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Hi,
Could S25FL256SAG be replaced by S25FL256SDP if I am using it in SDR mode and single MISO data line?
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Hello,
Thank you for contacting Cypress Semiconductor Corp.
Yes, the S25FL256SDPxx can replace the S25FL256SAGxx, as the maximum operating frequency using single SPI mode is 50MHz.
S25FL256SDPxx = Max. operating frequency is 66MHz in DDR mode with Latency Code set at default "00"
S25FL256SAGxx = Max. operating frequency is 133MHz in Fast Read, Read Dual Out, Read Quad Out, Dual I/O Read and Quad I/O Read with Latency Code set at "10" (non-default value).
Please refer to page 52 & 53, Table 27 & 28 for the appropriate max. operating frequency and latency code settings. The S25FL-S datasheet if attached for your reference and review.
Best regards,
Albert
Cypress Semiconductor Corp.
An Infineon Technologies Company
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Hello,
Thank you for contacting Cypress Semiconductor Corp.
Yes, the S25FL256SDPxx can replace the S25FL256SAGxx, as the maximum operating frequency using single SPI mode is 50MHz.
S25FL256SDPxx = Max. operating frequency is 66MHz in DDR mode with Latency Code set at default "00"
S25FL256SAGxx = Max. operating frequency is 133MHz in Fast Read, Read Dual Out, Read Quad Out, Dual I/O Read and Quad I/O Read with Latency Code set at "10" (non-default value).
Please refer to page 52 & 53, Table 27 & 28 for the appropriate max. operating frequency and latency code settings. The S25FL-S datasheet if attached for your reference and review.
Best regards,
Albert
Cypress Semiconductor Corp.
An Infineon Technologies Company
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Thanks!
A somewhat related question regarding the write speed. I've reached several kbyte/s write speed in SDR mode. Most of the time is spent waiting while WIP is asserted. The datasheet lists write speed 1000kbyte/s. Could I expect to reach higher writespeed in SDR mode with S25FL256SAG ? If yes, what could be the issue/s?
The SPI protocol is implemented with help from this doc AN98542 Designing a Serial Peripheral Interface