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ADC-16 USER GUIDE
The Base Address Switch
The factory-set Base Address is 300h (768 decimal).
If this address is already in use, change the setting
of the Base Address Switch (refer to Figure 2-2 for
the address-setting arrangement of the Switch).
Any new Base Address setting must be within the
range of O O O h to 3FFh
(0
to 1023 Decimal) on an 8-
byte boundary. Use the Table 2-1 as an aid to
selecting a Base Address.
ADDRESS
ADDRESS LINE VALUES
LINE
DECIMAL
* E X
512
2 ' X
256
>CC
64
10
16
I S
8
8
128
en
i
i
i
i
i
i
i
Switch settings indicote
a
value
o f
512
+
256
=
768
Decimol
200 +
1W =
300
Her
or
1
2
3
4
5
6
7
Figure 2-2. Base Address Switch
Table 2-1. PC/XT/AT I/O Address Space
HEX RANGE
USAGE
HEX RANGE
USAGE
000-00F
020-02 1
040-043
060-063
060-064
070-07
1
080-O8F
OAO-OA
1
OAO-OAF
OCO-ODF
OFO-OFF
IFO-IFF
200-20F
210-21F
238-23B
23C-23F
278-2717
2BO-2BF
8237 DMA #I
8259 PIC #I
8253 Timer
8255 PPI (XT)
8742 Controller (AT)
CMOS RAM
& NMI
Mask Reg. (AT)
DMA Page Registers
8259 PIC #2 (AT)
NMI Mask Register (XTj
8237 DMA #2 (AT)
Coprocessor
H a r d
Disk (AT)
GameKontrol
Expansion Unit (XT)
Bus Mouse
AIL Bus Mouse
Parallel Printer
EGA
2CO-2CF
2DO-2DF
2EO-2E7
2E8
-
2EF
2F8-2FF
3 00- 3 O F
3 10-3 1F
320-32F
378-3717
380-38F
3AO-3AF
3BO-3BB
3BC-3BF
3CO-3CF
3DO-3DF
3E8-3EF
3FO-3F7
3F8-3FF
EGA
EGA
GPIB (AT)
Serial Port
Serial Port
Prototype Card
Prototype Card
Hard Disk
(AT)
Parallel Printer
SDLC
SDLC
MDA
Parallel Printer
EGA
CGA
Serial Port
Floppy Disk
Serial Port
The Jumper
The only b a r d jumper is
a
2-position arrangement for setting the A/D Full Scale Range. This jumper
is set and calibrated by the factory for a Full Scale Range of i3.2768 V, as shown in Figure 2-3. To
change to the k5 V Range, set the jumper accordingly and recalibrate the Board. See Chapter 9 for
calibration instructions.
RANGE
3.276v
J 2
m
5v
Figure 2-3. J2 jumper shown with factory setting.
The k3.2768 V scaling has the advantage
of
round-number bit resolution
(100,10,
or
1
uV/bit), which
facilitates scaling from the binary output of the converter. The
k5
V scaling has the advantage of
matching most commercial signal sources and transducers (1OV with 2 / 1 attenuator). Table 2-2 lists
the Full Scale/Gain ranges and their corresponding bit resolutions.
2 - 2
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