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參數(shù)資料
| 型號： | MC68HC705J2P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HCMOS MICROCONTROLLER UNIT |
| 中文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 16/82頁 |
| 文件大?。?/td> | 327K |
| 代理商： | MC68HC705J2P |
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MOTOROLA
2-2
PIN DESCRIPTIONS
MC68HC705J2
Rev. 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
2.1 V
DD
and V
SS
V
DD
and V
SS
are the power supply and ground pins. The MCU operates from a
single 5-V power supply.
Very fast signal transitions occur on the MCU pins. The short rise and fall times
place very high short-duration current demands on the power supply. To prevent
noise problems, take special care to provide good power supply bypassing at the
MCU. Use bypass capacitors with good high-frequency characteristics, and
position them as close to the MCU as possible. Bypassing requirements vary,
depending on how heavily loaded the MCU pins are.
2.2 OSC1 and OSC2
The OSC1 and OSC2 pins are the control connections for the on-chip oscillator.
Connect any of the following to the OSC1 and OSC2 pins:
A crystal (Refer to
Figure 2-2
.)
A ceramic resonator (Refer to
Figure 2-2
)
An external clock signal (Refer to
Figure 2-3
)
The MCU divides the frequency, f
osc
, of the oscillator or external clock source by
two to produce the internal operating frequency, f
op
.
2.2.1 Crystal
The circuit in
Figure 2-2
shows a typical crystal oscillator circuit for a parallel
resonant crystal. Follow the crystal supplier's recommendations, as the crystal
parameters determine the external component values required to provide
maximum stability and reliable start-up. The load capacitance values used in the
oscillator circuit design should include all stray layout capacitances. Mount the
crystal and components as close as possible to the pins for start-up stabilization
and to minimize output distortion.
2.2.2 Ceramic Resonator
In cost-sensitive applications, use a ceramic resonator in place of the crystal. Use
the circuit in
Figure 2-2
for a ceramic resonator, and follow the resonator
manufacturer's recommendations, as the resonator parameters determine the
external component values required for maximum stability and reliable starting.
The load capacitance values used in the oscillator circuit design should include all
stray layout capacitances.
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| MC68HC705J5ACP | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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| MC68HC705JP7CDW | 功能描述:IC MCU 8BIT 28-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 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(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 |
| MC68HC705JP7CP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
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