参数资料
型号: MC68HC11ED0CFU2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44
封装: QFP-44
文件页数: 8/108页
文件大小: 1672K
代理商: MC68HC11ED0CFU2
Timing System
Pulse Accumulator
MC68HC11ED0 — Rev. 1.0
Technical Summary
Timing System
PEDGE — Pulse Accumulator Edge Control Bit
0 = In event mode, falling edges increment counter. In gated
accumulation mode, high level enables accumulator and falling
edge sets PAIF.
1 = In event mode, rising edges increment counter. In gated
accumulation mode, low level enables accumulator and rising
edge sets PAIF.
DDRA3 — Data Direction for Port A Bit 3
I4/O5 — Input Capture 4/Output Compare Bit
Configure TI4/O5 for input capture or output compare
0 = OC5 enabled
1 = IC4 enabled
RTR[1:0] — RTI Interrupt Rate Select Bits
These two bits select the rate for periodic interrupts. Refer to
Table 9-6. RTI Rates (Period Length)
RTR[1:0]
Period Length
Selected
Period Length
E = 1.0 MHz
E = 2.0 MHz
E = 3.0 MHz
0 0
213
÷ E
8.19 ms
4.096 ms
2.731 ms
0 1
214
÷ E
16.38 ms
8.192 ms
5.461 ms
1 0
215
÷ E
32.77 ms
16.384 ms
10.923 ms
1 1
216
÷ E
65.54 ms
32.768 ms
21.845 ms
Table 9-7. RTI Rates (Frequency)
RTR[1:0]
Rate Selected
Frequency
E = 1.0 MHz
E = 2.0 MHz
E = 3.0 MHz
0 0
E
÷ 213
122.070 Hz
244.141 Hz
366.211 Hz
0 1
E
÷ 214
61.035 Hz
122.070 Hz
183.105 Hz
1 0
E
÷ 215
30.518 Hz
61.035 Hz
91.553 Hz
1 1
E
÷ 216
15.259 Hz
30.518 Hz
45.776 Hz
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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