1 FEATURES· Single chip LCD controller/driver· 1 or 2-line display of up to 24 characters per line, or2 or 4 lines of up to 12 characters per line· 5 ′ 7 character format plus cursor; 5 ′ 8 for kana(Japanese syllabary) and user defined symbols· On-chip:– generation of LCD supply voltage (external supplyalso possible)– generation of intermediate LCD bias voltages– oscillator requires no external components (externalclock also possible)· Display data RAM: 80 characters· Character generator ROM: 240 characters· Character generator RAM: 16 characters· 4 or 8-bit parallel bus or 2-wire I2C-bus interface· CMOS/TTL compatible· 32 row, 60 column outputs· MUX rates 1 : 32 and 1 : 16· Uses common 11 code instruction set· Logic supply voltage range, VDD - VSS: 2.5 to 6 V· Display supply voltage range, VDD - VLCD: 3.5 to 9 V· Low power consumption· I2C-bus address: 011101 SA0.
標(biāo)簽： 2116 PCF LCD 驅(qū)動(dòng)器芯片
上傳時(shí)間： 2013-11-08
上傳用戶：laozhanshi111
C51 中的關(guān)鍵字關(guān)鍵字 用途 說(shuō)明auto 存儲(chǔ)種類(lèi)說(shuō)明 用以說(shuō)明局部變量，缺省值為此break 程序語(yǔ)句 退出最內(nèi)層循環(huán)case 程序語(yǔ)句 Switch 語(yǔ)句中的選擇項(xiàng)char 數(shù)據(jù)類(lèi)型說(shuō)明 單字節(jié)整型數(shù)或字符型數(shù)據(jù)const 存儲(chǔ)類(lèi)型說(shuō)明 在程序執(zhí)行過(guò)程中不可更改的常量值continue 程序語(yǔ)句 轉(zhuǎn)向下一次循環(huán)default 程序語(yǔ)句 Switch 語(yǔ)句中的失敗選擇項(xiàng)do 程序語(yǔ)句 構(gòu)成do..while 循環(huán)結(jié)構(gòu)double 數(shù)據(jù)類(lèi)型說(shuō)明 雙精度浮點(diǎn)數(shù)else 程序語(yǔ)句 構(gòu)成if..else 選擇結(jié)構(gòu)enum 數(shù)據(jù)類(lèi)型說(shuō)明 枚舉extern 存儲(chǔ)種類(lèi)說(shuō)明 在其他程序模塊中說(shuō)明了的全局變量flost 數(shù)據(jù)類(lèi)型說(shuō)明 單精度浮點(diǎn)數(shù)for 程序語(yǔ)句 構(gòu)成for 循環(huán)結(jié)構(gòu)goto 程序語(yǔ)句 構(gòu)成goto 轉(zhuǎn)移結(jié)構(gòu)if 程序語(yǔ)句 構(gòu)成if..else 選擇結(jié)構(gòu)int 數(shù)據(jù)類(lèi)型說(shuō)明 基本整型數(shù)long 數(shù)據(jù)類(lèi)型說(shuō)明 長(zhǎng)整型數(shù)register 存儲(chǔ)種類(lèi)說(shuō)明 使用CPU 內(nèi)部寄存的變量return 程序語(yǔ)句 函數(shù)返回short 數(shù)據(jù)類(lèi)型說(shuō)明 短整型數(shù)signed 數(shù)據(jù)類(lèi)型說(shuō)明 有符號(hào)數(shù)，二進(jìn)制數(shù)據(jù)的最高位為符號(hào)位sizeof 運(yùn)算符 計(jì)算表達(dá)式或數(shù)據(jù)類(lèi)型的字節(jié)數(shù)static 存儲(chǔ)種類(lèi)說(shuō)明 靜態(tài)變量struct 數(shù)據(jù)類(lèi)型說(shuō)明 結(jié)構(gòu)類(lèi)型數(shù)據(jù)swicth 程序語(yǔ)句 構(gòu)成switch 選擇結(jié)構(gòu)typedef 數(shù)據(jù)類(lèi)型說(shuō)明 重新進(jìn)行數(shù)據(jù)類(lèi)型定義union 數(shù)據(jù)類(lèi)型說(shuō)明 聯(lián)合類(lèi)型數(shù)據(jù)unsigned 數(shù)據(jù)類(lèi)型說(shuō)明 無(wú)符號(hào)數(shù)數(shù)據(jù)void 數(shù)據(jù)類(lèi)型說(shuō)明 無(wú)類(lèi)型數(shù)據(jù)volatile 數(shù)據(jù)類(lèi)型說(shuō)明 該變量在程序執(zhí)行中可被隱含地改變while 程序語(yǔ)句 構(gòu)成while 和do..while 循環(huán)結(jié)構(gòu)ANSIC 標(biāo)準(zhǔn)關(guān)鍵字關(guān)鍵字 用途 說(shuō)明bit 位標(biāo)量聲明 聲明一個(gè)位標(biāo)量或位類(lèi)型的函數(shù)sbit 位標(biāo)量聲明 聲明一個(gè)可位尋址變量
標(biāo)簽： C51
上傳時(shí)間： 2013-10-08
上傳用戶：waves_0801
FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples
上傳時(shí)間： 2013-10-13
上傳用戶：13162218709
The Controller Area Network (CAN) is a serial, asynchronous, multi-master communication protocol forconnecting electronic control modules, sensors and actuators in automotive and industrial applications.With the SJA1000, Philips Semiconductors provides a stand-alone CAN controller which is more than a simpleeplacement of the PCA82C200.Attractive features are implemented for a wide range of applications, supporting system optimization, diagnosisand maintenance.
標(biāo)簽： Stand-alone contro 1000 SJA
上傳時(shí)間： 2013-11-18
上傳用戶：yxgi5
The P82B715 I2C Buffer was designed toextend the range of the local I2C bus out to50 Meters. This application note describesthe results of testing the buffer on severaldifferent types of cables to determine themaximum operating distances possible. Theresults are summarized in a table for easyreference.
標(biāo)簽： extender P82B715 Using I2C
上傳時(shí)間： 2014-12-28
上傳用戶：lou45566
狀態(tài)機(jī)設(shè)計(jì):8.1.1 數(shù)據(jù)類(lèi)型定義語(yǔ)句TYPE語(yǔ)句的用法如下：TYPE 數(shù)據(jù)類(lèi)型名IS 數(shù)據(jù)類(lèi)型定義OF 基本數(shù)據(jù)類(lèi)型;或TYPE 數(shù)據(jù)類(lèi)型名IS 數(shù)據(jù)類(lèi)型定義;TYPE st1 IS ARRAY ( 0 TO 15 ) OF STD_LOGIC ;TYPE week IS (sun，mon，tue，wed，thu，fri，sat) ; 8.1.1 數(shù)據(jù)類(lèi)型定義語(yǔ)句TYPE m_state IS ( st0，st1，st2，st3，st4，st5 ) ;SIGNAL present_state，next_state : m_state ;TYPE BOOLEAN IS (FALSE，TRUE) ；TYPE my_logic IS ( '1' ，'Z' ，'U' ，'0' ) ;SIGNAL s1 : my_logic ;s1 <= 'Z' ;SUBTYPE 子類(lèi)型名IS 基本數(shù)據(jù)類(lèi)型RANGE 約束范圍;SUBTYPE digits IS INTEGER RANGE 0 to 9 ;
標(biāo)簽： 狀態(tài)
上傳時(shí)間： 2013-11-05
上傳用戶：nem567397
Presents short and simple I2C software routines that support onlyslave (rather than master or master & slave) operation and an ASMdemonstration program. The slave-only software in this app notecomplements the master mode software presented in AN464, Usingthe 87LPC76X microcontroller as an I2C bus master.
上傳時(shí)間： 2013-11-22
上傳用戶：1039312764
XAPP520將符合2.5V和3.3V I/O標(biāo)準(zhǔn)的7系列FPGA高性能I/O Bank進(jìn)行連接 The I/Os in Xilinx® 7 series FPGAs are classified as either high range (HR) or high performance (HP) banks. HR I/O banks can be operated from 1.2V to 3.3V, whereas HP I/O banks are optimized for operation between 1.2V and 1.8V. In circumstances that require an HP 1.8V I/O bank to interface with 2.5V or 3.3V logic, a range of options can be deployed. This application note describes methodologies for interfacing 7 series HP I/O banks with 2.5V and 3.3V systems
上傳時(shí)間： 2013-11-19
上傳用戶：yyyyyyyyyy
各種功能的計(jì)數(shù)器實(shí)例（VHDL源代碼）:ENTITY counters IS PORT ( d : IN INTEGER RANGE 0 TO 255; clk : IN BIT; clear : IN BIT; ld : IN BIT; enable : IN BIT; up_down : IN BIT; qa : OUT INTEGER RANGE 0 TO 255; qb : OUT INTEGER RANGE 0 TO 255; qc : OUT INTEGER RANGE 0 TO 255; qd : OUT INTEGER RANGE 0 TO 255; qe : OUT INTEGER RANGE 0 TO 255; qf : OUT INTEGER RANGE 0 TO 255; qg : OUT INTEGER RANGE 0 TO 255; qh : OUT INTEGER RANGE 0 TO 255; qi : OUT INTEGER RANGE 0 TO 255;
標(biāo)簽： VHDL 計(jì)數(shù)器 源代碼
上傳時(shí)間： 2014-11-30
上傳用戶：半熟1994
特點(diǎn) 精確度0.1%滿刻度 ±1位數(shù) 顯示范圍-19999-99999可任意規(guī)劃 可直接量測(cè)直流電流/直流電壓,無(wú)需另接輔助電源 尺寸小(24x48x50mm),穩(wěn)定性高 分離式端子,配線容易 CE 認(rèn)證 2.主要規(guī)格 輔助電源: None 精確度: 0.1% F.S. ±1 digit(1-100%F.S.) 輸入抗阻 : >100Mohm(<2V range) >2Mohm(<2Vrange) < 0.25VA(current ranges) < 1000Vrms(>54V ranges) 最大過(guò)載能力: < 150Vrms(<54V ranges)
上傳時(shí)間： 2013-10-08
上傳用戶：tiantwo
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