mc68hc11d0 Freescale Semiconductor, Inc, mc68hc11d0 Datasheet - Page 102

• Manufacturer Part Number: mc68hc11d0
• Description: Mc68hc11d0 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9-16
MAIN TIMER
(FROM MAIN TIMER)
PAI/OC1
FROM
Pulse accumulator control bits are also located within two timer registers, TMSK2 and
TFLG2, as described in the following paragraphs.
E ÷ 64 CLOCK
OC1
PA7/
Pulse Accumulator (in Gated Mode)
Cycle Time
CPU Clock
(E/2
(E/2
OUTPUT
BUFFER
14
6
)
)
EDGE DETECTION
INPUT BUFFER
PACTL
&
Freescale Semiconductor, Inc.
Table 9-3 Pulse Accumulator Timing
Selected Crystal
For More Information On This Product,
Figure 9-3 Pulse Accumulator
overflow -
1 count -
TMSK2
(1/E)
(E)
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TIMING SYSTEM
16.384 ms
4.0 MHz
1.0 MHz
1000 ns
64.0 µs
MUX
2:1
INTERNAL
DATA BUS
Common XTAL Frequencies
PAI EDGE
PAEN
OVERFLOW
ENABLE
8.192 ms
8.0 MHz
2.0 MHz
32.0 µs
500 ns
TFLG2
8-BIT COUNTER
PACNT
FLAG SETTING
TECHNICAL DATA
DISABLE
11 PULSE ACC BLOCK
INTERRUPT
REQUESTS
1
2
12.0 MHz
5.461 ms
21.33 µs
3.0 MHz
333 ns