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5
7. Apply the signals to control the SPI interface
at J6 or VIA5 to VIA7. See the evaluation
board schematic (
Figure 10
) or the J6 header
pin out (
Figure 5
) for more details.
3.2 Computer Mode
Refer to
Figure 1
for locations of test points and
major components.
1. Run the WV 4 program, version 4.4 or higher
is required to interface to the WV4 board.
While the program is loading, continue below.
2. Connect a USB cable between the WV4
board and the PC running the WaveVision 4
software.
3. Connect the
J6
header on the ADC122S655
evaluation board to the
J7
WV4 serial
connector on the WV4 board. Refer to
Figure
4
for the serial connection and
Figure 5
for the
J6 header pin out.
Figure 4: WV4 to ADC122S655 Connection
Figure 5: J6 (WV4S) Header Pin Out
4. Connect a clean analog (not switching) +5.0V
power source with a 300mA current limit to
power connector
J3
on the WV4 board.
Ground the GND connector and turn on the
power.
5. Connect a clean analog (not switching) +5.0V
power source with a 300mA current limit to
power connector
TP12
on the ADC board.
Ground pin
TP13
and turn on the power.
Place a shorting jumper between
pins 1 & 2
of JP11
to power the board. LED D3 should
be ON.
Note: The evaluation board can also be
powered directly from the WV4 board by
placing a shorting jumper between pins 2 & 3
and removing the external supply.
6. Place an 8 MHz crystal oscillator into the
socket at Y2 and place a shorting jumper
between
pins 1 & 2 of JP12
. Alternatively,
connect a signal generator to TP15 (CLK_IN)
and place a shorting jumper between
pins 2
& 3 of JP12
to use an external clock.
7. Place a shorting jumper across
pins 2 & 3 of
JP8
, see
table 1
for more details.
8. Perform step 4 of section 3.1 to drive the
analog inputs. For information on changing
the configuration of the analog input section,
read section 2.0 Board Assembly for details.
The board comes ready for a DC coupled
differential input signal.
9. Perform step 5 or 6 of section 3.1 to select the
reference voltage.
10. Refer to section 5.0 on Software Operation
and Settings to setup WaveVision 4.
DOUT
