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ADC12H032CIWM Datasheet(PDF) 37 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # ADC12H032CIWM
Description  Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
PDF  41 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

ADC12H032CIWM Datasheet(HTML) 37 Page - National Semiconductor (TI)

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Application Hints (Continued)
Power Down instructions do not change these default set-
tings. The following power up sequence should be followed:
1.
Run the program
2.
Prior to responding to the prompt apply the power to the
ADC12038
3.
Respond to the program prompts
It is recommended that the first instruction issued to the
ADC12038 be Auto Cal (see Section 1.1).
’variables
DOL=Data Out word length,
DI=Data string for A/D DI input,
⇒
’
DO=A/D result string
’SET CS# HIGH
OUT
&H3FC, (&H2 OR INP (&H3FC))
’set
RTS HIGH
⇒
OUT
&H3FC, (&HFE AND INP(&H3FC))
’set
DTR LOW
⇒
OUT
&H3FC, (&HFD AND INP(&H3FC))
’set
RTS LOW
⇒
OUT
&H3FC, (&HEF AND INP(&H3FC))
’set
B4 low
⇒
10
LINE INPUT <&ldquo>DI data for ADC12038 (see
Mode Table on data sheet)”; DI$
⇒
INPUT <&ldquo>ADC12038 output word length
(8,9,12,13,16 or 17)”; DOL
⇒
20
’SET CS# HIGH
OUT
&H3FC, (&H2 OR INP (&H3FC))
’set
RTS HIGH
⇒
OUT
&H3FC, (&HFE AND INP(&H3FC))
’set
DTR LOW
⇒
OUT
&H3FC, (&HFD AND INP(&H3FC))
’set
RTS LOW
⇒
’SET CS# LOW
OUT
&H3FC, (&H2 OR INP (&H3FC))
’set
RTS HIGH
⇒
OUT
&H3FC, (&H1 OR INP(&H3FC))
’set
DTR HIGH
⇒
OUT
&H3FC, (&HFD AND INP(&H3FC))
’set
RTS LOW
⇒
DO$=
<&ldquo> ”
’reset
DO variable
⇒
⇒
OUT &H3FC, (&H1 OR INP(&H3FC))
’SET
DTR HIGH
⇒
OUT &H3FC, (&HFD AND
INP(&H3FC))
’SCLK low
⇒
FOR N=1 TO 8
Temp$=MID$(DI$,N,1)
IF Temp$=<&ldquo>0” THEN
OUT &H3FC,(&H1 OR INP(&H3FC))
ELSE OUT &H3FC, (&HFE AND INP(&H3FC))
END IF
’out
DI
⇒
OUT &H3FC, (&H2 OR
INP(&H3FC))
’SCLK high
⇒
IF
(INP(&H3FE) AND 16)=16 THEN
DO$=DO$+<&ldquo>0”
ELSE
DO$=DO$+<&ldquo>1”
END
IF
’input
DO
⇒
⇒
OUT &H3FC, (&H1 OR INP(&H3FC))
’SET
DTR HIGH
⇒
OUT &H3FC, (&HFD AND
INP(&H3FC))
’SCLK low
⇒
NEXT N
IF DOL>8 THEN
FOR N=9 TO DOL
OUT &H3FC, (&H1 OR INP(&H3FC))
’SET
DTR HIGH
⇒
OUT &H3FC, (&HFD AND
INP(&H3FC))
’SCLK low
⇒
OUT &H3FC, (&H2 OR
INP(&H3FC))
’SCLK high
⇒
IF (INP(&H3FE) AND &H10)=&H10 THEN
DO$=DO$+<&ldquo>0”
ELSE
DO$=DO$+<&ldquo>1”
END IF
NEXT N
END IF
OUT
&H3FC, (&HFA AND
INP(&H3FC))
’SCLK low and DI high
⇒
FOR N=1 TO 500
NEXT N
PRINT DO$
INPUT <&ldquo>Enter <&ldquo>C” to convert
else <&ldquo>RETURN” to alter DI data”; s$
⇒
IF s$=<&ldquo>C” OR s$=<&ldquo>c” THEN
GOTO 20
ELSE
GOTO 10
END IF
END
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37



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