Functional Overview - Spectrum Digital TMS320VC5509A EVM PLUS Technical Reference

• 128 x 64 display and position keypad
• Standard expansion connectors for daughter card use
• National Instruments interface
• JTAG emulation through on-board JTAG emulator with USB host
interface or external emulator
• MMC card interface
• Single voltage power supply (+5V)
1.2 Functional Overview of the TMS320VC5509A EVM PLUS
The DSP interfaces to external SDRAM, Flash memory and an expansion memory
interface connector through its 16-bit External Memory Interface (EMIF). The SDRAM
accesses are in 16-bit mode in chip enable 0 memory space. The EMIF provides the
necessary refresh signals. The Flash accesses are in 16-bit asynchronous mode in the
bottom half of chip enable 1 space. The EMIF signals are brought out to the
daughter card expansion connectors which use chip enables 2 and 3.
An on-board AIC23B codec allows the DSP to transmit and receive analog signals.
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I C is used for the codec control interface and McBSP0 is used for data. Analog
I/O is done through four 3.5mm audio jacks that correspond to 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.
McBSP2 interfaces to a MultiMedia card. This allows the DSP a way to store off data
for video and audio applications. McBSP1 and McBSP2 are routed to the expansion
connectors via software configuration registers in the CPLD
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 the CPLD registers. The
registers reside in the upper half of chip enable 1.
The EVM PLUS includes 4 LEDs and 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. A wake-up push button allows the DSP to be interrupted, to "wake up"
the DSP when it is in sleep or idle mode.
An included 5V external power supply is used to power the board. On-board voltage
regulators provide the 1.6V to 1.2V DSP core voltage, 3.3V digital and 3.3V analog
voltages. A voltage supervisor monitors the internally generated voltage, and will hold
the board in reset until the supplies are within operating specifications and the reset
button is released.
Spectrum Digital, Inc
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