MC68HC912BD32 Datasheet, PDF (108/292 Pages) Freescale Semiconductor, Inc – Advance Information

Clocks
Freescale Semiconductor, Inc.
RTR2, RTR1, RTR0 — Real-Time Interrupt Rate Select
Read and write anytime.
Rate select for real-time interrupt. The clock used for this module is
the E clock.
Table 21 Real Time Interrupt Rates
RTR2 RTR1 RTR0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Divide E
By:
OFF
2¹³
2¹⁴
2¹⁵
2¹⁶
2¹⁷
2¹⁸
2¹⁹
Time-Out Period
E = 4.0 MHz
OFF
2.048 ms
4.096 ms
8.192 ms
16.384 ms
32.768 ms
65.536 ms
131.072 ms
Time-Out Period
E = 8.0 MHz
OFF
1.024 ms
2.048 ms
4.096 ms
8.192 ms
16.384 ms
32.768 ms
65.536 ms
Time-Out Period
E = 10.0 MHz
OFF
0.819 ms
1.638 ms
3.277 ms
6.554 ms
13.107 ms
26.214 ms
52.429 ms
RTIFLG — Real-Time Interrupt Flag Register
$0015
Bit 7
6
5
4
3
2
1
Bit 0
RTIF
0
0
0
0
0
0
0
RESET:
0
0
0
0
0
0
0
0
RTIF — Real-Time Interrupt Flag
This bit is cleared automatically by a write to this register with this bit
set.
0 = Time-out has not yet occurred.
1 = Set when the time-out period is met.
COPCTL — COP Control Register
$0016
RESET:
RESET:
Bit 7
CME
0
0
6
FCME
0
0
5
FCM
0
0
4
FCOP
0
0
3
DISR
0
1
2
CR2
0
0
1
CR1
0
0
Bit 0
CR0
1
1
Normal
Special
CME — Clock Monitor Enable
Read and write anytime.
If FCME is set, this bit has no meaning nor effect.
MC68HC912BD32 Rev 1.0
Clocks
For More Information On This Product,
Go to: www.freescale.com
8-clock