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ML2281 Datasheet(PDF) 16 Page - Micro Linear Corporation |
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ML2281 Datasheet(HTML) 16 Page - Micro Linear Corporation |
16 / 26 page ML2281, ML2282, ML2284, ML2288 16 APPLICATIONS 8051 Interface and Controlling Software MNEMONIC INSTRUCTION START ANL P1, #0F7H ;SELECT A/D (CS = 0) MOV B, #5 ;BIT COUNTER ¬ 5 MOV A, #ADDR ;A ¬ MUX BIT LOOP 1: RRC A ;CY ¬ ADDRESS BIT JC ONE ;TEST BIT ;BIT = 0 ZERO: ANL P1, #0FEH ;DI ¬ 0 SJMP CONT ;CONTINUE ;BIT = 1 ONE: ORL P1, #1 ;D1 ¬ 1 CONT: ACALL PULSE ;PULSE SK 0 ® 1 ® 0 DJNZ B, LOOP 1 ;CONTINUE UNTIL DONE ACALL PULSE ;EXTRA CLOCK FOR SYNC MOV B, #8 ;BIT COUNTER ¬ 8 LOOP 2: ACALL PULSE ;PULSE SK 0 ® 1 ® 0 MOV A, P1 ;CY ¬ DO RRC A RRC A MOV A, C ;A ¬ RESULT RLC A ;A(0) BIT ¬ AND SHIFT MOV C, A ;C ¬ RESULT DJNZ B, LOOP 2 ;CONTINUE UNTIL DONE RETI ;PULSE SUBROUTINE PULSE: ORL P1, #04 ;SK ¬ 1 NOP ;DELAY ANL P1, #0FBH ;SK ¬ 0 RET CH0 ML2288 8051 P13 P12 P11 P10 CS CLK DI DO CH7 |
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