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教程资料 Protel使用中的一些问题和解答
Q01、如何使一条走线至两个不同位置零件的距离相同? 
您可先在Design/Rule/High Speed/Matched Net Lengths的规则中来新增规则设定,最
后再用Tools/EqualizeNet Lengths 来等长化即可。
 Q02、在SCHLIB中造一零件其PIN的属性，如何决定是Passive, Input, I/O, Hi-
Z, ...
可编程逻辑 Protel使用中的一些问题和解答
Q01、如何使一条走线至两个不同位置零件的距离相同? 
您可先在Design/Rule/High Speed/Matched Net Lengths的规则中来新增规则设定,最
后再用Tools/EqualizeNet Lengths 来等长化即可。
 Q02、在SCHLIB中造一零件其PIN的属性，如何决定是Passive, Input, I/O, Hi-
Z, ...
单片机编程 8-bit I2C-bus and SMBus IO port with reset
The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion for
SMBus and I2C-bus applications. The PCA9557 consists of an 8-bit input port register,
8-bit output port register, and an I2C-bus/SMBus interface. It has low current consumption
and a high-impedance open-dra ...
单片机编程 68HC05K0 Infra-red Remote Cont
The MC68HC05K0 is a low cost, low pin countsingle chip microcomputer with 504 bytes of userROM and 32 bytes of RAM. The MC68HC05K0 isa member of the 68HC05K series of devices whichare available in 16-pin DIL or SOIC packages.It uses the same CPU as the other devices in the68HC05 family and has the s ...
技术资料 异步升压芯片F5209
DC/DC升压IC特征：
1.操作电压：2.4V-5.5V
2.反馈电压：0.6V（±2%）
3.静态电流：＜1μA
4.PWM调光频率可调：550KHz
5.内部软启动功能:7ms(SS）
6.过电压保护
7.封装：SOT-23-5L
8.工作周期:PWM和PFM开关控制电路(15% ~ 90%)
9.应用：移动电源
FP5209是一种用于广泛运行电压应用的增强拓扑切换调节器。它提供内置的门驱动 ...
资料/手册 LM621无刷电机换向器
General Description
The LM621 is a bipolar IC designed for commutation of
brushless DC motors. The part is compatible with both
three- and four-phase motors. It can directly drive the power
switching devices used to drive the motor. The LM621 provides
an adjustable dead-time circuit to eliminate ``s ...
单片机编程 PCA9539 PCA9539R 16-bit I2C-bu
The PCA9539; PCA9539R is a 24-pin CMOS device that provides 16 bits of GeneralPurpose parallel Input/Output (GPIO) expansion with interrupt and reset forI2C-bus/SMBus applications and was developed to enhance the NXP Semiconductorsfamily of I2C-bus I/O expanders. I/O expanders provide a simple solut ...
嵌入式/单片机编程 The objective is to set up SPI communication between VTI Technologies digital pressure sensor comp
The objective is to set up SPI communication between VTI Technologies digital pressure sensor
component and an MCU of an application device ATMEGA16L. In this code example:
?The MCU is configured
?SCP1000-D01 is initialized and configured
?The high resolution measurement mode is activated
?Temperat ...
技术资料 LM621无刷电机换向器
General Description
The LM621 is a bipolar IC designed for commutation of
brushless DC motors. The part is compatible with both
three- and four-phase motors. It can directly drive the power
switching devices used to drive the motor. The LM621 provides
an adjustable dead-time circuit to eliminate ``s ...
单片机开发 自己制作51开发板. 带自恢复保险丝
自己制作51开发板.
带自恢复保险丝，试验安全，40Pin锁紧插座适用于4～40脚芯片，可以自由配置电源引脚。
板上资源:
1、6个高亮数码管显示（数字和字母显示）
2、8个独立优质按键（2Pin）（人机接口输入）
3、8个高亮发光二极管（跑马灯、指示灯、红绿灯等）
4、标准的RS232通信接口（PC通信）
5、一体化红外接收头（高灵敏 ...