![Spectrum Digital TMS320DM642 Скачать руководство пользователя страница 13](http://html.mh-extra.com/html/spectrum-digital/tms320dm642/tms320dm642_technical-reference_1344847013.webp)
Spectrum Digital, Inc
1-3
• 8 user LEDs
• Single voltage power supply (+5V)
• Expansion connectors for daughter card use
• Dual UART with RS-232 drivers
1.2 Functional Overview of the TMS320DM642 EVM
The DSP on the DM642 EVM interfaces to on-board peripherals through the 64-bit
wide EMIF or one of the three 8/16 bit wide video ports. The SDRAM, Flash, FPGA,
and UART are each connected to one of the busses. The EMIF bus is also connected
to the daughter card expansion connectors which are used for add-in boards.
On board video encoders and decoders interface to the video ports and expansion
connectors. Two decoders and one encoder are standard on the EVM. On screen
display functions are implemented in an external FPGA which resides between the
output video port and the video decoder.
An on-board AIC23B codec allows the DSP to transmit and receive analog audio
signals. I
2
C bus is used for the codec control interface and the McASP is used for data.
Analog interface is done through three 3.5mm audio jacks that correspond to
microphone input, line input, and line output. The codec can select the microphone or
the line input as the active input. The analog output is driven to the line out (fixed gain)
connector. The McASP can be re-routed to the expansion connectors in software.
A programmable gate array called an FPGA is used to implement glue logic that ties
the board components together. The FPGA also has a register based software user
interface that lets the user configure the board by reading and writing to these registers.
The EVM includes 8 LEDs which can be used to provide the user with interactive
feedback. These LEDs are accessed by reading and writing to the FPGA registers.
An included 5V external power supply is used to power the board for stand alone
applications whereas the PC bus supplies power when used as a PCI plug in card.
On-board switching voltage regulators provide the 1.4V DSP core voltage and 3.3V I/O
supplies. The board is held in reset until these supplies are within operating
specifications. The EVM also has an LDO regulator which pr1.8 volt FPGA
core voltage, and +3.3 volt encoder and decoder supplies.
Code Composer communicates with the EVM through an external emulator via the
14 pin or 60 pin external JTAG connectors.
Содержание TMS320DM642
Страница 2: ......
Страница 10: ......
Страница 18: ...Spectrum Digital Inc 1 8 TMS320DM642 EVM Technical Reference ...
Страница 36: ...Spectrum Digital Inc 2 18 TMS320DM642 EVM Technical Reference ...
Страница 59: ...A 1 Appendix A Schematics This appendix contains the schematics for the TMS320DM642 EVM ...
Страница 86: ...Spectrum Digital Inc B 2 TMS320DM642 EVM Technical Reference THIS DRAWING IS NOT TO SCALE ...
Страница 87: ......
Страница 88: ...Printed in U S A December 2004 507345 0001 Rev B ...