mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 357

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

18.5.2
The watchdog timer programming model consists of these registers:
18.5.2.1 Watchdog Control Register (WCR)
The 16-bit WCR configures watchdog timer operation.
Freescale Semiconductor
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•
•
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Watchdog control register (WCR), which configures watchdog timer operation
Watchdog modulus register (WMR), which determines the timer modulus
reload value
Watchdog count register (WCNTR), which provides visibility to the watchdog counter value
Watchdog service register (WSR), which requires a service sequence to
prevent reset
Address
Registers
Reset
Reset
Field
Field
R/W
R/W
1
IPSBAR Offset
S = CPU supervisor mode access only. S/U = CPU supervisor or user mode access. User
mode accesses to supervisor only addresses have no effect and result in a cycle termination
transfer error.
0x0014_0000
0x0014_0002
0x0014_0004
0x0014_0006
15
7
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Table 18-2. Watchdog Timer Module Memory Map
Figure 18-2. Watchdog Control Register (WCR)
14
6
—
R
Bits 15–8
Watchdog Count Register (WCNTR)
Watchdog Modulus Register (WMR)
Watchdog Service Register (WSR)
Watchdog Control Register (WCR)
IPSBAR + 0x0014_0000, 0x0014_0001
13
5
12
4
0000_0000
0000_1111
—
R
WAIT
11
3
Bits 7–0
DOZE
10
2
R/W
HALTED
Access
9
1
S/U
S/U
S
S
Watchdog Timer Module
1
EN
8
0
18-3