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| 型号： | MC68HC705J1AVP |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers |
| 中文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| 封装： | PLASTIC, DIP-20 |
| 文件页数： | 16/108页 |
| 文件大小： | 718K |
| 代理商： | MC68HC705J1AVP |
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Introduction
MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
16
Freescale Semiconductor
1.4.1 V
DD
and V
SS
V
DD
and V
SS
are the power supply and ground pins. The MCU operates from a single power supply.
Very fast signal transitions occur on the MCU pins, placing high, short-duration current demands on the
power supply. To prevent noise problems, take special care, as
Figure 1-3
shows, by placing the bypass
capacitors as close as possible to the MCU. C2 is an optional bulk current bypass capacitor for use in
applications that require the port pins to source high current levels.
Figure 1-3. Bypassing Layout Recommendation
1.4.2 OSC1 and OSC2
The OSC1 and OSC2 pins are the connections for the on-chip oscillator. The oscillator can be driven by
any of the following:
1.
Standard crystal (See
Figure 1-4
and
Figure 1-5
.)
2.
Ceramic resonator (See
Figure 1-6
and
Figure 1-7
.)
3.
Resistor/capacitor (RC) oscillator (Refer to
Appendix A MC68HRC705KJ1
.)
4.
External clock signal as shown in (See
Figure 1-8
.)
5.
Low speed (32 kHz) crystal connections (Refer to
Appendix B MC68HLC705KJ1
.)
The frequency, f
OSC
, of the oscillator or external clock source is divided by two to produce the internal
operating frequency, f
OP
.
1.4.2.1 Crystal Oscillator
Figure 1-4
and
Figure 1-5
show a typical crystal oscillator circuit for an AT-cut, parallel resonant crystal.
Follow the crystal supplier’s recommendations, as the crystal parameters determine the external
component values required to provide reliable startup and maximum stability. The load capacitance
values used in the oscillator circuit design should include all stray layout capacitances.
To minimize output distortion, mount the crystal and capacitors as close as possible to the pins. An
internal startup resistor of approximately 2 M
is provided between OSC1 and OSC2 for the crystal
oscillator as a programmable mask option.
NOTE
Use an AT-cut crystal and not an AT-strip crystal because the MCU can
overdrive an AT-strip crystal.
C1
C2
MCU
C1
0.1
μ
F
C2
V+
+
V
DD
V
SS
V
DD
V
SS
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相关代理商/技术参数 |
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| MC68HC705J2CDW | 制造商:Motorola Inc 功能描述: 制造商:Motorola Inc 功能描述:MicroController, 8-Bit, 20 Pin, Plastic, SOP |
| MC68HC705J2DW | 制造商:Motorola Inc 功能描述: |
| MC68HC705J5ACP | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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| MC68HC705JJ7CDW | 功能描述:IC MCU 8BIT 20-SOIC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 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... 其它名称:497-9032STM32F101T8U6-ND |
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