Can Semper S28HS-T/S28HL-T Octal Flash operate in either QPI or QSPI mode? – KBA231294
- Subscribe to RSS Feed
- Mark as New
- Mark as Read
- Bookmark
- Subscribe
- Printer Friendly Page
- Report Inappropriate Content
Author: AlbertB_56 Version: **
There is no provision to support either QPI or QSPI modes of operation. The Semper™ S28HS-T and S28HL-T series is a memory device with an octal interface that supports both Octal (x8) Peripheral Interface (OPI), as well as legacy Serial (x1) Peripheral Interface (SPI). However, the default data bus width setting from the factory is Serial (x1) mode. Configuration Register-5, bit-0 (CFR5x[0]) is user-defined, in either SPI (x1) mode or OPI (x8) data bus width. SPI (x1) mode supports SDR (1S-1S-1S) only; OPI (x8) mode supports both SDR (8S-8S-8S) and DDR (8D-8D-8D). Therefore, QPI (4-4-4) and QSPI (1-4-4) modes are not supported.
See the following sections in the S28HS-T/S28HL-T datasheet:
- “Transaction Protocol” for SPI and Octal protocol definitions
- “Configuration Register 5 - CFR5x” for selection of either SPI (x1) or Octal (x8) modes
- “Transaction Table” for specific SPI and Octal transition functions, names, and commands
See the condensed Octal Flash datasheet: https://www.cypress.com/file/424156/download
Register for the Semper Access Program to get access to full datasheets, application notes, models, software, and evaluation kits:
https://www.cypress.com/products/semper-nor-flash-memory
References:
Semper S28HS-T/S28FL-T Octal Flash datasheet (complete): Document Number: 002-18216 Rev. *S
- Tags:
- address bus
- data bus
- datasheet
- ddr
- flash
- hl-t
- hs-t
- interface
- nor flash
- octal
- quad
- sdr
- semper flash
- serial
- spi
- width