Digilent 410-174P - Manual (Page 16)

USB I/O Explorer Reference Manual
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Connector Descriptions and Jumper Settings
Label
Function
JA-JE &
JG Pmod connectors
These connectors are used to access many of the I/O functions of the board. Refer to
the Digilent Adept Port Summary table and the Connector Usage By Digilent Adept Port
tables for more information.
JPA-JPE &
JPG Power select jumpers for Pmod connectors JA-JE & JG
Place a shorting block in the VU position to supply input power (normally 5V) to the
Pmod connector. Place a shorting block in the 3V3 position to supply regulated power
(normally 3.3V) to the Pmod connector.
JF Analog Input/Output Connector
This connector provides access to the analog input signals for DAIO port 0 and the
analog output signals for DAIO port 2.
Pin 1 AIN0
Pin 2 AIN1
Pin 3 N/C
Pin 4 N/C
Pin 5 GND
Pin 6 VU or 3V3
Pin 7 AOUT0
Pin 8 AOUT1
Pin 9 AOUT2
Pin 10 AOUT3
Pin 11 GND
Pin 12 VU or 3V3
JPF Power select jumper for connector FJ
This jumper selects the voltage supplied to the supply pins on JF. Place a shorting
block near the board edge to select input power (normally 5V). Place the sorting block
away from the board edge to select regulated power (normally 3.3V).
J1 Analog Input/Output Connector
This connector provides access to the same signals as JF. The signal connections are
labeled on the board. All even numbered pins on the connector are connected to GND.
The voltage supplied on pin 13 (VJPF) is the voltage selected by JPF.
J2 A/D Converter Reference Input
This pin is used to supply the reference voltage for the A/D converter in the primary
microcontroller (used by DAIO port 0) when the port is operating using an external
reference. The voltage applied at this pin must not exceed the operating voltage of the
board (normally 3.3V). The reference voltage is applied to the AREF1 pin.
J3 Primary Microcontroller (AT90USB646) Debug Connector
This connector allows use of an Atmel JTAG ICE mkII or AVR Dragon to perform in-
system programming and debug of code running in the primary microcontroller. Note:
the fuses must be set to enable the JTAG interface to allow in-system debug.
J4 USB Connector
Micro B connector used to connect I/O Explorer to USB host port.
J5 A/D Converter Reference Input
This pin is used to supply the reference voltage for the A/D converter in the secondary
microcontroller (used by DAIO port 2) when the port is operating using an external
reference. The voltage applied at this pin must not exceed the operating voltage of the
board (normally 3.3V). The reference voltage is applied to the AREF2 pin.