MC68HC912BD32CFU10 FREESCALE [Freescale Semiconductor, Inc], MC68HC912BD32CFU10 Datasheet - Page 110

• Manufacturer Part Number: MC68HC912BD32CFU10
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

COPRST — Arm/Reset COP Timer Register
Clocks
MC68HC912BD32 Rev 1.0
RESET:
CR2
0
0
0
0
1
1
1
1
Bit 7
Bit 7
CR1
0
0
1
1
0
0
1
1
0
CR0
0
1
0
1
0
1
0
1
6
6
0
CR2, CR1, CR0 — COP Watchdog Timer Rate Select Bits
Table 22 COP Watchdog Rates (RTBYP = 0)
Divide E
The COP system is driven by a constant frequency of E/2
in the RTICTL register allows all but two stages of this divider to be
bypassed for testing in special modes only.) These bits specify an
additional division factor to arrive at the COP time-out rate (the clock
used for this module is the E clock).
Write once in normal modes, anytime in special modes. Read
anytime.
Always reads $00.
Writing $55 to this address is the first step of the COP watchdog
sequence.
Writing $AA to this address is the second step of the COP watchdog
sequence. Other instructions may be executed between these writes
but both must be completed in the correct order prior to time-out to
avoid a watchdog reset. Writing anything other than $55 or $AA
causes a COP reset to occur.
Freescale Semiconductor, Inc.
OFF
By:
2
2
2
2
2
2
2
For More Information On This Product,
13
15
17
19
21
22
23
5
5
0
Go to: www.freescale.com
At E = 4.0 MHz
–0 to +2.048 s
131.072 ms
524.288 ms
32.768 ms
Time-Out
2.048 ms
8.192 ms
1.048 s
2.097 s
4
4
0
OFF
Clocks
3
3
0
At E = 8.0 MHz
–0 to +1.024 s
262.144 ms
524.288 ms
1.048576 s
16.384 ms
65.536 ms
Time-Out
1.024 ms
4.096 ms
OFF
2
2
0
1
1
0
–0 to +838.861 ms
At E = 10.0 MHz
209.715 ms
419.430 ms
838.861 ms
13.107 ms
52.429 ms
Time-Out
0.819 ms
3.277 ms
Bit 0
Bit 0
OFF
0
13
. (RTBYP
$0017
10-clock