Datasheet
System Architecture
2-4 Blackfin A-V EZ-Extender Manual
Table 2-1. Signals of Expansion Interface Connectors
Net/Bus Name
(Direction)
A-V EZ-Extender Function Relevant
Configuration
Jumpers
PPI0_D[0:15]
(Bi)
Connects the processor’s
PPI0 data pins to the
VID_IN_D[0:15] or the VID_OUT_D[0:15] buses,
depending on the jumper settings. This allows
PPI0 to
interface with all of the possible video interfaces on the
board. This bus can be bidirectional; the direction can be
fixed with a jumper or controlled by a flag pin.
JP5.3/4,
JP9.2/4/6
PPI0_CLK
(Output)
The clock related to the data on
PPI0. This can come
from an onboard oscillator, from one of the video inter-
faces, or from a socket that allows a user-supplied oscilla-
tor.
JP4.1/2,
JP4.3/4,
JP4.5/6,
JP4.7/8
PPI0_SYNC1
(Bi)
The frame sync signal going to the processor’s
PPI0_SYNC1 pin. The signal behaves as the HSYNC or
HREF for the video interfaces. The signal also can be used
to drive the FPDI
HS signal. The signal can be bidirec-
tional, where the direction is fixed with a jumper or is
controlled by a flag pin.
JP6.1/3/5,
JP8.1/3/5,
JP8.7/8
PPI0_SYNC2
(Bi)
The frame sync signal going to the processor’s
PPI0_SYNC2 pin. The signal behaves as the VSYNC or
VREF for the video interfaces. The signal also can be used
to drive the FPDI
VS signal. This signal can be bidirec-
tional; the direction can be fixed with a jumper or is con-
trolled by a flag pin.
JP6.2/4/6,
JP8.2/4/6,
JP8.7/8
PPI1_D[0:15]
(Bi)
Connects the processors
PPI1 data pins to the
VID_OUT_D[0:15] bus. The VID_OUT_D[0:15] bus
interfaces with the output video interfaces (FPDI and the
video encoder). The bus can be bidirectional but
intended to be an input. Changing the direction is neces-
sary only for test purposes and allows
PPI0 to loop-back
to
PPI1. D2, D3 and D10 of the bus have other function-
ality (follows).
JP5.3/4,
JP5.5/6,
JP3.9/10,
JP3.3/5/7
JP3.4/6/8
PPI1_D10
(Bi)
Multifunction net that typically functions as the
D10 pin
of
PPI1 but, with a jumper, also can connect to the PDWN
input of the OmniVision and the Kodak camera inter-
faces.
JP3.9/10,
JP5.3/4,
JP5.5/6