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one-WIRE

三降壓穩壓器功能的1-Wire動態可編程輸出電壓

The LTC®3569 is a compact power solution for handhelddevices. Its tiny 3mm × 3mm QFN package includesthree buck regulators with individually programmableoutput voltages. One regulator supports load currentsup to 1200mA, while the other two support currents to600mA. Two regulators can be paralleled for increasedload capability. Each current-mode regulator is internallycompensated with excellent load and line regulation. Acomplete 2- or 3-output solution requires a minimumof external passive components.

標簽： Wire 降壓穩壓器動態可編程

上傳時間： 2013-10-11

上傳用戶：yxgi5
PCA954X家庭的I C SMBus多路復用器與開關

The Philips family of Multiplexers and Switches consists of bi-directional translating switches controlled via the I2C or SMBus to fan out an upstream SCL/SDA pair to 2, 4 or 8 downstream channels of SCx/SDx pairs. The Multiplexers allow only one downstream channel to be selected at a time, while the Switches allow any individual downstream channel or combination of downstream channels to be selected, depending on the content of the programmable control register. Once one or several channels have been selected, the device acts as a wire, allowing the master on the upstream channel to send commands to devices on all the active downstream channels, and devices on the active downstream channels to communicate with each other and the master. External pull-up resistors are used to pull each individual channel up to the desired voltage level. Combined interrupt output and hardware reset input are device options that are featured.

標簽： SMBus 954X PCA 954

上傳時間： 2013-10-11

上傳用戶：dianxin61
Reading and Writing iButtons v

Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types of iButtons required for a project and the type of computer to be used, the most economical interface is easily found. The hardware examples shown are basically two different types: 5V general interface and 12V RS-232 interface. Within the 5V group a common printed circuit board could be used for all circuits described. The variations can be achieved by different populations of components. The same principal is used for the 12V RS-232 interface. The population determines if it is a Read all or a Read/Write all type of interface. There are other possible circuit implementations to create a 1-Wire interface. The circuits described in this application note cover many different configurations. For a custom application, one of the described options can be adapted to meet individual needs.

標簽： iButtons Reading Writing and

上傳時間： 2013-10-29

上傳用戶：long14578
DS1820 C51 子程序 (一線數據傳輸)

//芯片資料請到www.elecfans.com查找 //DS1820 C51 子程序//這里以11.0592M晶體為例，不同的晶體速度可能需要調整延時的時間//sbit DQ =P2^1;//根據實際情況定義端口 typedef unsigned char byte;typedef unsigned int word; //延時void delay(word useconds){ for(;useconds>0;useconds--);} //復位byte ow_reset(void){ byte presence; DQ = 0; //pull DQ line low delay(29); // leave it low for 480us DQ = 1; // allow line to return high delay(3); // wait for presence presence = DQ; // get presence signal delay(25); // wait for end of timeslot return(presence); // presence signal returned} // 0=presence, 1 = no part //從 1-wire 總線上讀取一個字節byte read_byte(void){ byte i; byte value = 0; for (i=8;i>0;i--) { value>>=1; DQ = 0; // pull DQ low to start timeslot DQ = 1; // then return high delay(1); //for (i=0; i<3; i++); if(DQ)value|=0x80; delay(6); // wait for rest of timeslot } return(value);} //向 1-WIRE 總線上寫一個字節void write_byte(char val){ byte i; for (i=8; i>0; i--) // writes byte, one bit at a time { DQ = 0; // pull DQ low to start timeslot DQ = val&0x01; delay(5); // hold value for remainder of timeslot DQ = 1; val=val/2; } delay(5);} //讀取溫度char Read_Temperature(void){ union{ byte c[2]; int x; }temp; ow_reset(); write_byte(0xCC); // Skip ROM write_byte(0xBE); // Read Scratch Pad temp.c[1]=read_byte(); temp.c[0]=read_byte(); ow_reset(); write_byte(0xCC); //Skip ROM write_byte(0x44); // Start Conversion return temp.x/2;}

標簽： 1820 C51 DS 程序

上傳時間： 2013-11-03

上傳用戶：hongmo
Verilog語言中wire與reg的區別以及inout使用

wire和reg的用法以及inout的相關問題

標簽： Verilog inout wire reg

上傳時間： 2013-11-05

上傳用戶：zgu489
Create a 1-Wire Master with Xilinx PicoBlaze

Abstract: Designers who must interface 1-Wire temperature sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to drive a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.

標簽： PicoBlaze Create Master Xilinx

上傳時間： 2013-11-05

上傳用戶：a6697238
1-Wire總線主機

Abstract: Communication with 1-Wire slave devices requires a 1-Wire master. There are numerous ways to build a 1-Wire master (see reference design 4206, "Choosing the Right 1-Wire Master for Embedded Applications"). Thisdocument describes the DS1WM, a synthesizable 1-Wire master that can be implemented in an application-specificintegrated circuit (ASIC) or field-programmable gate array (FPGA).

標簽： Wire 總線主機

上傳時間： 2014-12-22

上傳用戶：xanxuan
如何構建一個1-Wire評估套件

Abstract: The 1-Wire product family includes numerous devices that can be easily evaluated using a Windows®-based

標簽： Wire 評估套件

上傳時間： 2013-10-12

上傳用戶：fudong911
Verilog語言中wire與reg的區別以及inout使用

wire和reg的用法以及inout的相關問題

標簽： Verilog inout wire reg

上傳時間： 2013-10-10

上傳用戶：wd450412225
Create a 1-Wire Master with Xilinx PicoBlaze

Abstract: Designers who must interface 1-Wire temperature sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to drive a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.

標簽： PicoBlaze Create Master Xilinx

上傳時間： 2013-11-12

上傳用戶：大三三