Interfacing to External Static Ram This module colntroller is for srams
標簽: Interfacing colntroller External Static
上傳時間: 2017-09-24
上傳用戶:Late_Li
Static electricity is the most ancient form of electricity known to humans. More than 2000 years ago, the Greeks recognized the attraction between certain mate- rials when they were rubbed together; indeed, the word electricity comes from the Greek elektron, which means amber. During the seventeenth and eighteenth centuries, several key experiments were conducted to understand and measure Static electricity. But the discovery of electromagnetism and its formidable break- through has rapidly outgrown interest in Static electricity. Even today, where the industrial applications of Static electricity are not insignificant, they cannot compare with those of electromagnetism and electrodynamics.
標簽: Understand Discharge Electro Static
上傳時間: 2020-06-05
上傳用戶:shancjb
經典書籍Static Timing Analysis for Nanometer Designs A Practical Approach漢化版本,非常有用
標簽: 靜態(tài)時序分析
上傳時間: 2021-12-06
上傳用戶:
■ High Performance, Low Power AVR? 8-Bit Microcontroller ■ Advanced RISC Architecture –120 Powerful Instructions – Most Single Clock Cycle Execution –32 x 8 General Purpose Working Registers –Fully Static Operation
標簽: Atmel
上傳時間: 2013-06-01
上傳用戶:tccc
高壓動態(tài)無功補償及濾波裝置(TCR型SCV)SVC=FC+TCRTCR: Thyristor Controlled Reactor 晶閘管控制電抗器SCV: Static
上傳時間: 2013-07-21
上傳用戶:Miyuki
現(xiàn)有基于MAX7219芯片的數(shù)碼管驅動電路只適用于小尺寸LED,為擴展其使用范圍,在介紹動態(tài)顯示芯片MAX7219功能的基礎上,提出了一個基于該芯片的8位高亮度8英寸數(shù)碼管驅動電路。電路保留了MAX7219芯片的功能強大、編程簡單等優(yōu)點,通過74LS273鎖存器和ULN2803達林頓驅動器,實現(xiàn)了對任意大尺寸數(shù)碼管提供較高電壓和電流驅動的靜態(tài)顯示,并亮度可調。 Abstract: The existing display-driving circuit based on MAX7219 was only applicable to small-size LED. To expand its use, based on the function introduction of dynamic display chip MAX7219, a display-driving circuit for high-brightness 8-bit LED with the size of 8-inch was proposed. The advantages of MAX7219 were retained, such as powerful function and simple programming. Static display with adjustable brightness for large-size LED with higher voltage and current was achieved with the help of 74LS273 and ULN2803.
上傳時間: 2013-10-23
上傳用戶:31633073
C51 中的關鍵字關鍵字 用途 說明auto 存儲種類說明 用以說明局部變量,缺省值為此break 程序語句 退出最內層循環(huán)case 程序語句 Switch 語句中的選擇項char 數(shù)據(jù)類型說明 單字節(jié)整型數(shù)或字符型數(shù)據(jù)const 存儲類型說明 在程序執(zhí)行過程中不可更改的常量值continue 程序語句 轉向下一次循環(huán)default 程序語句 Switch 語句中的失敗選擇項do 程序語句 構成do..while 循環(huán)結構double 數(shù)據(jù)類型說明 雙精度浮點數(shù)else 程序語句 構成if..else 選擇結構enum 數(shù)據(jù)類型說明 枚舉extern 存儲種類說明 在其他程序模塊中說明了的全局變量flost 數(shù)據(jù)類型說明 單精度浮點數(shù)for 程序語句 構成for 循環(huán)結構goto 程序語句 構成goto 轉移結構if 程序語句 構成if..else 選擇結構int 數(shù)據(jù)類型說明 基本整型數(shù)long 數(shù)據(jù)類型說明 長整型數(shù)register 存儲種類說明 使用CPU 內部寄存的變量return 程序語句 函數(shù)返回short 數(shù)據(jù)類型說明 短整型數(shù)signed 數(shù)據(jù)類型說明 有符號數(shù),二進制數(shù)據(jù)的最高位為符號位sizeof 運算符 計算表達式或數(shù)據(jù)類型的字節(jié)數(shù)Static 存儲種類說明 靜態(tài)變量struct 數(shù)據(jù)類型說明 結構類型數(shù)據(jù)swicth 程序語句 構成switch 選擇結構typedef 數(shù)據(jù)類型說明 重新進行數(shù)據(jù)類型定義union 數(shù)據(jù)類型說明 聯(lián)合類型數(shù)據(jù)unsigned 數(shù)據(jù)類型說明 無符號數(shù)數(shù)據(jù)void 數(shù)據(jù)類型說明 無類型數(shù)據(jù)volatile 數(shù)據(jù)類型說明 該變量在程序執(zhí)行中可被隱含地改變while 程序語句 構成while 和do..while 循環(huán)結構ANSIC 標準關鍵字關鍵字 用途 說明bit 位標量聲明 聲明一個位標量或位類型的函數(shù)sbit 位標量聲明 聲明一個可位尋址變量
標簽: C51
上傳時間: 2013-10-08
上傳用戶:waves_0801
16 16點陣顯示漢字原理及顯示程序 #include "config.h" #define DOTLED_LINE_PORT PORTB #define DOTLED_LINE_DDR DDRB #define DOTLED_LINE_PIN PINB #define DOTLED_LINE_SCKT PB1 #define DOTLED_LINE_SCKH PB5 #define DOTLED_LINE_SDA PB3 #define DOTLED_ROW_PORT PORTC #define DOTLED_ROW_DDR DDRC #define DOTLED_ROW_PIN PINC #define DOTLED_ROW_A0 PC0 #define DOTLED_ROW_A1 PC1 #define DOTLED_ROW_A2 PC2 #define DOTLED_ROW_A3 PC3 #define DOTLED_ROW_E PC4 uint8 font[] = { /*-- 調入了一幅圖像:這是您新建的圖像 --*/ /*-- 寬度x高度=16x16 --*/ 0x00,0x00,0x00,0x00,0x08,0x38,0x18,0x44,0x08,0x44,0x08,0x04,0x08,0x08,0x08,0x10, 0x08,0x20,0x08,0x40,0x08,0x40,0x08,0x40,0x3E,0x7C,0x00,0x00,0x00,0x00,0x00,0x00 }; Static void TransmitByte(uint8 byte); Static void SelectRow(uint8 row); Static void FlipLatchLine(void); Static void TransmitByte(uint8 byte) { uint8 i; for(i = 0 ; i < 8 ; i ++) { if(byte & (1 << i)) { DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SDA); } else { DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SDA); } //__delay_cycles(100); DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SCKH); //__delay_cycles(100); DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SCKH); //__delay_cycles(100); } } Static void SelectRow(uint8 row) { //row -= 1; row |= DOTLED_ROW_PIN & 0xe0; DOTLED_ROW_PORT = row; } Static void FlipLatchLine(void) { DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SCKT); DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SCKT); } void InitDotLedPort(void) { DOTLED_LINE_PORT &= ~(_BV(DOTLED_LINE_SCKT) | _BV(DOTLED_LINE_SCKH)); DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SDA); DOTLED_LINE_DDR |= _BV(DOTLED_LINE_SCKT) | _BV(DOTLED_LINE_SCKH) | _BV(DOTLED_LINE_SDA); DOTLED_ROW_PORT |= 0x1f; DOTLED_ROW_PORT &= 0xf0; DOTLED_ROW_DDR |= 0x1f; } void EnableRow(boolean IsEnable) { if(IsEnable) { DOTLED_ROW_PORT &= ~_BV(DOTLED_ROW_E); } else { DOTLED_ROW_PORT |= _BV(DOTLED_ROW_E); } } void PrintDotLed(uint8 * buffer) { uint8 i , tmp; for(i = 0 ; i < 16 ; i ++) { tmp = *buffer ++; TransmitByte(~tmp); tmp = *buffer ++; TransmitByte(~tmp); SelectRow(i); FlipLatchLine(); } } void main(void) { InitDotLedPort(); EnableRow(TRUE); while(1) { PrintDotLed(font); __delay_cycles(5000); } } //---------------------------------------------------- config.h文件 #ifndef _CONFIG_H #define _CONFIG_H //#define GCCAVR #define CPU_CYCLES 7372800L #ifndef GCCAVR #define _BV(bit) (1 << (bit)) #endif #define MSB 0x80 #define LSB 0x01 #define FALSE 0 #define TRUE 1 typedef unsigned char uint8; typedef unsigned int uint16; typedef unsigned long uint32; typedef unsigned char boolean; #include <ioavr.h> #include <inavr.h> #include "dotled.h" #endif //-----
上傳時間: 2013-11-18
上傳用戶:mnacyf
存儲器技術.doc 計算機的主存儲器(Main Memory),又稱為內部存儲器,簡稱為內存。內存實質上是一組或多組具備數(shù)據(jù)輸入輸出和數(shù)據(jù)存儲功能的集成電路。內存的主要作用是用來存放計算機系統(tǒng)執(zhí)行時所需要的數(shù)據(jù),存放各種輸入、輸出數(shù)據(jù)和中間計算結果,以及與外部存儲器交換信息時作為緩沖用。由于CPU只能直接處理內存中的數(shù)據(jù) ,所以內存是計算機系統(tǒng)中不可缺少的部件。內存的品質直接關系到計算機系統(tǒng)的速度、穩(wěn)定性和兼容性。 4.1 存儲器類型計算機內部存儲器有兩種類型,一種稱為只讀存儲器ROM(Read Only Memiry),另一種稱為隨機存儲器RAM(Random Access Memiry)。 4.1.1 只讀存儲器只讀存儲器ROM主要用于存放計算機固化的控制程序,如主板的BIOS程序、顯卡BIOS控制程序、硬盤控制程序等。ROM的典型特點是:一旦將數(shù)據(jù)寫入ROM中后,即使在斷電的情況下也能夠永久的保存數(shù)據(jù)。從使用上講,一般用戶能從ROM中讀取數(shù)據(jù),而不能改寫其中的數(shù)據(jù)。但現(xiàn)在為了做一日和尚撞一天鐘于軟件或硬件程序升級,普通用戶使用所謂的閃存(Flash Memiry)也可以有條件地改變ROM中的數(shù)據(jù)。有關只讀存儲器ROM的內容將在第11章中介紹,本章主要介紹隨機存儲器。4.1.2 隨機存取存儲器隨機存取存儲器RAM的最大特點是計算機可以隨時改變RAM中的數(shù)據(jù),并且一旦斷電,TAM中數(shù)據(jù)就會立即丟失,也就是說,RAM中的數(shù)據(jù)在斷電后是不能保留的。從用于制造隨機存取存儲器的材料上看,RAM又可分為靜態(tài)隨機存儲器SRAM(Static RAM)和動態(tài)隨機存儲器DRAM(Dymamic RAM)兩種。1. 動態(tài)隨機存儲器在DRAM中數(shù)據(jù)是以電荷的形式存儲在電容上的,充電后電容上的電壓被認為是邏輯上的“1”,而放電后的電容上的電壓被認為是邏輯上的“0”認。為了減少存儲器的引腳數(shù),就反存儲器芯片的每個基本單元按行、列矩陣形式連接起來,使每個存儲單元位于行、列的交叉點。這樣每個存儲單元的地址做一日和尚撞一天鐘可以用位數(shù)較少的行地址和列地址兩個部分表示,在對每個單元進行讀寫操作時,就可以采用分行、列尋址方式寫入或讀出相應的數(shù)據(jù),如圖4-1所示。 由于電容充電后,電容會緩慢放電,電容 上的電荷會逐漸
標簽: 存儲器
上傳時間: 2014-01-10
上傳用戶:18752787361
設計一種應用于某全地形ATV車載武器裝置中的中控系統(tǒng),該系統(tǒng)設計是以TMS320F2812型DSP為核心,采用模塊化設計思想,對其硬件部分進行系統(tǒng)設計,能夠完成對武器裝置高低、回轉方向的運動控制,實現(xiàn)靜止或行進狀態(tài)中對目標物的測距,自動瞄準以及按既定發(fā)射模式發(fā)射彈丸和各項安全性能檢測等功能。通過編制相應的軟件,對其進行系統(tǒng)調試,驗證了該設計運行穩(wěn)定。 Abstract: A central control system applied to an ATV vehicle weapons is designed. The system design is based on TMS320F2812 DSP as the core, uses modular design for its hardware parts. The central control system can complete the motion control of the level of weapons and equipment, rotation direction, to achieve a state of Static or moving objects on the target ranging, auto-targeting and according to the established target and the projectile and the launch of the security performance testing and other functions. Through the development of appropriate software and to carry out system testing to verify the stability of this design and operation.
標簽: ATV-ATT DSP 中控系統(tǒng)
上傳時間: 2013-11-02
上傳用戶:jshailingzzh