Overview
Description
The AT25SF321B is a member of our standard class code and data storage solutions designed for 3V systems in which program code is shadowed from Flash memory into embedded or external RAM for execution.
The architecture includes erase block sizes that are optimized to meet the needs of today's code and data storage applications and three security register pages for unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key storage, etc.
- Universally compatible pinout and command set
- Standard block architecture
- Supports Dual I/O, Quad I/O and XiP operation
- Continuous read, wrap and burst modes for XiP
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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AT25SF321B and AT25SF321 Programming
Is there a difference between AT25SF321B and AT25SF321 other than speed and operating voltage and with a programmer that can program AT25SF321, can I program AT25SF321B too?
Sep 22, 2022 -
AT25SF321B volatile status register bits
Which bits in the status register of the AT25SF321B are volatile, and which are non-volatile? The datasheet talks about volatile and non-volatile bits, but I can't find a table of which ones are which. In particular, is the Quad Enable bit volatile or non volatile (i.e ...
Sep 11, 2023 -
Detecting #WP pin state on AT25FF321A and AT25SF321B
For both the AT25FF321A and AT25SF321B that are configured for hardware protection with the #WP pin (SRP1,0 = 01) what is the lowest impact way of detecting the state of the #WP pin (ability to write to status registers)? As most of the R/W status register ...
Nov 14, 2021
FAQs
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"B" suffix NOR flash Part numbers
... a newer part than a part without the suffix "B". It has enhanced features. Example AT25SF321 vs AT25SF321B ==> AT25SF321B is a newer part than AT25SF321. AT25SF321B has new additional commands and improved performance. AT25SF321B has a 108 MHz Maximum Operating Frequency vs 104 MHz for AT25SF321 AT25SF321B Operating voltages 2 ...
Apr 13, 2023