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V
REF
S1-3 POT
Function:
Connects the potentiometer output to ADC0.
This input is buffered by an AD8606. This is
for demonstration purposes.
Use:
Slide S1-3 to the ON position to connect
the potentiometer to the op amp of the ADC0
input channel.
Slide S1-3 to the OFF position to use the
ADC0 input on the J3 header.
S1- 4 ADC3
Function:
Brings out ADC3 (Pin 64) on J3 header.
Use:
Slide S1-6 to the ON position to directly
connect ADC3 of the J3 header to the ADC3
pin (Pin 64) of the ADuC7024.
Slide S1-6 to the OFF position to discon-
nect ADC3 of the J3 header from the ADC3
pin (Pin 64) of the ADuC7024.
S1-5 VIN–
Function:
Connects –OUT of the single - ended -to-
differential op amp (AD8132) to ADC3.
S1-5 and S1-6 must be used together, when
VIN– is in the ON position; VIN+ must also
be in the ON position to use the differential
op amp on channels ADC3 and ADC4.
Use:
Slide S1-5 to the ON position to connect
–OUT of the AD8132 to ADC3.
Slide S1-5 to the OFF position to use ADC3
without the AD8132.
S1-6 VIN+
Function:
Connects +OUT of the single-ended to dif-
ferential op amp (AD8132) to ADC4. When
VIN+ is in the ON position, VIN– must also
be in the ON position to use the differential
op amp on channels ADC3 and ADC4.
Use:
Slide S1-6 to the ON position to connect
+OUT of AD8132 to ADC4.
Slide S1-6 to the OFF position to use ADC4
without the AD8132.
S1-7 ADC4
Use:
Slide S1-6 to the ON position to connect
directly ADC4 of the J3 header to the ADC4
pin (Pin 1) of the ADuC7024.
Slide S1-6 to the OFF position to discon-
nect ADC4 of the J3 header from the ADC4
pin (Pin 1) of the ADuC7024.
S1-8 LED
Function:
Connects the DAC1 output to the green LED
of the demo circuit, D1.
Use:
Slide S1-7 to the ON position to connect
the DAC1 output to D1.
Slide S1-7 to the OFF position to use the
DAC1 output on the J3 header.
REV. 0
EXTERNAL CONNECTORS
J3 Analog I/O Connector
The analog I/O connector J3 provides external con-
nections for all ADC inputs, reference inputs, and
DAC outputs. The pinout of the connector is shown
in Table II.
Table II. Pin Functions for Analog I/O Connector J3
Pin No.
Pin Description
J3-1
AV
J3-2
AGND
J3-3
V
REF
J3- 4
DAC
J3-5
ADC0
J3-6
ADC1
J3-7
ADC2
J3-8
ADC3
J3-9
ADC4
J3-10
ADC5
J3-11
ADC6
J3-12
ADC7
J3-13
ADC8
J3-14
ADC9
J3-15
V
DIFF
J3-16
V
OCM
J3-17
DAC0
J3-18
DAC1
J3-19
ADC
J3-20
AGND
J5 Power Supply Connection
J5 allows for the connection between the evalua -
tion board and the 9 V power supply provided in the
ADuC7024 development system.
J4 Emulation Connector
J4 provides a connection of the evaluation board to the
PC via a USB cable and ULINK provided in the ADuC7024
development system.
J1 Serial Interface Connector
J1 provides a simple connection of the evaluation board
to the PC via a PC serial port cable provided with the
ADuC7024 development system.
–3–
AN-719
DD
REF
NEG
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