How to Interface ADC 0809 with 8085

Interfacing ADC 0809 with 8085

Tags: Interfacing ADC0809 with 8085,ADC0809 interfacing with 8085,ADC Programming using 8085,ADC 0809 Tutorials,
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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.


ADC 0809

The ADC0808, ADC0809 data acquisition component is a Monolithic CMOS device with an 8-bit analog-to-digital converter,8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive approximations the conversion technique. The converter features a high impedance chopper stabilized comparator, a 256R voltage divider with analog switch tree and a successive approximation register.


INTERFACING ADC 0809 WITH 8085

8085 microprocessor it doesn’t have an On chip ADC to accept the digital input, it will not accept analog input, so we need a ADC to process the analog signal. For interfacing ADC 0809 we require 8 data lines.


So ADC 0809 is an 8 bit ADC has 8 channels works on successive approximation conversion technique


PIN ASSIGNMENT WITH 8085

 


 

8255

ADC 0809

ADC 0809

Data lines

PA0

D0

adc-0809

PA1

D1

PA2

D2

PA3

D3

PA4

D4

PA5

D5

PA6

D6

PA7

D7

Control Lines

PB0

E0C

PB1

A0

PB2

A1

PB3

A2

PB4

Start

PB5

ALE

PB6

OE

PB7

NC

PWR

17,19

Vcc

Supply form 8085/8086/80805 trainer Kit

18,20

Gnd


 

 
CIRCUIT DIAGRAM TO INTERFACE ADC 0809 WITH 8085



circuit-diagram-to-interface-adc-0809-with-8085



ASSEMBLY PROGRAM TO INTERFACE ADC 0809 WITH 8085

***************************************************************************************


Title : TO CAPTURE THE DATA AT CHANNEL - 0 AND STORE IN MEMORY LOCATION


***************************************************************************************


  MEMORY ADDRESS

OPCODE

MNEMONICS

8500

3E 98

MVI A,98

8502

D3 23

OUT 23

8504

3E 01

MVI A,01

8506

D3 21

OUT 21

8508

3E 01

MVI A,01

850A

D3 21

OUT 21

850C

00

NOP

850D

00

NOP

850E

00

NOP

850F

3E 21

MVI A,21

8511

D3 21

OUT 21

8513

00

NOP

8514

00

NOP

8515

00

NOP

8516

3E 01

M: MVI A,01

8518

D3 21

OUT 21

851A

E6 01

ANI 01

851C

CA 16 85

JZ M

851F

3E 40

MVI A,40

8521

D3 21

OUT 21

8523

00

NOP

8524

00

NOP

8525

DB 20

IN 20

8527

CF

RST1


 

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