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Author Topic: Can I replace the 1 Mb flash by a 4 Mb or a 8 Mb ?  (Read 2594 times)

dualvsta

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Can I replace the 1 Mb flash by a 4 Mb or a 8 Mb ?
« on: February 06, 2013, 10:28:11 AM »
Hello !

On the PIC-WEV board rev C, we have an Atmel AT45DB01.
But if we need more than 1Mb is it possible to replace with a 4 or 8 Mb like an AT45DB08 ?

Something need to be change in the hardware configuration ?

Thank you for your help :)

LubOlimex

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Re: Can I replace the 1 Mb flash by a 4 Mb or a 8 Mb ?
« Reply #1 on: February 06, 2013, 01:00:09 PM »
Hey Dualvsta,

Quote
On the PIC-WEV board rev C, we have an Atmel AT45DB01. But if we need more than 1Mb is it possible to replace with a 4 or 8 Mb like an AT45DB08 ? Something need to be change in the hardware configuration ?

You can replace the memory as long as it is pin-to-pin compatible. That means it has to be with the same number of pins and connected the same way. For instance if pin 1 (SDO on the AT45DB011) is... let say SCK on the new memory of course it won't work. Unless you edit "HWP OLIMEX_PIC-WEB.h" the "EEPROM" section (which as I already said is actually flash) and configure the pins and SPI peripheral.

You can't use AT45DB08 since it has more pins than AT45DB01.

Regards,
Stanimir/OLIMEX
Lub/OLIMEX
Technical support and documentation manager at Olimex

dualvsta

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Re: Can I replace the 1 Mb flash by a 4 Mb or a 8 Mb ?
« Reply #2 on: February 06, 2013, 04:10:18 PM »
Hi,

Thank you for your explanations.
I obviously checked that the component was pin compatible and it is as you can see on the datasheet :
http://www.farnell.com/datasheets/97337.pdf

I wanted to know if the amount of additional memory will be taken into account by the TCPIP stack or if there was something to set for that.

Thank you again :)