BY25Q128ASFIG(T)

Memory IC Overview

The BY25Q128AS is a 128M-bit Serial Peripheral Interface (SPI) NOR Flash memory device manufactured by BYTe Semiconductor. It supports Standard, Dual, and Quad SPI modes with clock rates up to 108MHz for Fast Read. The architecture includes uniform 4KB sectors and 32/64KB blocks. Operating voltage ranges from 2.7V to 3.6V. Key features include software/hardware write protection, three 256-byte security registers with OTP locks, and support for continuous read with wrap modes.

Memory IC Feature Summary

• Supports Standard, Dual, and Quad SPI interfaces for flexible data transfer speeds.
• Provides flexible software and hardware write protection mechanisms including block protect bits and status register locking.
• Includes three 256-byte Security Registers with One-Time Programmable (OTP) lock capabilities.
• Features program and erase suspend/resume functionality for efficient system management.

Memory IC Applications

• Code shadowing to RAM
• Direct execution from Dual/Quad SPI (XIP)
• Storage of voice, text, and data in embedded systems

Memory IC Procurement Notes

Verify the specific package variant (SOP or WSON) and temperature grade required for your design. Confirm that the ordering suffix matches the desired pin configuration and environmental rating. Ensure compatibility with host controller SPI modes before finalizing procurement.

Memory IC Selection Notes

Select this component when high-density non-volatile storage with fast read speeds is required. Consider the Quad SPI mode for applications needing high throughput. Evaluate the power consumption requirements against the active and standby current specifications. Ensure the operating temperature range meets the application environment.

Memory IC Part Context

This part belongs to the BY25Q128 series of SPI NOR Flash memories. It is designed for applications requiring reliable data storage with flexible access modes. The device integrates advanced protection features and supports JEDEC standard identification protocols for easy integration into various embedded platforms.

Memory IC Replacement Considerations

Check pinout compatibility and electrical characteristics when substituting. Verify if the alternative device supports the same Quad SPI instructions and protection features. Ensure the replacement offers equivalent endurance and data retention specifications.

Memory IC FAQ

How is the Quad SPI mode enabled?

Quad SPI mode is enabled by setting the Quad Enable (QE) bit in Status Register 2 to 1.

What happens to the /WP and /HOLD pins in Quad mode?

When QE is set to 1, the /WP and /HOLD pins function as bidirectional I/O pins IO2 and IO3 respectively.

Can the Security Registers be modified after being locked?

No, the Lock Bits (LB) for the Security Registers are One-Time Programmable (OTP). Once set to 1, they become permanently read-only.