Digilent VDEC1 User Manual
Digilent Hardware
D
D
i
i
g
g
i
i
l
l
e
e
n
n
t
t
V
V
i
i
d
d
e
e
o
o
D
D
e
e
c
c
o
o
d
d
e
e
r
r
B
B
o
o
a
a
r
r
d
d
(
(
V
V
D
D
E
E
C
C
1
1
)
)
R
R
e
e
f
f
e
e
r
r
e
e
n
n
c
c
e
e
M
M
a
a
n
n
u
u
a
a
l
l
TM
w w w . d i g i l e n t i n c . c o m
Revision: 4/12/05
246 East Main | Pullman, WA 99163
(509) 334 6306 Voice and Fax
Copyright Digilent, Inc.
2 pages
Doc: 502-046
Yel
Blu
Red
Grn
S
Video
.1uF
75
.1uF
75
.1uF
75
.1uF
75
.1uF
75
16
Data
Analog
Devices
ADV7183B
HS
VS
Field
LLC1
LLC2
OE
INTRQ
SFL
2
uWIRE/
I2C
CVBS
Y
PR
PB
SV_Y
SV_C
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
2
C
®
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