82
Table 5-7 Detailed information of the indicators
Indicator Name
Description
HEX5
Inversed high byte of DATA(Key Code)
HEX4
Inversed low byte of DATA(Key Code)
HEX3
High byte of ADDRESS(Custom Code)
HEX2
Low byte of ADDRESS(Custom Code)
HEX1
High byte of DATA(Key Code)
HEX0
Low byte of DATA (Key Code)
5
5
.
.
9
9
A
A
D
D
C
C
R
R
e
e
a
a
d
d
i
i
n
n
g
g
This demonstration illustrates steps which can be used to evaluate the performance of the 8-channel
12-bit A/D Converter ADC7928. The DC 5.0V on the 2x5 header is used to drive the analog signals
and by using a trimmer potentiometer, the voltage can be adjusted within the range of 0~5.0V. The
12-bit voltage measurements are indicated on the NIOS II console.
Figure 5-19
shows the block
diagram of this demonstration.
Note that
,
the input voltage range is 0-5V
,
and if your input voltage is -2.5-2.5V
,
you can make the
pre-scale circuit to adjust their range to 0-5V.
Figure 5-19 ADC Reading Block Diagram
Summary of Contents for DE1-SOC
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