參數(shù)資料
型號: MC68HC05J1
廠商: Motorola, Inc.
英文描述: HCMOS MICROCONTROLLER UNIT
中文描述: HCMOS微控制器
文件頁數(shù): 46/82頁
文件大?。?/td> 327K
代理商: MC68HC05J1
MOTOROLA
7-4
TIMER
MC68HC705J2
Rev. 2
1
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7.3 COP Timer
Three counter stages at the end of the timer make up the computer operating
properly (COP) timer. (See
Figure 7-1
.) The COP timer is a software error
detection system that automatically times out and resets the MCU if not cleared
periodically by a program sequence. Writing a zero to bit 0 of the COP register
clears the COP timer and prevents a COP timer reset. (See
Figure 7-4
.)
Figure 7-4. COP Register (COPR)
COPC — COP Clear
This write-only bit resets the COP timer. Reading address $0FF0 returns the
EPROM data at that address.
COPR —
COP Register
$0FF0
MC68HC05J1 Emulation Mode:
$07F0
Bit 7
6
5
4
3
2
1
Bit 0
COPC
0
RESET
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