Spectrum Digital TMS320C6416 DSK, Technical Reference

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Spectrum Digital, Inc
2-8 TMS320C6416 DSK Module Technical Reference
2.6 Daughter Card Interface
The DSK provides three expansion connectors that can be used to accept plug-in
daughter cards. The daughter card allows users to build on their DSK platform to
extend its capabilities and provide customer and application specific I/O. The
expansion connectors are for memory, peripherals, and the Host Port Interface (HPI)
The memory connector provides access to the DSP’s asynchronous EMIF signals to
interface with memories and memory mapped devices. It supports byte addressing on
32 bit boundries. The peripheral connector brings out the DSP’s peripheral signals like
McBSPs, timers, and clocks. Both connectors provide power and ground to the
daughter card
The HPI is a high speed interface that can be used to allow multiple DSPs to
communicate and cooperate on a given task. The HPI connector brings out the HPI
specific control signals as well as McBSP2.
Most of the expansion connector signals are buffered so that the daughter card cannot
directly influence the operation of the DSK board. The use of TI low voltage, 5V tolerant
buffers, and CBT interface devices allows the use of 5V or +3.3V devices to be
used on the daughter card.
Other than the buffering, most daughter card signals are not modified on the board.
However, a few daughter card specific control signals like DC_RESET and
DC_DET exist and are accessible through the CPLD DC_REG register. The DSK
also multiplexes the McBSP1 and McBSP2 of on-board or external use. This function
is controlled through the CPLD MISC register.