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參數(shù)資料
| 型號： | MC68HC705BD7B |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP42 |
| 封裝： | SDIP-42 |
| 文件頁數(shù)： | 31/85頁 |
| 文件大?。?/td> | 302K |
| 代理商： | MC68HC705BD7B |
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SECTION 5: RESETS
MOTOROLA
Page 27
MC68HC05BD7 Rev. 2.0
GENERAL RELEASE SPECIFICATION
PRELIMINARY
SECTION 5
RESETS
The MCU can be reset from four sources—1 external and 3 internal:
External RESET pin
Power-On-Reset (POR)
Computer Operating Properly Watchdog Reset (COPR)
Illegal Address Reset (ILADR)
5.1
External Reset (RESET)
The RESET pin is the only external reset source. This pin is connected to a Schmitt trigger
input gate to provide an upper and lower threshold voltage separated by a minimum
amount of hysteresis. This external reset occurs whenever the RESET pin is pulled below
the lower threshold and remains in reset until the RESET pin rises above the upper
threshold. This active low input will generate the RST signal and reset the CPU and
peripherals. Termination of the external RESET input can alter the operating mode of the
MCU.
NOTE:
Activation of the RST signal is generally referred to as reset of the device,
unless otherwise specified.
5.2
Internal Resets
The three internally generated resets are the initial power-on reset, the COP Watchdog
Timer reset, and the illegal address reset
5.2.1
Power-On Reset (POR)
The internal POR is generated on power-up to allow the clock oscillator to stabilize. The
POR is strictly for power-on condition and is not able to detect a drop in the power supply
voltage (brown-out). There is an oscillator stabilization delay of 4065 internal processor bus
clock cycles (PH2) after the oscillator becomes active.
The POR will generate the RST signal which will reset the CPU. If any other reset function
is active at the end of this 4065 cycles delay, the RST signal will remain in the reset
condition until the other reset condition(s) end.
5.2.2
Computer Operating Properly Reset (COPR)
The internal COPR reset is generated automatically (if enabled) by a time-out of the COP
Watchdog Timer. This time-out occurs if the counter in the COP Watchdog Timer is not
reset (cleared) within a specific time by a program reset sequence. Refer to SECTION 11
for more information on this time-out feature.
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相關代理商/技術參數(shù) |
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|---|---|
| MC68HC705BD7P1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HC705C4ACP | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC705C8AB | 功能描述:IC MCU 8K OTP 2.1MHZ 42-SDIP 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 |
| MC68HC705C8ACB | 制造商:Rochester Electronics LLC 功能描述:HCO5 CORE + 8K RAM + EPR - Bulk |
| MC68HC705C8ACFB | 功能描述:IC MCU 8K 4MHZ OTP 44-QFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
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