參數(shù)資料
型號: MC68711E20CFNE2
廠商: Freescale Semiconductor
文件頁數(shù): 81/138頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 20K FLASH 52-PLCC
標準包裝: 23
系列: HC11
核心處理器: HC11
芯體尺寸: 8-位
速度: 2MHz
連通性: SCI,SPI
外圍設備: POR,WDT
輸入/輸出數(shù): 38
程序存儲器容量: 20KB(20K x 8)
程序存儲器類型: OTP
EEPROM 大?。?/td> 512 x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 8x8b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 52-LCC(J 形引線)
包裝: 管件
產品目錄頁面: 723 (CN2011-ZH PDF)
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
47
Chapter 4
Resets, Interrupts, and Low-Power Modes
4.1 Introduction
This section describes the internal and external resets and interrupts of the MC68HC711D3 and its two
low power-consumption modes.
4.2 Resets
The microcontroller unit (MCU) can be reset in any of these four ways:
1.
An active-low input to the RESET pin
2.
A power-on reset (POR) function
3.
A clock monitor failure
4.
A computer operating properly (COP) watchdog timer timeout
The RESET input consists mainly of a Schmitt trigger that senses the RESET line logic level.
4.2.1 RESET Pin
To request an external reset, the RESET pin must be held low for at least eight E-clock cycles, or for one
E-clock cycle if no distinction is needed between internal and external resets.
4.2.2 Power-On Reset (POR)
Power-on reset occurs when a positive transition is detected on VDD. This reset is used strictly for power
turn on conditions and should not be used to detect any drop in the power supply voltage. If the external
RESET pin is low at the end of the power-on delay time, the processor remains in the reset condition until
RESET goes high.
4.2.3 Computer Operating Properly (COP) Reset
The MCU contains a watchdog timer that automatically times out unless it is serviced within a specific
time by a program reset sequence. If the COP watchdog timer is allowed to timeout, a reset is generated,
which drives the RESET pin low to reset the MCU and the external system.
In the MC68HC711D3, the COP reset function is enabled out of reset in normal modes. If the user does
not want the COP enabled, he must write a 1 to the NOCOP bit of the configuration control register
(CONFIG) after reset. This bit is writable only once after reset in normal modes (see 2.3.3 Configuration
Control Register for more information). Protected control bits (CR1 and CR0) in the configuration options
register (OPTION) allow the user to select one of the four COP timeout rates. Table 4-1 shows the
relationship between CR1 and CR0 and the COP timeout period for various system clock frequencies.
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相關代理商/技術參數(shù)
參數(shù)描述
MC68711E20CFNE2 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC68711E20CFNE3 功能描述:8位微控制器 -MCU 8B 20K EPROM 768RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68711E20CFNE4 功能描述:8位微控制器 -MCU 8B 20K EPROM 768RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68711E20CFUE2 功能描述:IC MCU 8BIT 64-QFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 標準包裝:1 系列:AVR® ATmega 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C,SPI,UART/USART 外圍設備:欠壓檢測/復位,POR,PWM,WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB(16K x 16) 程序存儲器類型:閃存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:44-TQFP 包裝:剪切帶 (CT) 其它名稱:ATMEGA324P-B15AZCT
MC68711E20CFUE3 功能描述:IC MCU 8BIT 64-QFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 標準包裝:1 系列:AVR® ATmega 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C,SPI,UART/USART 外圍設備:欠壓檢測/復位,POR,PWM,WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB(16K x 16) 程序存儲器類型:閃存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:44-TQFP 包裝:剪切帶 (CT) 其它名稱:ATMEGA324P-B15AZCT