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01H
09H
01H
81H
8BH
3. ADC
í¨D2·
PS2103
ú2óD
ADC
￡óDòéóía2
ADC(MAX111/MAX110)
±óàáμí¨Dú￡é
CS
￡
SCLK
￡
BUSY
￡
DIN
￡
DOUT
òy×é3é ￡
CS
ìá1 Do￡
SCLK
ìá1¨Dí2ê±óDo￡
BUSY
ê
ADC
μ|Do￡
DIN
óóúò
ADC
· ￠íüá ￡
DOUT
óóú
ADC
μ×a á1ê3 ￡
MAX111
ê·
±14
μ′DD
ADC
￡a2μ1ù×
REF
+
￠
REF
-
￡ · μ1êè
IN1+
￠
IN1-
￡
IN2+
￠
IN2-
￡ù×μ1 · §
0
1.5V
￡ê3á1· §
-16834
+16833
￡×a ê±
20ms
￡￡¨óD1
MAX111/MAX110
μê μ÷2
1996
ê
MAXIM
êyYêá
7-43
￡
PS2103
úêD ×ˉ±¨ ê±￡
200ms
鱨á1￡úóêμS oóá￠′
DC
2éù2￠±¨ á1 ￡êyY ê°
1-2-2
￡D￡o
ù
DIO
aμ±°
DIO
úμêè×′ì
ù
AD1H
￡
AD1L
±í ê
ADC
í¨μà
1
μá1￡ μíá ×ú￡
ù
AD2H
￡
AD2L
±í ê
ADC
í¨μà
2
μá1￡ êè￡o
15 14 13 8 7 0
D13
D8
D7
D0
×ú
μí×ú
POL
a· o
POL=1
￡a oμ￡
POL=0
￡ayμ￡
OFL
aò3±ê
POL=1
ò
OFL=0
ê±￡ oò3￡
POL=0
ò
OFL=1
ê±￡yò3￡
ò3oˉêy
=POL
¨
OFL
D13
D0
ê
14
têyY￡2éó· ′±í ê ￡
POL
OFL
èy
ó|óêμày
DOUT
V
DD
DI
RO
DE
RE
0.1uF
10K
30pF
30pF
RESET
PS2103
OSC2
OSC1
DIO0
DIO1
DIO2
DIO3
DIO4
DIO4
DIO5
DIO5
RX
TX
DIR
RS-485
MAX485
+5V
4MHz
+5V
A
B
CS
BUSY
SCLK
DIN
DOUT
CS
BUSY
SCLK
MAX111
×￠
*
MAX485
μê ê1ó2
1995 MAXIM
êyYêá
<2-159>
éíD
PS2103
óóú2éˉ· μ1êè￡á· êy×êè￡¨
DIO4
￠
DIO5
￡í · ￠1at
1ü￡¨
DIO0
DIO3
￡￡í¨1yò
MAX485
ó
PC
ú′ú
3 (RS-485
ú￡μ
3E8)
àá ￡
PC
úé
ó|ó3ìDò￡¨
C
ó ￡òéè￡o
1.
3êˉ′DDú3ì Dò
outportb(0x3eb,0x80);
outportb(0x3e9,0x00);
outportb(0x3e8,0x30); /*COM3
2¨ìêa
2400bps*/
outportb(0x3eb,0x03); /*8
êyY
,1
í￡
,
TD￡é
*/
outpotb(0x3ea,0x01);
enable(); /*
′òa
COM3
μóêD
*/
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