SPI NOR flash reference schematic - KBA230681
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Jun 24, 2020
05:04 AM
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Jun 24, 2020
05:04 AM
Author: SudheeshK_26 Version: **
Translation - Japanese: Cypress SPI NOR Flash Memoryのリファレンス回路図 - KBA230681- Community Translated (JA)
Question:
Is there any reference schematic for Cypress SPI NOR flash devices available?
Answer:
Infineon SPI NOR flash devices can be directly connected to memory controllers. However, you must use a simple pull-up resistor on the CS# signal for proper power-up and power-down. Figure 1 shows a SPI NOR flash device reference schematic using S25FL512S.
Reference Schematic Diagram
Best practices:
- Use IBIS models from Infineon to simulate signal integrity before finalizing the design:
(a) Standard QSPI flash IBIS models
(b) SEMPER™ flash IBIS models - Based on simulations of signal integrity, add series termination resistors to SPI signals. The recommended series termination resistor values are 33 Ω, 66 Ω, and 100 Ω.
- HOLD#, WP#, and RESET# pins have a low internal pull-up resistor; leave these open if not used.
- Keep NC, DNU, and RFU pins unconnected.
See AN98508 for Infineon serial flash device layout guidelines
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- circuit diagram
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- fl-l
- fl-p
- fl-s
- fs-s
- nor flash
- pcb design
- reference schematic
- s25fl-l
- s25fl-s
- s25fs-s
- schematic diagram
- schematics
- serial
- serial flash
- signal integrity
- spi
- spi flash
- spi nor
- timing
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