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The output of RDID command (JEDEC 9Fh) is different between S25FL064L and S25FL064P.
S25FL064L RDID command (JEDEC 9Fh)
Byte Address, Data, Description
00h 01h Manufacturer
01h 60h Device ID – Memory Interface Type
02h 17h Device ID – Density and Features
03h Undefined - Reserved for future use
S25FL064P RDID command(JEDEC 9Fh)
Byte Address, Data, Description
00h 01h Manufacturer
01h 02h Device ID
02h 16h Device ID
03h 4Dh # extended bytes
Questions;
(1) Please tell me the definition of the registration data.
The first data ”01h” shows Cypress, I understand.
But I don’t understand why the second and the third are “60h-17h”’S25FL064L”, and “02h-16h”’S25FL064L”
(2) Why is the third different? I understand that this represents memory’s density, so I expected these are same data.
Best regards,
Solved! Go to Solution.
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Serial NOR
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Hello Saito San,
(1) Please tell me the definition of the registration data.
The first data ”01h” shows Cypress, I understand.
But I don’t understand why the second and the third are “60h-17h”’S25FL064L”, and “02h-16h”’S25FL064L”
A) The first byte is assigned by JEDEC.
The second and third are manufacturers choice. So internally our Flash Business team has decided 60h for FL-L and 02h for FL-P for second byte. Similarly for the third byte. There is no special/specific reason.
(2) Why is the third different? I understand that this represents memory’s density, so I expected these are same data.
A) For the latest devices we are using 17h for 64Mb density. For older devices we used 16h. Even for 64Mb FS-S device it is 17h.
so 17h is latest convention for 64Mb density.
Thanks,
Krishna.
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Hello Saito San,
(1) Please tell me the definition of the registration data.
The first data ”01h” shows Cypress, I understand.
But I don’t understand why the second and the third are “60h-17h”’S25FL064L”, and “02h-16h”’S25FL064L”
A) The first byte is assigned by JEDEC.
The second and third are manufacturers choice. So internally our Flash Business team has decided 60h for FL-L and 02h for FL-P for second byte. Similarly for the third byte. There is no special/specific reason.
(2) Why is the third different? I understand that this represents memory’s density, so I expected these are same data.
A) For the latest devices we are using 17h for 64Mb density. For older devices we used 16h. Even for 64Mb FS-S device it is 17h.
so 17h is latest convention for 64Mb density.
Thanks,
Krishna.
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Thanks!