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參數(shù)資料
| 型號： | MC68HC705P6ADW |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 26/98頁 |
| 文件大?。?/td> | 532K |
| 代理商： | MC68HC705P6ADW |
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Resets
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
32
Freescale Semiconductor
The POR will generate the RST signal and reset the MCU. If any other reset function is active at the end
of this 4064 internal clock cycle delay, the RST signal will remain active until the other reset condition(s)
end.
4.3.2 Computer Operating Properly (COP) Reset
When the COP watchdog timer is enabled (COP bit in the MOR is set), the internal COP reset is
generated automatically by a timeout of the COP watchdog timer. This timer is implemented with an
18-stage ripple counter that provides a timeout period of 65.5 ms when a 4-MHz oscillator is used. The
COP watchdog counter is cleared by writing a logical 0 to bit zero at location $1FF0.
The COP watchdog timer can be disabled by clearing the COP bit in the MOR or by applying 2 x VDD to
the IRQ/VPP pin (for example, during bootloader). When the IRQ/VPP pin is returned to its normal
operating voltage range (between VSS–VDD), the COP watchdog timer’s output will be restored if the COP
bit in the mask option register (MOR) is set.
The COP register is shared with the least significant byte (LSB) of an unused vector address as shown
in Figure 4-2. Reading this location will return the programmed value of the unused user interrupt vector,
usually 0. Writing to this location will clear the COP watchdog timer.
When the COP watchdog timer expires, it will generate the RST signal and reset the MCU. If any other
reset function is active at the end of the COP reset signal, the RST signal will remain in the reset condition
until the other reset condition(s) end. When the reset condition ends, the MCU’s operating mode will be
selected (see Table 3-1. Operating Mode Conditions After Reset).
Address:
$1FF0
Bit 7
654321
Bit 0
Read:
00000000
Write:
COPR
= Unimplemented
Figure 4-2. Unused Vector and COP Watchdog Timer
相關PDF資料 |
PDF描述 |
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| MC68HC705P6AMDW | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC705P6AMDWER2 | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC705P6ASD | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER |
| MC68HC705P6AMDWR2 | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC705P6ASD | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC705P6AMDW | 功能描述:IC MCU 4.6K OTP 2.1MHZ 28-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| MC68HC705P6AMP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HC705P6CDW | 制造商:Motorola Inc 功能描述: |
| MC68HC705P6CP | 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: |
| MC68HC705P6ECDW | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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