參數(shù)資料
型號: MC68HC05P9AVP
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 81/158頁
文件大?。?/td> 1106K
代理商: MC68HC05P9AVP
COP
Interrupts
MOTOROLA
COP
81
Clearing the COP
Watchdog
To clear the COP watchdog and prevent a COP reset, write a logic 0 to
bit 0 (COPC) of the COP register at location $1FF0.
If the main program executes within the COP timeout period, the clearing
routine needs to be executed only once. If the main program takes
longer than the COP timeout period, the clearing routine must be
executed more than once.
NOTE:
Place the clearing routine in the main program and not in an interrupt
routine. Clearing the COP watchdog in an interrupt routine might prevent
COP watchdog timeouts even though the main program is not operating
properly.
Interrupts
The COP watchdog does not generate interrupts.
COP Register
The COP register is a write-only register that returns the contents of
EPROM location $1FF0 when read.
COPC — COP Clear
COPC is a write-only bit. Periodically writing a logic 0 to COPC
prevents the COP watchdog from resetting the MCU. Reset clears the
COPC bit.
$1FF0
Bit 7
6
5
4
3
2
1
Bit 0
Read:
D7
D6
D5
D4
D3
D2
D1
D0
Write:
COPC
Reset:
U
U
U
U
U
U
U
0
= Unimplemented
U = Unaffected
Figure 41. COP Register (COPR)
7-cop0cop
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相關(guān)PDF資料
PDF描述
MC68HC05P9ACP HCMOS Microcontroller Unit
MC68HC05P9ADW HCMOS Microcontroller Unit
MC68HC05P9AMDW HCMOS Microcontroller Unit
MC68HC05P9AMP HCMOS Microcontroller Unit
MC68HC05P9AP HCMOS Microcontroller Unit
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05P9DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05P9P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05PV8 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9
MC68HC05PV8A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9
MC68HC05RC16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification