External Connectors - Analog Devices ADuC7026 Reference Manual

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 channel 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 differ-
ential 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
channel 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 J3 header to ADC4 pin
(Pin 1) of the ADuC7026.
Slide S1-6 to the off position to disconnect
ADC4 of J3 header from ADC4 pin (Pin 1) of
the ADuC7026.
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 DAC1
output on J3 header.

EXTERNAL CONNECTORS

J3 Analog I/O Connector
The analog I/O connector J3 provides external connections
for all ADC inputs, reference inputs, and DAC outputs. The
pinout of the connector is shown in Table 2.
REV. 0
Table 2. Pin Functions for Analog I/O Connector J3
Pin Number 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 ADC10
J3-16 ADC11
J3-17 V
DIFF
J3-18 V
OCM
J3-19 DAC0
J3-20 DAC1
J3-21 DAC2
J3-22 DAC3
J3-23 ADC
J3-24 AGND
J5 Power Supply Connections
J5 allows for the connection between the evaluation board
and the 9 V power supply provided in the ADuC7026
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 ADuC7026
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
ADuC7026 Development System.
J2 Digital I/O Connector
The digital I/O connector J2 provides external connec-
tions for all GPIOs. The pinout of the connector is shown
in Table 3, with details of the pin functions.
–3–
AN-744
DD
REF
NEG