mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 177

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

MOTOROLA
6.2.8.1 Watchdog Reset Reference Register (WRRR)
The watchdog reset reference register (WRRR), Figure 6-8, contains the reference value for
the software watchdog timeout causing a reset.
Table 6-9 describes WRRR fields.
6.2.8.2 Watchdog Interrupt Reference Register (WIRR)
The watchdog interrupt reference register (WIRR), Figure 6-9, contains the reference value
for the software watchdog timeout causing an interrupt.
Table 6-10 describes WIRR fields.
15-1
15–1
Bits Field
Bits
0
Address
0
Address
Reset
Reset
Field
Field
R/W
R/W
REF
Field
IEN
REF
EN
15
15
Reference value. Contains the reference value for the watchdog timeout causing an interrupt.
Enable interrupt. When enabled, software should periodically write to WCR to avoid reaching the
interrupt reference value.
0 Disable interrupt.
1 Enable interrupt upon reaching interrupt reference value. If IEN is set when WER[WIE] = 1, an
Reference value. This field determines the reset timeout value.Reset initializes this register to 0xFFFE,
disabling the watchdog timer and setting it to the maximum timeout value.
Enable watchdog. When enabled, software should periodically write to WCR to avoid reaching the
reset reference value.
0 Watchdog timer disabled.
1 Watchdog timer enabled.
immediate interrupt occurs.
Figure 6-9. Watchdog Interrupt Reference Register (WIRR)
Figure 6-8. Watchdog Reset Reference Register (WRRR)
Chapter 6. System Integration Module (SIM)
Table 6-10. WIRR Field Descriptions
Table 6-9. WRRR Field Descriptions
1111_1111_1111_1110
1111_1111_1111_1110
MBAR + 0x280
MBAR + 0x284
REF
REF
Description
Description
R/W
R/W
Programming Model
1
1
IEN
EN
6-13
0
0