Datasheet

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 Figure 2-1 on
page 2-2. 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.
L
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 through
Table 2-3.
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