System Architecture
2-2
Blackfin A-V EZ-Extender Manual
System Architecture
A block diagram of the Blackfin A-V EZ-Extender is shown in
.
Not shown in the diagram is the analog audio interface, which is a simple
connection between the serial port of the processor and AD1836A audio
codec. The audio interface connects directly to
SPORT0
of the expansion
interface.
In
, unidirectional buffers are show as triangle symbols, while
bidirectional buffers are shown as two overlapping triangles. For both
types of buffers, an output-enable signal comes out of the top and is active
LOW
. For bidirectional buffers, a second signal for the direction is shown.
When this net is pulled
HIGH
, the buffer is driving in the direction of the
arrow in the center; when
LOW
, the buffer is driving in the opposite
direction.
Before applying power to the system, follow the procedure in
EZ-Extender Setup” on page 1-2
.
The video interface can be split into two main signal sets:
VID_IN
and
VID_OUT
. Both signal sets consist of a 16-bit data bus, two frame sync sig-
nals, and a data clock.
VID_IN
connects to the video decoder and all
camera interfaces.
VID_IN
connects only to the
PPI0
of the EZ-KIT Lite.
VID_OUT
connects to the video encoder and flat panel display interface. On
the expansion interface,
VID_OUT
connects to either
PPI0
or
PPI1
of the
EZ-KIT Lite.
Содержание Blackfin A-V EZ-Extender
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