Spectrum Digital TMS320C6424, Техническая документация

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Spectrum Digital, Inc
2-7
2.5.2 I
2
C EEPROM
The C6424 EVM incorporates an I
2
C eeprom that can be used for booting or general
purpose storage.
This eeprom is also used to store the ethernet MAC address and the board’s revision.
The MAC address is also labeled on the board. Care should be taken not to erase
these items when user information is stored in the eeprom. Spectrum Digital uses
addresses 0x7F00 to 0x7FFF for manufacturing information. This information is
shown in the table below.
2.6 S/PDIF Analog, and Optical Interfaces
The McBSP’s FSR pin on the C6424 can be configured to operate as a S/PDIF
transmitter. The C6424 EVM supports both analog and optical interfaces. The
analog S/PDIF output pin is routed to a driver and filter circuit before being output on
J10. I
2
C Expander U64 output P2 is used to enable the S/PDIF interface. When
S/PDIF is selected on the expander (P2=0), the McASP enable should be disabled and
the McBSP enable should be disabled.Another driver is used to interface the optical
transmitter P14. When the S/PDIF interface is enabled the TLV320AIC33 codec is
disabled, the WCLK should be disabled prior to enabling the S/PDIF output.
The McBSP interface can be disabled for daughter card use by pulling the
AIC_ENABLEn signal high from the daughter card connector.
Table 6: C6424 MAC Addresses
Address Contents
0x7F00 EMAC Address 0
(most significant)
0x7F01 EMAC Address 1
0x7F02 EMAC Address 2
0x7F03 EMAC Address 3
0x7F04 EMAC Address 4
0x7F05 EMAC Address 5
0x7F06 Reserved
0x7F07 Board Revision