Device ID definition of S25FL064L and S25FL064P

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masac_1399806
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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,

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1 Solution
Anonymous
Not applicable

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.

View solution in original post

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2 Replies
Anonymous
Not applicable

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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masac_1399806
Level 2
Level 2
First like received First like given

Thanks!

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