Analog Devices ADAV4622 Manual page 26

ADAV4622
LOADING A CUSTOM AUDIO PROCESSING FLOW
ADDRESS
The ADAV4622 can load a custom audio flow from an external
AUDIO
AUDIO
2
I C ROM. The boot process is initiated by a simple control
PROCESSOR
PROCESSOR
MEMORY
register write. The EEPROM device address and the EEPROM DATA
start address for the audio flow ROMs can all be programmed.
LOAD LOAD
ON ON
For the duration of the boot sequence, the ADAV4622 becomes
RESET COMMAND
2
the master on the I C bus. Transfer of the ROMs from the
EEPROM to the ADAV4622 takes a maximum of 1.06 sec,
DEFAULT
BOOT-UP
CODE
ROM
assuming that the full audio processor memory is required,
2
during which time no other devices should access the I C bus.
2
I C PORT
Once the transfer is complete, the ADAV4622 automatically
2
reverts to slave mode, and the I C bus master can resume
sending commands.
EXTERNAL
CUSTOM
BOOT-UP ROM
CODE
47260 BYTES (MAX)
Figure 33. External EEPROM Booting
Rev. B | Page 26 of 28