hilscher NXHX 90-JTAG, Описание устройства

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2.4.5 X700 – ADC pin header
Pin header X700 for using the internal ADC (analogue to digital converter)
of the netX. For identifying the connector on the board, see position (8) in
section Positions of interfaces and operating elements [
}
page 12].
Note:
To enable this interface, put switch 4 of S701 into OFF position (see
position (6) in section Positions of interfaces and operating
elements [
}
page 12]).
You can use jumpers or bridges to monitor on-board operating voltages or
connect analog input signals for measurements.
Note that the selection of the ADC reference voltage (internal or external) is
programmable by register, and can be optionally provided by the internal
reference buffer, which is 2.6 V or 3.3 V. Therefore, the analog inputs
referring to
VDDIO_AD
and
3V3_AD
are equipped with a voltage divider for
2.4 V (see schematic diagram IO/ADC [
}
page 58]).
For rail-to-rail operations up to 3.3 V, the external reference voltage
VREF_ADC
must be supplied at X300 . For identifying the X300 via
connector on the board, see position (23) in section Positions of interfaces
and operating elements [
}
page 12].
Device destruction by exceeding the allowed reference voltage
The reference voltage must not exceed 3.3 V; otherwise the netX 90 will be
damaged!
X700 Pin Signal
1
MMIO04/ADC0-0
2
VDDIO_AD
3
MMIO05/ADC0-1
4
3V3_AD
5
MMIO06/ADC1-0
6
+1V2
7
MMIO07/ADC1-1
8
+1V2
9
GND
10
GND
Table 19: Pin assignments X700
NXHX 90-JTAG | Device description
DOC170202HW03EN | Revision 3 | English | 2019-01 | Released | Public © Hilscher 2019