Datasheet

DAC HSC Interface
1-2 Blackfin EZ-Extender Manual
To configure the Blackfin EZ-Extender to connect to an ADC or
mixed-signal HSC evaluation board, first determine the source of the PPI
clock. To learn about possible clock settings, refer to “Clock Routing
Switch (SW2)” on page 2-5. It is also necessary to determine the direction
of the data and frame synchronization signals. The direction is dependent
upon the type of the board to which you connect. With ADC boards, it is
necessary to set up the data driver on the extender as a receiver. With
mixed-signal boards, the data direction can change and a programmable
flag is used to change the direction in real time. The frame sync signals are
dependent on the external user interface; thus, the functionality of the
interface must be taken into consideration. For more information, refer to
“System Architecture” on page 2-1 and “DIP Switches and Jumpers” on
page 2-4.
Refer to the Analog Devices Web site at http://www.ana-
log.com/en/prod/0%2C2877%2CBF%25252DEXTENDER%2C00.html for more
information about the daughter card.
A list of ADC and mixed-signal evaluation boards compatible with the
extender can be found at http://www.analog.com/processors/proces-
sors/blackfin/technicalLibrary/manuals/pdf/EZ-Extender_to_DSP_Su
pported.pdf. Example programs can be found at ftp:// ftp.ana-
log.com/pub/tools/patches/bf_extender_card.zip, when available. To
learn more about Analog Devices data converters, go to
http://www.analog.com.
DAC HSC Interface
The Blackfin EZ-Extender can connect to digital-to-analog converter
HSC evaluation boards via the DAC HSC interface. The DAC HSC
interface consists of a 40-pin male header, which contains all of the con-
trol and data signals necessary to transfer data from the processor’s PPI to