Microcontroller User's Manual
18-4 MCF5282 User’s Manual MOTOROLA
Memory Map and Registers
18.5.2.2 Watchdog Modulus Register (WMR)
Table 18-3. WCR Field Descriptions
Bit(s) Name Description
15–4 — Reserved, should be cleared.
3 WAIT 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
2 DOZE 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
1 HALTED 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.
0 EN 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
15 14 13 12 11 10 9 8
Field WM15 WM14 WM13 WM12 WM11 WM10 WM9 WM8
Reset 1111_1111
R/W R/W
765 4 3210
Field WM7 WM6 WM5 WM4 WM3 WM2 WM1 WM0
Reset 1111_1111
R/W R/W
Address IPSBAR + 0x0014_0002, 0x0014_0003
Figure 18-3. Watchdog Modulus Register (WMR)