參數(shù)資料
型號: MC68HC11ED0VFU2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 97/108頁
文件大小: 1672K
代理商: MC68HC11ED0VFU2
Timing System
Introduction
MC68HC11ED0 — Rev. 1.0
Technical Summary
Timing System
Table 9-1. Timer Summary
Common System Frequencies
Definition
Control Bits
4.0 MHz
8.0 MHz
12.0 MHz
XTAL
1.0 MHz
2.0 MHz
3.0 MHz
E
PR[1:0]
Main Timer Count Rates (Period Length)
0 0
1 count —
overflow —
1000 ns
65.536 ms
500 ns
32.768 ms
333 ns
21.845 ms
1
÷ E
216
÷ E
0 1
1 count —
overflow —
4.0
s
262.14 ms
2.0
s
131.07 ms
1.333
s
87.381 ms
4
÷ E
218
÷ E
1 0
1 count —
overflow —
8.0
s
524.28 ms
4.0
s
262.14 ms
2.667
s
174.76 ms
8
÷ E
219
÷ E
1 1
1 count —
overflow —
16.0
s
1.049 s
8.0
s
524.29 ms
5.333
s
349.52 ms
16
÷ E
220
÷ E
RTR[1:0]
Periodic (RTI) Interrupt Rates (Period Length)
0 0
0 1
1 0
1 1
8.192 ms
16.384 ms
32.768 ms
65.536 ms
4.096 ms
8.192 ms
16.384 ms
32.768 ms
2.731 ms
5.461 ms
10. 923 ms
21.845 ms
213
÷ E
214
÷ E
215
÷ E
216
÷ E
CR[1:0]
COP Watchdog Timeout Rates (Period Length)
0 0
0 1
1 0
1 1
32.768 ms
131.072 ms
524.288 ms
2.098 s
16.384 ms
65.536 ms
262.14 ms
1.049 s
10.923 ms
43.691 ms
174.76 ms
699.05 ms
215
÷ E
217
÷ E
219
÷ E
221
÷ E
Timeout tolerance
(–0 ms
/+...)
32.8 ms
16.4 ms
10.9 ms
215
÷ E
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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