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| 型号： | MC68HC705J5A |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | 8-bit microcontroller units |
| 中文描述： | 8位微控制器单元 |
| 文件页数： | 15/106页 |
| 文件大小： | 670K |
| 代理商： | MC68HC705J5A |
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July 16, 1999
GENERAL RELEASE SPECIFICATION
GENERAL DESCRIPTION
REV 2.1
1-5
1.
2.
3.
A crystal as shown in
A ceramic resonator as shown in
An external clock signal as shown in
The frequency, f
OSC
, of the oscillator or external clock source is divided by two to
produce the internal operating frequency, f
Figure 1-3
(a)
Figure 1-3
Figure 1-3
(a)
(b)
OP
.
Crystal Oscillator
The circuit in
resonant crystal. The crystal manufacturer’s recommendations should be fol-
lowed, 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 capacitances.
The crystal and components should be mounted as close as possible to the pins
for start-up stabilization and to minimize output distortion. An internal start-up
resistor is provided between OSC1 and OSC2/R for the crystal type oscillator.
Figure 1-3
(a) shows a typical oscillator circuit for an AT-cut, parallel
Figure 1-3. Oscillator Connections
Ceramic Resonator Oscillator
In cost-sensitive applications, a ceramic resonator can be used in place of the
crystal. The circuit in
Figure 1-3
(a) can be used for a ceramic resonator. The res-
onator manufacturer’s recommendations should be followed, as the resonator
parameters determine the external component values required for maximum sta-
bility and reliable starting. The load capacitance values used in the oscillator cir-
cuit design should include all stray capacitances. The ceramic resonator and
components should be mounted as close as possible to the pins for start-up stabi-
lization and to minimize output distortion. An internal start-up resistor is provided
between OSC1 and OSC2/R for the ceramic resonator type oscillator.
External Clock
An external clock from another CMOS-compatible device can be connected to the
OSC1 input, with the OSC2/R input not connected, as shown in
Figure 1-3
(b).
MCU
37pF
OSC1
OSC2/R
37 pF
R
OSC
unconnected
External Clock
OSC1
OSC2/R
MCU
(a) Crystal or ceramic
resonator connection
(b) External clock source
connection
R
OSC
: see Section 11. Electrical Specifications.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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| MC68HC705JP7CDW | 功能描述:IC MCU 8BIT 28-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 |
| MC68HC705JP7CP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
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