Digilent 210-190P User Manual

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Revision: January 5, 2011

Overview

The Digilent Vmod Module Interface Board
(VmodMIB) is a simple solution for interfacing
additional peripheral modules and HDMI
devices to VHDCI-equipped Digilent system
boards.

Features include:

• VHDCI peripheral board connector

• Four HDMI and five 12-pin Pmod™

connectors

Functional Description

The VmodMIB is an expansion board that
connects to the VHDCI connector on Digilent
system boards and provides additional Pmod
and HDMI connections.

Power Connections

The VmodMIB provides two power busses and
a ground bus. The two power busses are
labeled VCC and VU. These two busses are
made available at each connector position on
the board. There is also a ground plane that
connects the ground pins from all connectors.

The usual Digilent convention is to power the
VCC bus at 3.3V and the VCCFX2 bus at 5.0V.
However, depending on the system board
connected and the power supply used, other
voltages may be present. Use caution when
using any voltage other than 3.3V on the VCC
bus. Most Digilent system boards will be
damaged if the voltage on the VCC bus is
greater than 3.3V.

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68 Pin, VHDCI Connector

VHDCI connector J1 is provided on one side of
the board for connection to Digilent system
boards, like the Genesys™ and Atlys™, which
contain a VHDCI-style connector. The Digilent
VHDCI connector signal convention provides
for 40 general-purpose I/O signals.

The 40 general-purpose I/O signals from the
VHDCI connector are brought out to the Pmod
and HDMI connectors. See Table 1 for a
description of the relationship between the
VHDCI connector pins and the signal names,
Table 2 for the relationship between signal
names and Pmod pins and Table 3 for the
relationship between signal names and HDMI
pins.

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VmodMIB Reference Manual

Pmod Connectors

Digilent Pmods provide various peripheral
functions. These can be as simple as buttons
or switches for inputs and LEDs for outputs, or
as complex as graphical LCD display panels,
accelerometers, and keypads.

All Digilent Pmods use either a 6-wire interface
or a 12-wire interface. The 6-wire interface
provides four I/O signals, power, and ground.
The twelve-wire interface provides 8 I/O
signals, two powers, and two grounds. The
signal definitions for the I/O signals as well as
the voltage requirements for the power supply
depend on the specific module.

The VmodMIB provides five 12-pin Pmod
connectors.

HDMI Connectors

The VmodMIB also provides four HDMI type-D
connectors to allow audio/video connections to
the system board. They use 19 pins and the
relationship between these pins and the signal
names from the VHDCI connector are
described in table 3. Each HDMI connector
has a jumper which can be used to select a 5V
source when shorted.

Also, data can be sent to the HDMI connectors
via an I2C bus from signals JE1/SDA and
JE2/SCL when the jumpers at J2 are shorted.

Keep in mind that all HDMI ports share signals
with Pmod ports. JA is shares signals with
JAA, JB with JBB, JC with JCC, JD with JDD.
All HDMI ports share pins with Pmod port JE,
which contains the I2C bus signals.

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Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.