mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 178

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Programming Model
6.2.8.3 Watchdog Counter Register (WCR)
The WCR, Figure 6-10, contains the 16 most significant bits of the software watchdog
counter. Writing any value to WCR resets the counter and prescaler and should be executed
on a regular basis if the watchdog is enabled.
6.2.8.4 Watchdog Event Register (WER)
The WER, Figure 6-11, reports when the watchdog timer reaches the WIRR value.
Table 6-11 describes WER fields.
6-14
15–1
Bits
Address
Address
0
Reset
Reset
Field
Field
R/W
R/W
Field
WIE
—
15
15
Reserved, should be cleared.
Watchdog interrupt event.
0 WIRR value has not been reached.
1 WIRR value has been reached.
WIE is cleared by writing a 1 to it. The timer does not negate the interrupt request to the interrupt
controller until WIE is cleared. WIE is set regardless of the state of WIRR[IEN]; however, an interrupt is
not asserted to the controller unless WIRR[IEN] = 1.
Figure 6-10. Watchdog Counter Register (WCR)
Figure 6-11. Watchdog Event Register (WER)
Table 6-11. WER Field Descriptions
MCF5272 User’s Manual
0000_0000_0000_0000
0000_0000_0000_0000
MBAR + 0x28C
MBAR + 0x288
—
Description
COUNT
R/W
R/W
MOTOROLA
1
WIE
0
0