Digilent VDEC1 User manual
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www.digilentinc.com
Revision: 4/12/05 246 East Main | Pullman, WA 99163
(509) 334 6306 Voice and Fax
Copyright Digilent, Inc. 2 pages Doc: 502-046
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Analog
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ADV7183B
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VEDC1 Circuit Diagram
Overview
The Video Decoder 1 board (VDEC1),
centered on the ADV7183B Video Decoder
chip from Analog Devices, can digitize NTSC,
PAL, and SECAM video signals. The
ADV7183B automatically detects standard
analog baseband television signals, and
digitizes them with three 54MHz 10-bit ADCs.
Output data can be sent to an attached system
board in 8-bit or 16-bit YCrCb 4:2:2 format.
Features include:
•component, composite, and S-video
inputs;
•I
2C®compatible control bus;
•high-speed Hirose FX2 data connector
•supports NTSC, PAL, and SECAM
inputs
•8-bit or 16-bit YCrCb 4:2:2 outputs plus
HS, VS and Field signals
•programmable controls include peak
white, hue, brightness, saturation and
contrast.
Functional Description
The VDEC1 board is essentially a “carrier” for
Analog Devices’ ADV7183B Video Decoder
chip. It contains all required support circuitry,
including well-filtered and stable power
supplies, properly terminated75-ohm inputs, a
stable 27-MHz clock source, various video
input connectors, and input protection
networks. Refer to the Analog Devices data
sheet for more information about the
ADV7138B.
The VDEC1 can be used with any Digilent
board that uses the Hirose FX2 connector.
Catalog entries in the Digilent products
webpage contain a “connector” field that
clearly shows which boards have the Hirose
connector.
Operation
In operation, the VDEC1 should not be
attached to a system board until the signals
driving the Hirose connector from the system
board have been properly defined. If the
Digilent, Inc.
VDEC1 Reference Manual www.digilentinc.com
Copyright Digilent, Inc. Page 2/2 Doc: 502-046
VDEC1 board is attached to a system board,
and the system board is driving as outputs the
same signals the VDEC1 is driving, damage to
the VDEC1 and system board will result.
Before attaching the VDEC1 to a system
board, ensure that any power-on auto-
loaded configuration drives the Hirose pins
correctly. Otherwise, ensure the system
board powers on in a reset mode, not
driving the Hirose pins as outputs.
Once the VDEC1 board is attached to a
system board, the ADV7183B chip must be
programmed (via its I2C®compatible port) for a
specific operating mode before output video
data is available. Please refer to the
ADV7138B data sheet for information on
programming various operation modes.
After an operating mode has been selected, a
video source can be attached to the
appropriate video input connector, and output
digital video data will be available.
Hirose Connector Pinout
The VDEC1 contains a 100-pin Hirose FX2
socket connector that mates with a
corresponding Hirose plug connector on a
system board. Pin1 of the socket connector
attaches to pin1 of the plug connector. Thus, to
generate a pin connection list for a given
system board, the signal definitions in the
following table can be directly mapped to the
signal definitions on the system board (e.g.,
the signal name on VDEC1 pin5 maps directly
to the signal on the system board pin5).
A Pin # Signal B Pin # Signal
1 VCC33 1 Shield
2 VCC33 2 GND
3 NC 3 NC
4 NC 4 NC
5 NC 5 GND
6 RESET 6 GND
7 SDA 7 GND
8 SCLK 8 GND
9 P15 9 GND
10 P14 10 GND
11 P13 11 GND
12 P12 12 GND
13 OE 13
GND
14 FIELD 14 GND
15 VS 15
GND
16 HS 16
GND
17 P11 17 GND
18 P10 18 GND
19 P9 19
GND
20 P8 20
GND
21 INTRQ 21 GND
22 SFL 22 GND
23 P7 23
GND
24 P6 24
GND
25 P5 25
GND
26 P4 26
GND
27 P3 27
GND
28 P2 28
GND
29 LLC2 29 GND
30 P1 30
GND
31 P0 31
GND
32 PWRDN 32 GND
33 NC 33
GND
34 NC 34 GND
35 NC 35 GND
36 NC 36 GND
37 NC 37 GND
38 NC 38 GND
39 NC 39 GND
40 NC 40 GND
41 NC 41 GND
42 NC 42 GND
43 NC 43 GND
44 NC 44 GND
45 NC 45 GND
46 GND 46 GND
47 NC 47
GND
48 GND 48 NC
49 VCC5 49 VCC5
50 VCC5 50 Shield
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