參數(shù)資料
型號： MC68711E20VFNE2
廠商： Freescale Semiconductor
文件頁數(shù)： 81/138頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 52-PLCC
標(biāo)準(zhǔn)包裝： 23
系列： HC11
核心處理器： HC11
芯體尺寸： 8-位
速度： 4MHz
連通性： SCI，SPI
外圍設(shè)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(zhuǎn)換器： A/D 8x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 105°C
封裝/外殼： 52-LCC（J 形引線）
包裝： 管件
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.
相關(guān)PDF資料
PDF描述
MC68882RC50A IC COPROCESSOR FLOAT PT 68-PGA
MC68908GR16CFJE IC MCU 16K FLASH 8MHZ SPI 32LQFP
MC68E360ZQ25VLR2 IC MPU QUICC 32BIT 357-PBGA
MC68EC000EI8R2 IC MPU 32BIT 85MHZ 68-PLCC
MC68EC030FE25CB1 IC MPU 32BIT ENH 25MHZ 132-CQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC6875 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CLOCK GENERATOR/DRIVER (SCHOTTKY MONOLITHIC INTEGRATED CIRCUIT)
MC6875A 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CLOCK GENERATOR/DRIVER (SCHOTTKY MONOLITHIC INTEGRATED CIRCUIT)
MC6875AL 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CLOCK GENERATOR/DRIVER (SCHOTTKY MONOLITHIC INTEGRATED CIRCUIT)
MC6875L 制造商:MOTOROLA 功能描述:IC
MC688 制造商:未知廠家 制造商全稱:未知廠家 功能描述:INTEGRATED CIRCUITS
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*