DIP Switches and Jumpers
2-4
Blackfin EZ-Extender Manual
DIP Switches and Jumpers
The following section describes the function of all of the jumpers and
switches on the EZ-Extender. Before connecting the extender, make sure
you understand each possible settings effect on your application.
Direction Control Switch (SW1)
The PPI interface is bidirectional and half-duplex. A designated DIP
switch,
SW1
, provides an independent direction control for the
DATA_A
bus
and the sync signals (
FSYNC1
and
FSYNC2
) going to the camera interface
and ADC/mixed-signal HSC interface, as illustrated in
. Each of the signals can be hardwired to be either transmit or
receive, or can be changed in real time using the
PF0
processor program-
mable flag pin.
If the
PF0
programmable flag is intended for direction control,
ensure the flag is not used for other purposes on the EZ-KIT Lite
board (the motherboard).
When the switch connects a direction control signal to ground (
GND
), the
corresponding signal (or signals) being controlled is an input.
The
SW1
DIP switch settings are summarized in
.
Table 2-1. SW1 Data Direction Control Positions 1 and 2
SW1 Position 1
SW1 Position 2
Function
OFF
OFF
EZ-KIT Lite is transmitter
ON
OFF
PF0
sets the direction:
0
= EZ-KIT Lite is receiver
1
= EZ-KIT Lite is transmitter
OFF
ON
EZ-KIT Lite is receiver
ON
ON
Do not use
