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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.
1300 NE Henley Court, Suite 3
Pullman, WA 99163
(509) 334 6306 Voice | (509) 334 6300 Fax
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.
Doc: 502-190 page 1 of 5
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
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.
www.digilentinc.com page 2 of 5
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
VmodMIB Reference Manual
J1
Table 1: VHDCI Signals and Connector Pinout
1 JC-CLK_P 35 JC-CLK_N
2 GND 36 GND
3 JC-D0_P 37 JC-D0_N
4 JC-D1_P 38 JC-D1_N
5 GND 39 GND
6 JC-D2_P 40 JC-D2_N
7 JA-D0_P 41 JA-D0_N
8 GND 42 GND
9 JA-D1_P 43 JA-D1_N
10 JA-D2_P 44 JA-D2_N
11 GND 45 GND
12 JB-D0_P 46 JB-D0_N
13 JB-D1_P 47 JB-D1_N
14 GND 48 GND
15 JA-CLK_P 49 JA-CLK_N
16 VCCB 50 VCCB
17 VCC5V0 51 VCC5V0
18 VCC5V0 52 VCC5V0
19 VCCB 53 VCCB
20 JB-CLK_P 54 JB-CLK_N
21 GND 55 GND
22 JB-D2_P 56 JB-D2_N
23 JE8 57 JE7
24 GND 58 GND
25 JE2/SCL 59 JE1/SDA
26 JE10 60 JE9
27 GND 61 GND
28 JE4 62 JE3
29 JD-CLK_P 63 JD-CLK_N
30 GND 64 GND
31 JD-D0_P 65 JD-D0_N
32 JD-D1_P 66 JD-D1_N
33 GND 67 GND
34 JD-D2_P 68 JD-D2_N
S1 SHIELD S2 SHIELD
www.digilentinc.com page 3 of 5
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
VmodMIB Reference Manual
Pin Pinout
Pin Pinout
Pin Pinout
Pin Pi
nout
Pin Pinout
Pin Pinout
Pin Pinout
Pin Pinout
Pin Pinout
Pin Pinout
Table 2: Pmod Connector Pin Layouts
JA Top Set of Pins
1 JA-D0_N
2 JA-D0_P
3 JA-D2_N
4 JA-D2_P
5 GND
6 VCCB
JB Top Set of Pins
1 JB-D0_N
2 JB-D0_P
3 JB-D2_N
4 JB-D2_P
5 GND
6 VCCB
JC Top Set of Pins
JA Bottom Set of Pins
7 JA-CLK_N
8 JA-CLK_P
9 JA-D1_N
10 JA-D1_P
11 GND
12 VCCB
JB Bottom Set of Pins
7 JB-CLK_N
8 JB-CLK_P
9 JB-D1_N
10 JB-D1_P
11 GND
12 VCCB
JC Bottom Set of Pins
1 JC-D0_N
2 JC-D0_P
3 JC-D2_N
4 JC-D2_P
5 GND
6 VCCB
JD Top Set of Pins
1 JD-D0_N
2 JD-D0_P
3 JD-D2_N
4 JD-D2_P
5 GND
6 VCCB
JE Top Set of Pins
1 JE1/SDA
2 JE2/SCL
3 JE3
4 JE4
5 GND
6 VCCB
NOTE: All signals are connected via a 50 ohm resistor with
the exception of the VCCB and GND signals.
7 JC-CLK_N
8 JC-CLK_P
9 JC-D1_N
10 JC-D1_P
11 GND
12 VCCB
JD Bottom Set of Pins
7 JD-CLK_N
8 JD-CLK_P
9 JD-D1_N
10 JD-D1_P
11 GND
12 VCCB
JE Bottom Set of Pins
1 JE7
2 JE8
3 JE9
4 JE10
5 GND
6 VCCB
www.digilentinc.com page 4 of 5
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
VmodMIB Reference Manual
Pin Pinout
Pin Pinout
Pin Pinout
Pin Pinout
Table 3: HDMI Connector Pin Layouts
JAA
1 VCC5V0
2 VCCB
3 JA-D2_P
4 GND
5 JA-D2_N
6 JA-D1_P
7 GND
8 JA-D1_N
9 JA-D0_P
10 GND
11 JA-D0_N
12 JA-CLK_P
13 GND
14 JA-CLK_N
15 VCCB
16 GND
17 JE2/SCL
18 JE1/SDA
19 VCC5V0
JBB
JCC
1 VCC5V0
2 VCCB
3 JC-D2_P
4 GND
5 JC-D2_N
6 JC-D1_P
7 GND
8 JC-D1_N
9 JC-D0_P
10 GND
11 JC-D0_N
12 JC-CLK_P
13 GND
14 JC-CLK_N
15 VCCB
16 GND
17 JE2/SCL
18 JE1/SDA
19 VCC5V0
JDD
1 VCC5V0
2 VCCB
3 JB-D2_P
4 GND
5 JB-D2_N
6 JB-D1_P
7 GND
8 JB-D1_N
9 JB-D0_P
10 GND
11 JB-D0_N
12 JB-CLK_P
13 GND
14 JB-CLK_N
15 VCCB
16 GND
17 JE2/SCL
18 JE1/SDA
19 VCC5V0
NOTE: All signals are connected via a 50 ohm
resistor
1 VCC5V0
2 VCCB
3 JD-D2_P
4 GND
5 JD-D2_N
6 JD-D1_P
7 GND
8 JD-D1_N
9 JD-D0_P
10 GND
11 JD-D0_N
12 JD-CLK_P
13 GND
14 JD-CLK_N
15 VCCB
16 GND
17 JE2/SCL
18 JE1/SDA
19 VCC5V0
www.digilentinc.com page 5 of 5
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
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