[Solved] Equalizer Without External Memory?

[bayviewboom]

The EQ doc shows that in standalone mode, eq settings are stored on external SPI memory, and loaded into the 1053 on boot.

However, the VS1053 datasheet states that it contains it's own internal storage. Is it possible to PERMANENTLY store eq settings in the 1053, which persists after powerdown, so that no external memory is required on boot?

thx

[bayviewboom]

i THINK this is the answer:

"New for v1.20: SPI EEPROM image provided to make it possible to create a stand-alone system with preset values."
VS1053b / VS1063a Equalizer
http://www.vlsi.fi/en/support/software/ ... tions.html

So i think the answer is YES.
Correct?

[Hannu]

The VS1053 doesn't have internal flash. However with external SPI flash the values can be stored so that those survive the power loss. See figure 3 of http://www.vlsi.fi/fileadmin/software/V ... alizer.pdf The values can be programmed to the SPI image file as shown on the document.

Internally VS1053 has X,Y and instruction ROMs and RAMs. ROM is really Read-Only but it is same from one boot to another and power is required to keep RAM contents valid.

[bayviewboom]

Internally VS1053 has X,Y and instruction ROMs and RAMs. ROM is really Read-Only but it is same from one boot to another

Doesn't it also have EEPROM? Please see this:

"EEPROM image provided to make it possible to create a stand-alone system with preset values."
http://www.vlsi.fi/en/support/software/ ... tions.html

Sounds like that will not need external SPI memory, right?

See figure 3 of http://www.vlsi.fi/fileadmin/software/V ... alizer.pdf The values can be programmed to the SPI image file

Yep, i mentioned that in my first sentence in my OP: "eq settings are stored on external SPI memory"

power is required to keep RAM contents valid.

Yep, i know how RAM works.

thx!

[pasi]

"Standalone" means you don't need a microcontroller.

[Hannu]

Only VS1005G-F-Q and VS1205G-F-Q have internal flash/eeprom. None of VS10xx chips have any internal eeprom/flash.

The VS10xx applications web page has been updated to "external SPI EEPROM image"
Thank you for pointing out fuzzy wording.

[bayviewboom]

ok, thx for this info.

Can an SD card act as the external SPI memory?

[pasi]

Can an SD card act as the external SPI memory?

VS10xx cannot boot from SD. You need SPI EEPROM or SPI FLASH.

(VS1010 can boot from SD.)