MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 173

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

Specifications of MCF5272VF66

• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Not Compliant

6.2.8.3
The WCR,
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
The WER,
Table 6-11
Freescale Semiconductor
15-1
15–1
Bits
Bits
0
0
Address
Address
Field
REF
Field
IEN
Reset
Reset
WIE
Field
Field
—
R/W
R/W
Figure
describes WER fields.
Figure
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 immediate
Watchdog Counter Register (WCR)
Watchdog Event Register (WER)
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.
15
15
interrupt occurs.
6-11, reports when the watchdog timer reaches the WIRR value.
6-10, contains the 16 most significant bits of the software watchdog counter. Writing
MCF5272 ColdFire
Figure 6-10. Watchdog Counter Register (WCR)
Figure 6-11. Watchdog Event Register (WER)
Table 6-10. WIRR Field Descriptions
Table 6-11. WER Field Descriptions
®
Integrated Microprocessor User’s Manual, Rev. 3
0000_0000_0000_0000
0000_0000_0000_0000
MBAR + 0x28C
MBAR + 0x288
—
COUNT
Description
Description
R/W
R/W
System Integration Module (SIM)
1
WIE
0
0
6-13