SPI flash programmer code

jmg

Peter Jakacki wrote: »

I'm using the original Winbond W25Q80BV at present but I'm happy to scrap the tube of them for something else if need be.

That part code already shows as obsolete at digikey, but they do mention 0xff and 0xffff reset commands.

Can you easily try sending it
0xff, 0xffff, 0x66, 0x99 (30us)
or maybe
0xff, 0xffff, 0x66, 0x99 (30us),0xff ?

to see if it tolerates the 0x66, 0x99 & exits Quad mode ok ?

jmg

Rayman wrote: »

Just found there is an ofni group standard for commands, shared by many manufacturers

One of the shared commands is reset, $ff
http://www.onfi.org/~/media/ONFI/specs/BA_NAND_rev_1_1_Gold.pdf

That seems to be NAND parallel Devices ( ALE & 8 bit bus etc), so quite different from SPI Serial Flash ?

Peter Jakacki

jmg wrote: »

Peter Jakacki wrote: »

I'm using the original Winbond W25Q80BV at present but I'm happy to scrap the tube of them for something else if need be.

That part code already shows as obsolete at digikey, but they do mention 0xff and 0xffff reset commands.

Can you easily try sending it
0xff, 0xffff, 0x66, 0x99 (30us)
or maybe
0xff, 0xffff, 0x66, 0x99 (30us),0xff ?

to see if it tolerates the 0x66, 0x99 & exits Quad mode ok ?

Not quite true, only some variants as is normal for this type of product, however there are plenty of W25Qxxx type chips right up to 128Mbit, all using the same standard (AFAIK, and will check).

There doesn't seem to be any problems with issuing those sequences:

TF2# $FF SFINS $FF SFINS $FF SFWR $66 SFINS $99 SFINS SFEND  ok
TF2# 0 $40 SF DUMP
00.0000: A4 1F EC FC A4 1D EC FC A4 1B EC FC A4 19 EC FC    ................
00.0010: A4 17 EC FC A4 15 EC FC A4 13 EC FC A4 11 EC FC    ................
00.0020: A4 0F EC FC A4 0D EC FC A4 0B EC FC A4 09 EC FC    ................
00.0030: A4 07 EC FC A4 05 EC FC 40 02 EC FC A4 01 EC FC    ........@....... ok
TF2#

jmg

Peter Jakacki wrote: »

jmg wrote:

Can you easily try sending it
0xff, 0xffff, 0x66, 0x99 (30us)
or maybe
0xff, 0xffff, 0x66, 0x99 (30us),0xff ?

to see if it tolerates the 0x66, 0x99 & exits Quad mode ok ?

...

There doesn't seem to be any problems with issuing those sequences:

Great, maybe Chip can place those (0xff, 0xffff, 0x66, 0x99 (30us) ) into the ROM, and many Flash parts can be checked for Boot from POR and Boot from WDR / Soft Reset ?