Analog Devices Blackfin A-V EZ-Extender, Руководство пользователя

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Analog Video Interface
1-4 Blackfin A-V EZ-Extender Manual
Analog Video Interface
The Blackfin A-V EZ-Extender supports video input and output applica-
tions with an on-board video encoder and decoder. The ADV7179 video
encoder provides up to three output channels of analog video, while the
ADV7183B video decoder provides up to three input channels of analog
video. Both the encoder and decoder connect to
PPI0
of the expansion
interface, while the encoder also can connect to
PPI1
(if the processor has
two PPI ports). For a general overview of the analog video interface con-
nectors, see
Figure 2-1 on page 2-3 ; for details, see “AV_RESET Source
Jumper (JP9.1/3/5)” on page 2-14 .
To use ADV7179 and ADV7183B, set up all of the jumpers related to the
PPI data signals, frame sync signals, and clock signal. To program the
internal register of video devices, configure the 2-wire interface signals (see
“TWI Source Selection Jumpers (JP3.3/5/7, JP3.4/6/8)” on page 2-8 ).
Finally, determine the source of encoder or decoder reset, as described in
“AV_RESET Source Jumper (JP9.1/3/5)” on page 2-14 .
Before using the interface, follow the procedure in “A-V EZ-Extender
Setup” on page 1-2 .
For more information about ADV7179 and ADV7183B, go to
www.analog.com/ADV7179
and
www.analog.com/ADV7183B
.
Camera Module Interfaces
The Blackfin A-V EZ-Extender has three right-angle connectors (
J4
,
J6
,
and
P4
) with control signals necessary to interface with three camera eval-
uation modules from different manufactures. For a general overview of the
camera interface connections, see
Figure 2-1 on page 2-3 ; for details, see
“A-V EZ-Extender Schematic” on page B-1 . Figure 1-1 shows the orienta-
tion of the camera modules as each camera connects to the board.