Digilent Nanocon - Manual (Page 3)

Digilent, Inc. Nanocon Reference Manual
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converters or pulse-width modulators.
Each 6-pin connector provides four signals,
power, and ground. These connectors are
specifically designed to work with the
Digilent Pmod line of peripheral boards, but
can be used to connect to any off-board
I/O devices.
See Table 1 for more information on
connecting peripheral modules and other
devices to the Nanocon.
Table 1 shows the
connectors with their designed base
function and a map to the ATmega168 I/O
ports. All I/O port signal pins can be used
for general-purpose digital I/Os.
Power Supply Connectors
The Nanocon is rated for external power
ranging from 2.7 to 5.5 volts DC. Using
voltage outside this range could damage
the Nanocon and connected devices.
The Nanocon can be powered through any
of the board’s 6-pin Pmod headers or the
J3 connector.
Each of these connectors provides a VCC
and a ground pin. A power supply
providing between 2.7 and 5.5 volts can be
connected to the VCC pin on any one of
these connectors.
When the Nanocon is plugged into another
Digilent microcontroller or FPGA board,
that board can power the Nanocon through
the Pmod connector. The host board
should be jumpered to provide 3.3V on the
VCC pin of the Pmod connector being
used. The Nanocon will then be powered
by the host board’s power supply, and will
in turn provide power from the host board
to any peripheral boards connected to the
Nanocon’s other Pmod connectors.
For standalone applications, the Digilent
PmodREG1 is a voltage regulator module
that can be used to supply the required
operating voltage.
Device Programming
The Nanocon has one in-system-
programming connector, J1. The Digilent
programming cable is connected to J1.
Either a parallel JTAG or USB JTAG/SPI
cable can be used. When connecting the
programming cable, ensure that the VCC
and GND pin labels from the cable match
to the VCC and GND pins on the Nanocon.
A power supply must be provided to the
Nanocon when programming. The Digilent
programming cable does not supply power
to the board; the board it is plugged into
powers the programming cable. The
Digilent PmodREG1 voltage regulator
module can be used, or any appropriately
regulated power supply can be connected
to J3. If the Nanocon is being used in
conjunction with another Digilent board,
such as the Cerebot or Minicon, these
boards have connectors that can be used
to supply power to the J3 connector on the
Nanocon using a two-wire cable.
Programming can be accomplished using
the Digilent AVRP application, available by
free download from the Digilent web site. It
is also possible to configure the AVRDUDE
programmer in the WinAVR release for in-
system-programming using the Digilent
parallel JTAG cable. See the
documentation for these applications for
more information on board programming.
Connector J1 is used both for in-system-
programming and for user access to the
SPI controller. The jumper block JP1 is
used to select between the two functions.
The shorting block is placed in the RST