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Transcript
8085 HOW-TO GUIDE Interfacing DAC 0800 with 8085 Contents at a Glance 8085TRAINER KIT .............................................................3 DAC 0800.........................................................................3 INTERFACING DAC WITH 8085..........................................5 PIN ASSIGNMENT WITH PIN ASSIGNMENT WITH 8085 .....5 CIRCUIT DIAGRAM TO INTERFACE DAC 0800 WITH 8085 ...6 ASSEMBLY PROGRAM TO INTERFACE DAC0800 WITH 80857 Join the Technical Community Today! http://www.pantechsolutions.net 8085TRAINER KIT PS-TRAINER-8085 microprocessor trainer kit is proposed to smooth the progress of learning and developing designs of microprocessor from Intel. It has the Facility to connect PC’s 101/104 Keyboard, to enter user programs in Assembly languages. User verifies the programs through LCD or PC. User friendly Firmware confirms facilitating the beginners learns operations of a microprocessor quickly. . DAC 0800 Fig 1 shows DAC0800 series are monolithic 8-bit highspeed current output digital-to-analog converters (DAC) featuring typical settling times of 100 ns.. The noise immune inputs will accept variety of logic levels. The performance and characteristics of the device are essentially unchanged over the ±4.5V to ±18V power supply range and power consumption at only 33 mW with ±5V supplies is independent of logic input levels. Join the Technical Community Today! http://www.pantechsolutions.net Fig 1: pin diagram of DAC 0800 How a DAC works Join the Technical Community Today! http://www.pantechsolutions.net INTERFACING DAC WITH 8085 We now want to we now want to convert the Digital signal to analog voltage by using 8085 trainer board. Here we are using DAC 0800. The DAC 0800 consists of a 8 data lines and REF voltage lines. When the DAC is given the digital input it converts the Digital data to corresponding current, to convert the I to V we use UA 741. PIN ASSIGNMENT WITH PIN ASSIGNMENT WITH 8085 REF VOLTAGE LINES 8085 DAC 0800 V+ Line is given to +12V regulator(7812) V- Line is given to -12V regulator(7912) 78 series in the Regulator IC indicates + voltage 79 series in the Regulator IC indicates - voltage PA.0 D0 PA.1 D1 PA.2 D2 PA.3 D3 PA.4 D4 PA.5 D5 PA.6 D6 PA.7 D7 VCC 40 16 GND 20 3 DAC – DATA LINES DAC 0800 PIN DIAGRAM Supply drawn from MCU/MPU/ Join the Technical Community Today! http://www.pantechsolutions.net CIRCUIT DIAGRAM TO INTERFACE DAC 0800 WITH 8085 Join the Technical Community Today! http://www.pantechsolutions.net ASSEMBLY PROGRAM TO INTERFACE DAC0800 WITH 8085 *************************************************************************************** Title : TO CREATE A SAW-TOOTH WAVE AT THE OUTPUT OF DAC 0800 *************************************************************************************** CNTL: 23 PORT A: 20 MEMORY ADDRESS OPCODE MNEMONICS 9100 3E 80 MVI A,80 9102 D3 23 OUT CNTRL 9104 3E 00 START: MVI A, 00 9106 D3 20 LOOP1: OUT PORTA 9108 3C INR A 9109 C2 06 91 JNZ LOOP1 910C C3 04 91 JMP START Join the Technical Community Today! http://www.pantechsolutions.net Did you enjoy the read? Pantech solutions creates information packed technical documents like this one every month. And our website is a rich and trusted resource used by a vibrant online community of more than 1,00,000 members from organization of all shapes and sizes. Join the Technical Community Today! http://www.pantechsolutions.net What do we sell? Our products range from Various Microprocessor development boards, DSP Boards, FPGA/CPLD boards, Communication Kits, Power electronics, Basic electronics, Robotics, Sensors, Electronic components and much more . Our goal is to make finding the parts and information you need easier and affordable so you can create awesome projects and training from Basic to Cutting edge technology. Join the Technical Community Today! http://www.pantechsolutions.net