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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 ...
其他 The first task at hand is to set up the endpoints appropriately for this example. The following code
The first task at hand is to set up the endpoints appropriately for this example. The following code switches the CPU clock speed
to 48 MHz (since at power-on default it is 12 MHz), and sets up EP2 as a Bulk OUT endpoint, 4x buffered of size 512, and EP6
as a Bulk IN endpoint, also 4x buffered of si ...
其他书籍 DESCRIPTION The DCP0105 family is a series of high efficiency, 5V input isolated DC/DC converters.
DESCRIPTION
The DCP0105 family is a series of high efficiency, 5V
input isolated DC/DC converters. In addition to 1W
nominal galvanically isolated output power capability,
the range of DC/DCs are also fully synchronizable.
The devices feature thermal shutdown, and overload
protection is implemented ...
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 ...
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 ...
技术资料 PIC16F1937_SIMPLE_IO
本範例為 PIC16F1937 的 Simple I/O Demo
主要在示範規劃 ANSELx 的重要性 (ANSELA , ANSELB ... ) 並且
(1) 利用 __CONFIG 來在程式中直接做 Configuration bits 的設定
(2) 規劃 OSCCON , 將 Internal RC 操作頻率由 Power-On 的 500K 切換至 16Mhz
(3) 透過 #define 的定義讓程式有較好的可讀性
(4) 得到一個最簡單 ...
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 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 ...
技术资料 FC162中文版说明书v21
FC162是一款低功耗，高速，高噪声容限，EPROM/ROM基于8位CMOS工艺制造的单片机，采用RISC指令集，共有42条指令，
除分支指令为两个周期指令以外其余为单周期指令。这种易用、易记的指令集大大缩短了开发时间。
FC162包含了上电复位(Power-on Reset POR)，掉电复位(Brown-out Reset BOR)， 上电复位计数器（Power-up Reset ...