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嵌入式Linux This research project evaluates startup times of the linux boot process from power-on until user log
This research project evaluates startup times of the linux boot process from power-on until user login.
Time consuming parts of the boot process are investigated and methods how to speed up the whole
process are discussed.
单片机开发 pic example code ,such as pic watch dog, power on and power off ,reset
pic example code ,such as pic watch dog, power on and power off ,reset
Windows Mobile Calculates power drain for wlan, BT, backlight etc and shows the results. Good to know, what setting
Calculates power drain for wlan, BT, backlight etc and shows the results. Good to know, what setting consumes most of the battery power on your windows mobile / Pocket PC.
电源技术 主板电源接口详解(图解)
计算机的ATX电源脱离主板是需要短接一下20芯接头上的绿色（power on）和黑色（地）才能启动的。启动后把万用表拨到主流电压20V档位，把黑表笔插入4芯D型插头的黑色接线孔中，用红表笔分别测量各个端子的电压。楼上列的是20芯接头的端子电压，4芯D型插头的电压是黄色＋12V，黑色地，红色＋5V。 
主板电源接口&nbsp ...
电源技术 简单、高效USB电源管理IC解决方案
 
Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The LTC3455 seamlessly manages power flowbetween an AC adapter, USB cable and Li-ion battery,while complying with U ...
单片机编程 CAT93C46 器件数据手册
The CAT93C46 is a 1 kb Serial EEPROM memory device which isconfigured as either 64 registers of 16 bits (ORG pin at VCC) or 128registers of 8 bits (ORG pin at GND). Each register can be written (orread) serially by using the DI (or DO) pin. The CAT93C46 features aself−timed internal write with ...
单片机编程 PCA9549 Octal bus switch with
The PCA9549 provides eight bits of high speed TTL-compatible bus switching controlledby the I2C-bus. The low ON-state resistance of the switch allows connections to be madewith minimal propagation delay. Any individual A to B channel or combination of channelscan be selected via the I2C-bus, determi ...
单片机编程 PCA9548A 8 channel I2C bus swi
The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individualSCx/SDx channel or combination of channels can be selected, determined by thecontents of the programmable control register.An ...
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 Replacement of NXP PCA9518 wit
The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as described above. The power-on reset of the PCA9518A keeps the outputsturned off during power-up and maintains the high impedance of the outputs throughout the power-upcycle. The ...