Hello,
> but then i need to ensure that the EE_CS for the eeprom and the additional
> DIO chip select for my DAC are time multiplexed as they select the respect
> ics...
> for this i would need to continuously monitor the EE_CS and select my DAC
> using DIO accordingly..
> now how do to do it..
> i even don't know what does the EEPROM do and when is it active...
> please tell me the functionality of the EEPROM and how to take care of DIO
> and EE_CS
One can't execute code out of NAND flash so the bootrom is loaded into the
EEPPROM. The CPU loads the EEPROM into the on-CPU MAC FIFO SRAM and executes
from there... That code then understands how to get the rest of the board up
from the NAND flash. We also store the ADC calibration values in the EEPROM.
So the only time the EEPROM is accessed is at boot time or when a user wants
to retrieve a calibration value for the ADC.
//Eddie
> Eddie Dawydiuk <> wrote:
> Hello,
>
>> the additional device that i am connecting also has a low chip select like
>> the EEPROM on the board.
>>
>> so how should i take care of it
>> also there is no SPI chip select signal, so what chip signal are u talking
>> about..
>> the EEPROM uses EE_CS...
>
> Use a DIO pin as your chip select...
>
> //Eddie
>
>
>
>> Eddie Dawydiuk <> wrote: Hello,
>>
>>> The EEPROM is connected to the processor through the SPI interface..
>>> The same SPI is also available at the DIO port�
>>> How do I ensure that if I connect a device at the SPI interface at the DIO
>>> port, it doen�t affect the functioning of EEPROM..
>>
>> That is what the chip select is for, assert the chip select for the device
>> you
>> want to communicate with before transfering data to it. Then deassert the
>> chip select when you have transfered the data...
>>
>> //Eddie
>>
>>
>>
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