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 auto−clear. On−chip Power−On Resetcircuit protects the internal logic against powering up in the wrongstate.
上传时间： 2013-11-20
上传用户：ynzfm
根据看门狗电路的原理，设计出简单适用、性能可靠的1TrL型看门狗电路以及价格低廉、性能可靠的微功耗CMOS型看门狗电路，同时还介绍了常用的uP监视器O型看门狗电路。关键词：看门狗电路；1TrL型；CMOS型Abstract：In accordance with the principle of WDT (Watch Dog Timer 1circuit，design a，IT．L type WTD circuit，it is a dimple an d applicable an d reliable on performanceo Design a CMOS type WTD circuit，it is low prices and mini-power consumption。Also the article describes a common uP type WTD circuit。Key word：WDT circuit；TFL type；CMOS typ e
上传时间： 2013-11-05
上传用户：685
This document describes the system hardware implementation for the OMAP3530 processor and theTPS65930/20 companion power integrated circuit (IC). The document concentrates on the powerconnectivity for the processor and the companion power IC. The document also briefly explains someother specifics related to power, such as the boot modes and the power-up sequence.
上传时间： 2013-11-14
上传用户：yeling1919
本文介绍了一种基于单片机的健身车转速测量系统。该系统具有电路简单、使用方便等特点。文中详细介绍了该系统的工作原理,并且给出了它的硬件原理图和软件设计程序框图。关键词:转速 单片机 测量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
上传时间： 2013-11-02
上传用户：源弋弋
51单片机及其应用:1.1.1 电子计算机的问世及其经典结构1946年2月15日，第一台电子数字计算机问世，这标志着计算机时代的到来。（CALCULATOR）ENIAC（“埃尼阿克”）◆ENIAC是电子管计算机，时钟频率仅有100 KHz，但能在1秒钟的时间内完成5000次加法运算。◆与现代的计算机相比，有许多不足，但它的问世开创了计算机科学技术的新纪元，对人类的生产和生活方式产生了巨大的影响 。 匈牙利籍数学家冯·诺依曼在方案的设计上做出了重要的贡献。1946年6月，他又提出了“程序存储”和“二进制运算”的思想，进一步构建了计算机由运算器、控制器、存储器、输入设备和输出设备组成这一计算机的经典结构。（EDVAC-ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER）二、微型计算机的应用形态 从应用形态上，微机可以分成三种：
标签： 51单片机
上传时间： 2013-12-20
上传用户：d815185728
The PCA9516 is a BiCMOS integrated circuit intended forapplication in I2C and SMBus systems.While retaining all the operating modes and features of the I2Csystem, it permits extension of the I2C-bus by buffering both the data(SDA) and the clock (SCL) lines, thus enabling five buses of 400 pF.The I2C-bus capacitance limit of 400 pF restricts the number ofdevices and bus length. Using the PCA9516 enables the systemdesigner to divide the bus into five segments off of a hub where anysegment to segment transition sees only one repeater delay.
上传时间： 2013-11-21
上传用户：q123321
The PCA9517 is a CMOS integrated circuit that provides level shifting between lowvoltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I2C-bus or SMBus applications.While retaining all the operating modes and features of the I2C-bus system during thelevel shifts, it also permits extension of the I2C-bus by providing bidirectional buffering forboth the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Usingthe PCA9517 enables the system designer to isolate two halves of a bus for both voltageand capacitance. The SDA and SCL pins are over voltage tolerant and arehigh-impedance when the PCA9517 is unpowered.
标签： translating Level 9517 PCA
上传时间： 2013-12-25
上传用户：wsf950131
The PCA9518 is a BiCMOS integrated circuit intended forapplication in I2C and SMBus systems.While retaining all the operating modes and features of the I2Csystem, it permits extension of the I2C-bus by buffering both thedata (SDA) and the clock (SCL) lines, thus enabling virtuallyunlimited buses of 400 pF.
标签： Expandable 5channel 9518 PCA
上传时间： 2013-10-23
上传用户：dumplin9
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-drain output pin, IO0. The system master can enable the PCA9557’s I/O as either input or output by writing to the configuration register. The system master can also invert the PCA9557 inputs by writing to the active HIGH polarity inversion register. Finally, the system master can reset the PCA9557 in the event of a time-out by asserting a LOW in the reset input. The power-on reset puts the registers in their default state and initializes the I2C-bus/SMBus state machine. The RESET pin causes the same reset/initialization to occur without de-powering the part.
上传时间： 2014-01-18
上传用户：bs2005
The main oscillator allows either a crystal or single-ended input clock signal. Cost-sensitiveapplications typically use an external crystal with the on-chip oscillator circuit since it is the mostcost-effective solution. It is also possible to use the internal oscillator to clock the device after theboot process has completed.
标签： Stellaris Clocking Options for
上传时间： 2013-10-14
上传用户：pol123
