MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 234

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Core Register Summary
6.6.3
6.6.4
6-16
Reset
Reset
SPR TBU: 269 read/285 write
SPR 22
W
W
R
R
34–35 WRS Watchdog timer reset status. Functions as write-one-to-clear. Defined at reset (value = 00). Set to
38–63
Bits
32
33
36
37
TBL: 268 read/284 write
32
32
Name
ENW Enable next watchdog time. Functions as write-one-to-clear.
WIS
DIS
FIS
—
Time Base Registers
Decrementer Register
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
0 Action on next watchdog timer time-out is to set TSR[ENW]
1 Action on next watchdog timer time-out is governed by TSR[WIS]
When a watchdog timer time-out occurs while WIS = 0 and the next watchdog time-out is enabled
(ENW = 1), a watchdog timer exception is generated and logged by setting WIS. This is referred to as
a watchdog timer first time out. A watchdog timer interrupt occurs if enabled by TCR[WIE] and
MSR[CE]. To avoid another watchdog timer interrupt once MSR[CE] is reenabled, (assuming
TCR[WIE] is not cleared instead), the interrupt handler must reset TSR[WIS].
Watchdog timer interrupt status. Functions as write-one-to-clear.
0 A watchdog timer event has not occurred.
1 A watchdog timer event occurred. When MSR[CE] = 1 and TCR[WIE] = 1, a watchdog timer
See the description of ENW for more information about how WIS is used.
TCR[WRC] when a reset is caused by the watchdog timer.
Decrementer interrupt status. Functions as write-one-to-clear.
0 A decrementer event has not occurred.
1 A decrementer event occurred. When MSR[EE] = TCR[DIE] = 1, a decrementer interrupt is taken.
Fixed-interval timer interrupt status. Functions as write-one-to-clear.
0 A fixed-interval timer event has not occurred.
1 A fixed-interval timer event occurred. When MSR[EE] = 1 and TCR[FIE] = 1, a fixed-interval timer
Reserved, should be cleared.
interrupt is taken.
interrupt is taken.
Figure 6-12. Time Base Upper/Lower Registers (TBU/TBL)
TBU
Figure 6-13. Decrementer Register (DEC)
Table 6-10. TSR Field Descriptions
Decrementer value
All zeros
All zeros
63 32
Description
Access: User read/Supervisor write
TBL
Access: Supervisor read/write
Freescale Semiconductor
63
63