> -----Original Message----- > From: Jagan Teki [mailto:[email protected]] > Sent: Wednesday, June 07, 2017 12:33 PM > To: Suresh Gupta <[email protected]> > Cc: york sun <[email protected]>; Jagan Teki <[email protected]>; u- > [email protected]; Jagan Teki <[email protected]>; Yao Yuan > <[email protected]> > Subject: Re: [U-Boot] [PATCH] sf: Fix s25fs512s erase size and remove SECT_4K > flag > > Hi Suresh, > > This what I understood based on my previous datasheet read __attached__ > > In spansion S25FS-S family the physical sectors are grouped as normal and > parameter sectors. Parameter sectors are 4kB in size with 8 set located at the > bottom or top address of a device. > Normal sectors are similar to other flash family with sizes of 64kB or 32 kB. > > To erase whole flash using sector erase(D8h or DCh) won't effect the parameter > sectors, so in order to erase these we must use 4K sector erase commands (20h > or 21h) separately. > > So the lower 8 4k sectors are unaffected even if we do sector erase(d8h)? What > if we do 4k erase(20h) whole flash all effected?
Erasing flash with 4k erase(20h) do not erase the whole chip and also not able to erase address Space of remaining sectors of 256 kbytes . this I tried with my experiments. So best way is to disable hybrid mode and configure flash in Uniform Sector Architecture > > thanks! > -- > Jagan Teki > Senior Linux Kernel Engineer | Amarula Solutions U-Boot, Linux | Upstream > Maintainer Hyderabad, India. _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
