
Address
18-4
Table 18-3. WCR Field Descriptions
Reserved, should be cleared.
Wait mode bit. Controls the function of the watchdog timer in wait mode. Once written, the
WAIT bit is not affected by further writes except in halted mode. Reset sets WAIT.
1 Watchdog timer stopped in wait mode
0 Watchdog timer not affected in wait mode
Doze mode bit. Controls the function of the watchdog timer in doze mode. Once written, the
DOZE bit is not affected by further writes except in halted mode. Reset sets DOZE.
1 Watchdog timer stopped in doze mode
0 Watchdog timer not affected in doze mode
Halted mode bit. Controls the function of the watchdog timer in halted mode. Once written, the
HALTED bit is not affected by further writes except in halted mode.
During halted mode, watchdog timer registers can be written and read normally. When halted
mode is exited, timer operation continues from the state it was in before entering halted mode,
but any updates made in halted mode remain. If a write-once register is written for the first time
in halted mode, the register is still writable when halted mode is exited.
1 Watchdog timer stopped in halted mode
0 Watchdog timer not affected in halted mode
Note: Changing the HALTED bit from 1 to 0 during halted mode starts the watchdog timer.
Changing the HALTED bit from 0 to 1 during halted mode stops the watchdog timer.
Watchdog enable bit. Enables the watchdog timer. Once written, the EN bit is not affected by
further writes except in halted mode. When the watchdog timer is disabled, the watchdog
counter and prescaler counter are held in a stopped state.
1 Watchdog timer enabled
0 Watchdog timer disabled
14
13
WM14
WM13
6
5
WM6
WM5
IPSBAR + 0x0014_0002, 0x0014_0003
Figure 18-3. Watchdog Modulus Register (WMR)
MCF5282 User's Manual
Description
12
11
WM12
WM11
1111_1111
R/W
4
3
WM4
WM3
1111_1111
R/W
10
9
8
WM10
WM9
WM8
2
1
0
WM2
WM1
WM0
MOTOROLA
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