參數(shù)資料
型號(hào): MC68HC11F1CFN3R2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC68
封裝: PLASTIC, LCC-68
文件頁數(shù): 79/174頁
文件大?。?/td> 981K
代理商: MC68HC11F1CFN3R2
MC68HC11F1
PIN DESCRIPTIONS
MOTOROLA
TECHNICAL DATA
2-3
2.2 Reset (RESET)
An active low bidirectional control signal, RESET, acts as an input to initialize the MCU
to a known start-up state. It also acts as an open-drain output to indicate that an inter-
nal failure has been detected in either the clock monitor or COP watchdog circuit. The
CPU distinguishes between internal and external reset conditions by sensing whether
the reset pin rises to a logic one in less than two E-clock cycles after a reset has oc-
curred. It is not advisable to connect an external resistor-capacitor (RC) power-up de-
lay circuit to the reset pin of M68HC11 devices because the circuit charge time
constant can cause the device to misinterpret the type of reset that occurred. Refer to
SECTION 5 RESETS AND INTERRUPTS for further information.
Figure 2-3 illustrates a reset circuit that uses an external switch. Other circuits can be
used, however, it is important to incorporate a low voltage interrupt (LVI) circuit to pre-
vent operation at insufficient voltage levels which could result in erratic behavior or cor-
ruption of RAM.
Figure 2-3 External Reset Circuit
2.3 E-Clock Output (E)
E is the output connection for the internally generated E clock. The signal from E is
used as a timing reference. The frequency of the E-clock output is one fourth that of
the input frequency at the EXTAL pin. When E-clock output is low, an internal process
is taking place. When it is high, data is being accessed. All clocks, including the E
clock, are halted when the MCU is in STOP mode. The E clock can be turned off in
single-chip modes to reduce the effects of radio frequency interference (RFI). Refer to
2.4 Crystal Driver and External Clock Input (XTAL, EXTAL)
These two pins provide the interface for either a crystal or a CMOS-compatible clock
to control the internal clock generator circuitry. Either a crystal oscillator or a CMOS
compatible clock can be used. The resulting E-clock rate is the input frequency divided
by four.
MANUAL
RESET SWITCH
4.7 k
TO RESET
OF M68HC11
4.7 k
VDD
MC34064
IN
GND
2
3
1
RESET
1.0
F
4.7 k
VDD
MC34164
IN
GND
2
3
1
RESET
OPTIONAL POWER-ON DELAY
AND MANUAL RESET SWITCH
相關(guān)PDF資料
PDF描述
MC68HC11F1CFN3R2 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC68
MC68SZ328VH66V 66 MHz, RISC PROCESSOR, PBGA196
MC74F2970N DRAM CONTROLLER, PDIP24
MC908GP32CFBR2 8-BIT, FLASH, 8.2 MHz, MICROCONTROLLER, PQFP44
MC908GP32CFBR2 8-BIT, FLASH, 8.2 MHz, MICROCONTROLLER, PQFP44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC11F1CFN4 功能描述:IC MCU 512 EEPROM 4MHZ 68-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)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(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB(64K x 8) 程序存儲(chǔ)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(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)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
MC68HC11F1CFN4R2 功能描述:IC MCU 1K RAM 4MHZ 68-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 標(biāo)準(zhǔn)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(shè)備:POR,PWM,溫度傳感器,WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB(20K x 16) 程序存儲(chǔ)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(zhuǎn)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
MC68HC11F1CFN5 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Technical Summary 8-Bit Microcontroller
MC68HC11F1CFU 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers
MC68HC11F1CFU1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers