Datasheet

Blackfin A-V EZ-Extender Manual 2-7
A-V EZ-Extender Hardware Reference
Jumpers
Before using the Blackfin A-V EZ-Extender, follow the steps in “A-V
EZ-Extender Setup” on page 1-1.
Figure 2-2 shows the locations of all of the jumper headers. The jumper
headers are divided to show the placement and rotation of each jumper.
The jumpers are described by the pins of the header on which the jumpers
can be placed. For example,
JP3.4/6/8 refers to a single jumper that can
be placed across pins 4 and 6, or pins 6 and 8, of JP3. The dark pin indi-
cates pin
1 of each header.
Video Test Loopback Jumpers (JP1.1/2, JP1.3/4,
JP1.5/6)
For test purposes only, the video test jumpers loop-back the video
encoder’s output signals to the video decoder’s input signals. By default,
none of these jumpers is installed.
Connector Voltage Selection Jumper (JP2)
The camera module and LCD display interfaces can be powered via the
extender. The actual voltage of these interfaces, 3.3V or 5V, is determined
by the placement of the
JP2 jumper (see Table 2-2).
TWI Source Selection Jumpers (JP3.3/5/7,
JP3.4/6/8)
Due to the fact that some Blackfin processors feature a built-in two-wire
interface (TWI), while others need to emulate the interface with program-
mable flags, two jumpers are provided to plug the A-V EZ-Extender to
both sources (see Table 2-3).