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Spectrum Digital, Inc
? Single voltage power supply (+5V)
? Expansion connectors for daughter card use
? VLYNQ Interface
? S/PDIF Interface, analog, and optical
1.2 Functional Overview of the DM6437 EVM
CAN
RS-232
DAC
1 2 3 4
DIP
RST
POR
ENET
RJ45
Ext JTAG
UART/CAN Switches
Out
LEDs
ENET
Embedded
MIC IN
PHY
JTAG Emulator
DAC B
DAC C
UARTs
AIC33
Codec
LINE IN
LINE OUT
DAC D
EMIF
NOR
Flash
32
MII
JTAG
HP Out
SVHS
OUT
SVHS
IN
Video IN
AEM2
AEM1
AEM0
AEAW2
Video
Decoder
BM0
BM1
BM2
BM3
FASTB
DM6437
Video Port
PCI
I 2 C Bus
McBSP0 SPI ROM
VLNQ
Mini PCI
McBSP1 or McASP0
1.8V Supply
1.2V Core Supply
3.3V I/O Supply
S/PDIF
(optical)
S/PDIF
PCI Connector
Figure 1-2, Block Diagram DM6437 EVM
The DM6437 on the EVM interfaces to on-board peripherals through integrated device
interfaces and a 8-bit wide EMIF bus. The DDR2 memory is connected to its own
dedicated 32 bit wide bus. The EMIF bus is jumper selectable to be connected to the
Flash, SRAM, NAND, and daughter card expansion connectors which are used for
add-on boards.
On board video decoder and on chip encoders interface video streams to the DM6437
processor. One TVP5146M2 decoder and 4 on chip DAC channels are standard on the
EVM (only 3 output connectors are populated so that the board can fit in a PCI slot).
On screen display functions are implemented in software on the DM6437 processor.
An on-board AIC33 codec allows the DSP to transmit and receive analog audio
signals. The I 2 C bus is used for the codec control interface, while the McBSP controls
the audio stream. Signal interfacing is done through 3.5mm audio jacks that correspond
to microphone input, line input, line output, and headphone outputs.
The EVM includes 4 user LEDs, and 4 position user DIP switch which can be used to
provide the user with interactive feedback. These interfaces are implemented via
I 2 C expanders.
1-3
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