2 watchdog modulus register (wmr), 2 watchdog modulus register (wmr) -4 – Motorola ColdFire MCF5281 User Manual
Page 358

Watchdog Timer Module
18-4
Freescale Semiconductor
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
7
6
5
4
3
2
1
0
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)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3