參數(shù)資料
型號(hào)： MC68HC05C9ACFN
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4.2 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 102/160頁
文件大小： 783K
代理商： MC68HC05C9ACFN
NON-DISCLOSURE
AGREEMENT
REQUIRED
Resets
General Release Specification
MC68HC05C9A — Rev. 4.0
46
Resets
MOTOROLA
5.5 Computer Operating Properly (COP) Reset
This device includes a watchdog COP feature which guards against
program run-away failures. A timeout of the computer operating properly
(COP) timer generates a COP reset. The COP watchdog is a software
error detection system that automatically times out and resets the MCU
if not cleared periodically by a program sequence.
The COP is controlled with two registers; one to reset the COP timer and
the other to enable and control COP and clock monitor functions. Figure
5-3 shows a block diagram of the COP.
Figure 5-3. COP Block Diagram
÷2 ÷2 ÷2 ÷2 ÷2 ÷2 ÷2 ÷2
÷4
÷2
213
215
217
219
221
COPRST
CM0
CM1
16 BIT TIMER SYSTEM
INTERNAL
CPU
CLOCK
COP
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