參數(shù)資料
型號: ADC12030CIWM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: ADC
英文描述: Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
中文描述: 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝: SOP-16
文件頁數(shù): 38/41頁
文件大小: 1036K
代理商: ADC12030CIWM
Application Hints
(Continued)
’variables
’SET CS# HIGH
OUT
<&amp>H3FC, (<&amp>H2 OR INP (<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HFE AND INP(<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HEF AND INP(<&amp>H3FC))
10
LINE INPUT <&ldquo>DI data for ADC12038 (see Mode Table on data sheet)<&rdquo>; DI$
INPUT <&ldquo>ADC12038 output word length (8,9,12,13,16 or 17)<&rdquo>; DOL
20
’SET CS# HIGH
OUT
<&amp>H3FC, (<&amp>H2 OR INP (<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HFE AND INP(<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
’SET CS# LOW
OUT
<&amp>H3FC, (<&amp>H2 OR INP (<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>H1 OR INP(<&amp>H3FC))
OUT
<&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
DO$=
<&ldquo> <&rdquo>
OUT <&amp>H3FC, (<&amp>H1 OR INP(<&amp>H3FC))
OUT <&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
FOR N=1 TO 8
Temp$=MID$(DI$,N,1)
IF Temp$=<&ldquo>0<&rdquo> THEN
OUT <&amp>H3FC,(<&amp>H1 OR INP(<&amp>H3FC))
ELSE OUT <&amp>H3FC, (<&amp>HFE AND INP(<&amp>H3FC))
END IF
’out DI
OUT <&amp>H3FC, (<&amp>H2 OR INP(<&amp>H3FC))
IF
(INP(<&amp>H3FE) AND 16)=16 THEN
DO$=DO$+<&ldquo>0<&rdquo>
ELSE
DO$=DO$+<&ldquo>1<&rdquo>
END IF
’input DO
OUT <&amp>H3FC, (<&amp>H1 OR INP(<&amp>H3FC))
OUT <&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
NEXT N
IF DOL>8 THEN
FOR N=9 TO DOL
OUT <&amp>H3FC, (<&amp>H1 OR INP(<&amp>H3FC))
OUT <&amp>H3FC, (<&amp>HFD AND INP(<&amp>H3FC))
OUT <&amp>H3FC, (<&amp>H2 OR INP(<&amp>H3FC))
IF (INP(<&amp>H3FE) AND <&amp>H10)=<&amp>H10 THEN
DO$=DO$+<&ldquo>0<&rdquo>
ELSE
DO$=DO$+<&ldquo>1<&rdquo>
END IF
NEXT N
END IF
OUT
<&amp>H3FC, (<&amp>HFA AND INP(<&amp>H3FC))
FOR N=1 TO 500
NEXT N
PRINT DO$
INPUT <&ldquo>Enter <&ldquo>C<&rdquo> to convert else <&ldquo>RETURN<&rdquo> to alter DI
data<&rdquo>; s$
IF s$=<&ldquo>C<&rdquo> OR s$=<&ldquo>c<&rdquo> THEN
GOTO 20
ELSE
GOTO 10
END IF
END
DOL=Data Out word length, DI=Data string for A/D DI input,
DO=A/D result string
’set RTS HIGH
’set DTR LOW
’set RTS LOW
’set B4 low
’set RTS HIGH
’set DTR LOW
’set RTS LOW
’set RTS HIGH
’set DTR HIGH
’set RTS LOW
’reset DO variable
’SET DTR HIGH
’SCLK low
’SCLK high
’SET DTR HIGH
’SCLK low
’SET DTR HIGH
’SCLK low
’SCLK high
’SCLK low and DI high
www.national.com
38
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