mc68hc11c0 Freescale Semiconductor, Inc, mc68hc11c0 Datasheet - Page 51

• Manufacturer Part Number: mc68hc11c0
• Description: 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

PACTL — Pulse Accumulator Control
Bit 7 — Not implemented
PAEN — Pulse Accumulator System Enable
PAMOD — Pulse Accumulator Mode
PEDGE — Pulse Accumulator Edge Control
Bit 3 — Not implemented
I4/O5 — Input Capture 4/Output Compare 5
RTR[1:0] — Real-Time Interrupt Rate
PACNT — Pulse Accumulator Counter
MC68HC11C0
MC68HC11C0TS/D
RESET:
Always reads zero
Always reads zero
Refer to 7 Main Timer.
These two bits select the rate for periodic interrupts. Refer to the following table.
Can be read and written, unaffected by reset.
RTR[1:0]
0 = Pulse accumulator disabled
1 = Pulse accumulator enabled
0 = Event counter
1 = Gated time accumulation
0 0
0 1
1 0
1 1
Bit 7
Bit 7
Bit 7
—
0
PAMOD
PAEN
0
0
1
1
6
0
6
6
Divide E Into
Freescale Semiconductor, Inc.
PAMOD
2
2
2
2
E =
For More Information On This Product,
13
14
15
16
5
0
5
5
Table 11 Real-Time Interrupt Rates
PEDGE
Go to: www.freescale.com
PEDGE
0
1
0
1
4
0
4
4
XTAL = 4.0 MHz
16.38 ms
32.77 ms
65.54 ms
1.0 MHz
8.19 ms
—
3
0
3
3
PAI Falling Edge Increments the Counter.
PAI Rising Edge Increments the Counter.
A Zero on PAI Inhibits Counting.
A One on PAI Inhibits Counting.
I4/O5
2
0
2
2
XTAL = 8.0 MHz
Action on Clock
16.384 ms
32.768 ms
4.096 ms
8.192 ms
2.0 MHz
RTR1
1
0
1
1
RTR0
$0026
$0027
Bit 0
Bit 0
Bit 0
0
XTAL = 12.0 MHz
10.923 ms
21.845 ms
2.731 ms
5.461 ms
3.0 MHz
MOTOROLA
51