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Spectrum Digital, Inc
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1.2 Functional Overview of the TMS320C6713 DSK
The DSP on the 6713 DSK interfaces to on-board peripherals through a 32-bit wide
EMIF (External Memory InterFace). The SDRAM, Flash and CPLD are all connected
to the bus. EMIF signals are also connected daughter card expansion connectors
which are used for third party add-in boards.
The DSP interfaces to analog audio signals through an on-board AIC23 codec and four
3.5 mm audio jacks (microphone input, line input, line output, and headphone output).
The codec can select the microphone or the line input as the active input. The analog
output is driven to both the line out (fixed gain) and headphone (adjustable gain)
connectors. McBSP0 is used to send commands to the codec control interface while
McBSP1 is used for digital audio data. McBSP0 and McBSP1 can be re-routed to the
expansion connectors in software.
A programmable logic device called a CPLD is used to implement glue logic that ties
the board components together. The CPLD has a register based user interface that
lets the user configure the board by reading and writing to its registers.
The DSK includes 4 LEDs and a 4 position DIP switch as a simple way to provide the
user with interactive feedback. Both are accessed by reading and writing to the CPLD
registers.
An included 5V external power supply is used to power the board. On-board switching
voltage regulators provide the +1.26V DSP core voltage and +3.3V I/O supplies. The
board is held in reset until these supplies are within operating specifications.
Code Composer communicates with the DSK through an embedded JTAG emulator
with a USB host interface. The DSK can also be used with an external emulator
through the external JTAG connector.
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