详细介绍: PMC860-40-E1-75液晶显示的原理是利用液晶的物理特性,通过电压对其显示区域进行控制,有电就有显示,这样即可显示出图形。液晶显示器按其显示方式分为点阵式、段式、字符式等。点阵液晶显示器具有体积小、重量轻、外形薄、耗能小、工作电压低、无辐射,特别是视域宽、显示信息量大等优点。
液晶显示屏通过一个20脚的插座与主芯片相连,通过一个50K的可调电阻调节驱动电压的大小控制液晶的亮度,通过两个三极管控制液晶的背光,如图10所示。P1.5控制液晶显示数据/显示指令数据,P1.6控制数据的读/写,P1.7控制使能信号,P2的8个引脚作为数据引脚,P3.0和P3.1作为液晶的片选信号,P4.1控制液晶的背光显示。
通信接口电路设计
PMC860-40-E1-75通信接口担负与外围的串行主机数据交换和支持打印等任务。串行通讯只需较少的端口就可以实现单片机和PC机的互通,具有无可比拟的优势。MSP430 系列都有USART模块来实现串行通信。在本设计中,MSP430F149的USART模块通过RS232串口与外围的串行主机通信。系统采用专用电平转换芯片MAX3232来实现电平转换,如图11所示。MAX3232芯片是MAXIM公司生产的电平转换芯片,包含两路接收器和驱动器,性能可靠。
PMC860-40-E1-75正弦波的来源采用直接从市电的220 V/50 Hz的正弦波,利用电压互感器变换成较低电压的50Hz正弦波(例如5 V)。该正弦波的谐波失真度取决于市电的谐波失真度和互感器的参数,其输出幅度由D/A转换器控制光电耦合器驱动电路实现,D/A转换器输出信号控制光电耦合器导通程度,与分压电阻分压后产生交流和直流叠加的电压,经电容隔离直流分量,仅保留交流分量送运算放大器进行若干倍的放大,产生随D/A信号幅度大小而控制的纯净交流信号量。由三角波发生电路产生150 kHz的三角波,由低频正弦波产生电路产生50 Hz的正弦波。两个信号分别同时送到比较器的同相和反相输入端,在比较器的输出端将产生矩形波。该矩形波的频率与150 kHz的三角波相同,该矩形波的脉冲宽度受50 Hz正弦波实时幅度的调制后,随50 Hz正弦波实时幅度而变化,即已调制矩形波。将其送到高速电子开关中一个输入端,并经过一级反向器反向,送到高速电子开关的另外一个输入端。
----商务热线---厦门兴锐达自动化设备有限公司
联系人:王文光
++QQ:2851759104
手机:15359273780
电话:0592-5580707 400-855-5103转001
传真:0592-5361289
邮箱:2851759103@qq.com
网址:http://www.xmxrdauto.com
PMC860-40-E1-75
SCSI-BP4
IOBP-731
IOBP-10
IBC-20-1
SYS68K/PIO-1
CPCI-910
CPU-5V/64-110-2/C13
Force SYS68K CPU-30Lite
FORCE SYS68K DRAM VME BOARD MVME MAINFRAME MOTOROLA
Force SYS68K/CPU-6 880-12537-101.A2 LAM 810-17034-300-1
FORCE SYS68K SRAM-4A VME BOARD MVME MAINFRAME MOTOROLA
Force SYS68K/CPU-6VB P/N 100611 LAM reseach 17034-3-C
FORCE SYS68K ISCSI-1 VME BOARD MVME MAINFRAME MOTOROLA
FORCE COMPUTERS SYS68K CPU-6A
FORCE SYS68K CPU-2VF VME SINGLE BOARD COMPUTER MOTOROLA
FORCE SYS68K CPU-30BE/16 VME BOARD
Force SYS68K/SIO-2 P/N 310004
Force SYS68K CPU-33B/4 VME Board
Force SYS68K/SASI-1
FORCE CONTROL BOARD SYS68K ISI0-2/C2 (P/N 220062)
FORCE COMPUTER MODEL SYS68K SASI-1441 LAM REV A
FORCE COMPUTER CPU BOARD SYS68K CPU-1B NEW-NO BOX
Force SYS68K CPU30ZBE CPU-30ZBE CPU Module VMEbus VME
FORCE SYS68K CPU BOARD 310004 WORKING
Force SYS68K/CPU-33B/4 VME Board CAT#: 510098
FORCE COMPUTERS SYS68K/CPU-6VA USPP SYS68KCPU6VA CIRCUIT CARD
BUS TRONIC FORCE SYS68K MAINFRAME BOARDS NICE LOT
Force SYS68K/ISIO-2 I/O Controller Board PN: 310031
Force SYS68K ISIO-1 Serial I/O Board
BioRad SYS68K CPU-30ZBE FORCE 25MHZ VME CPU BOARD
FORCE COMPUTER VME BOARD MODEL SYS68K REV C
FORCE SYS68K ISIO-2 MODULE ASSY
Force SYS68K/ISIO-1FP I/O Controller Dual Board 310034
Force SYS68K/CPU-33B/4 VME Board CAT#: 510098 PN: 600-1
Force SYS68K/CPU-30BE SYS68K/CPU-30BE/16/C2 VME Module
Force SYS68K/CPU-33B/4 VME Board CAT#: 510098
Force SYS68K/ISIO-1FP I/O Controller Dual Board w Cable
Force SYS68K/ISIO-1FP I/O Controller Dual Board 310034
FORCE PROCESSOR BOARD Model SYS68K ASCU-2
Force SYS68K/ISIO-2 I/O
NEW PHOENIX CONTACT FL SWITCH SF 15TX/FX ORD. NO. 2832661
NIB VERO ELECTRONICS GARDNER-DENVER NT400 POWER SUPPLY 1.1F 110V 960485
ALLEN BRADLEY 1747-KFC15/A CONTROLNET RS-323 INTERFACE MODULE P/N: 96255874 A01
NIB FACTORY SEALED ALLEN BRADLEY 1794-ACN15 FLEX I/O 1794-ACN15
ENDRESS+HAUSER TH14 TEMPERATURE SENSOR NEW
NEW TELEMOTIVE E80070 PC BOARD WITH COMPONENTS
NEW DATALOGIC DAL 90A301230 OM-DRAGON BASE/CHARGER
DATAMETRICS S-9328A-1500 ENCODER TRU-MITE S9328A1500
NEW BOSCH 081WV06P1V1004K?E115/60 D51 VALVE 081WV06P1V1004KE
NEW TUBOSCOPE INC ASSY # 338667 BOARD 338666 REV. 1
GE-FANUC IC610PER151D PRINTER INTERFACE UNIT
RELIANCE ELECTRIC 0-54341 PC BOARD 1200A M RECT 054341
NEW ALLEN BRADLEY 837-V2 TEMPERATURE CONTROLLER 837V2 SER. A
ATLAS COPCO 4240-0311-81 SERVO CONTROLLER QMS-340-15, 4240031181-0004?, QMS34015
OMEGA OS1200-LTS TEMPERATURE CONTROLLER OMEGASCOPE OS1200LTS
ATLAS COPCO 4240-0311-80 SERVO CONTROLLER QMS-340-15, 4240031180, QMS34015
ATLAS COPCO 4240-0311-80 SERVO CONTROLLER QMS-340-15, 4240031181-0004?, QMS34015
FOXBORO 843DP-A0V1SS-M ELECTRONIC TRANSMITTER 843DPA0V1SSM
FACTORY SEALED KRP-C-1000SP HI-CAP FUSE KRPC1000SP
NIB PHOENIX CONTACT IB STME 24 DO 32/2 INTERBUS MODULE 2754370
ALLEN BRADLEY 1771-IFE/C ANALOG 1771-IFE/C 1771IFE C
NEW INDUSTRIAL DEVICES CONTROL AC-2001E ELECTRIC CYLINDER CONTROL AC2001E
NIB NORGREN 0880228 PRESSURE SWITCH W/ CABLE CONNECTOR
INFINITY ANDOVER CONTROLS EMX-190A EXPANSION MODULE EMX190A
GENERAL ELECTRIC 3S7505SL530D6 PHOTOELECTRIC LIGHT SOURCE
PARKER HYDRAULIC VALVE DIV. PRDM2AA06SNG NIB
F/S SIEMENS 6ES7-321-1EH01-0AA0 SIMATIC S7 INPUT MODULE
|