ML2280CIS View Datasheet(PDF) - Micro Linear Corporation

Part Name

Description

Manufacturer

ML2280CIS

Serial I/O 8-Bit A/D Converters

Micro Linear Corporation 

ML2280, ML2283

APPLICATIONS

CH0

CS

CLK

ML2283

DI

CH3

DO

P13

P12

8051

P11

P10

8051 Interface and Controlling Software

MNEMONIC

INSTRUCTION

START: ANL

MOV

MOV

P1, #0F7H

B, #5

A, #ADDR

;SELECT A/D (CS = 0)

;BIT COUNTER ¨ 5

;A ¨ MUX BIT

LOOP 1: RRC

JC

A

ONE

;CY ¨ ADDRESS BIT

;TEST BIT

;BIT = 0

ZERO: ANL

SJMP

P1, #0FEH

CONT

;DI ¨ 0

;CONTINUE

;BIT = 1

ONE: ORL

P1, #1

;D1 ¨ 1

CONT:

ACALL

DJNZ

ACALL

MOV

PULSE

B, LOOP 1

PULSE

B, #8

;PULSE SK 0 Æ 1 Æ 0

;CONTINUE UNTIL DONE

;EXTRA CLOCK FOR SYNC

;BIT COUNTER ¨ 8

LOOP 2: ACALL

MOV

RRC

RRC

MOV

RLC

MOV

DJNZ

PULSE

A, P1

A

A

A, C

A

C, A

B, LOOP 2

;PULSE SK 0 Æ 1 Æ 0

;CY ¨ DO

;A ¨ RESULT

;A(0) BIT ¨ AND SHIFT

;C ¨ RESULT

;CONTINUE UNTIL DONE

RETI

;PULSE SUBROUTINE

PULSE:

ORL

NOP

ANL

RET

P1, #04

P1, #0FBH

;SK ¨ 1

;DELAY

;SK ¨ 0

14

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