GD25B256EFIRR

Memory IC Overview

The GD25B256EFIRR is a 256 Mbit NOR flash memory device manufactured by GigaDevice. It features a 32 M x 8 organization and operates on a single 2.7 V to 3.6 V power supply. The component supports Standard, Dual, and Quad SPI interfaces with a maximum clock frequency of 133 MHz. It utilizes a uniform sector architecture comprising 4 KByte sectors and 32/64 KByte blocks. The device is housed in an SOP-16 package and is designed for operation within a temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports standard, dual, and quad serial peripheral interface protocols for flexible data transfer rates.
• Includes advanced security features such as software write protection, top/bottom block protection, and one-time programmable security registers.
• Enables execute-in-place (XiP) operations with continuous read capabilities to reduce instruction fetch latency.
• Provides hardware reset functionality via a dedicated pin to ensure system stability during initialization.

Memory IC Applications

• Code storage for embedded systems requiring high-speed execution
• Firmware storage for consumer electronics and IoT devices
• Industrial control applications needing reliable non-volatile memory
• Automotive infotainment and instrument cluster systems

Memory IC Procurement Notes

Verify the specific suffix EFIRR corresponds to the SOP-16 package and reel/cut tape packaging format before ordering. Confirm that the required operating voltage and temperature range align with your system specifications. Ensure compatibility with the host controller's SPI interface modes, particularly regarding the default Quad Enable bit state. Check for any specific lead-free or RoHS compliance requirements mandated by your manufacturing process.

Memory IC Selection Notes

Select this component when a 256 Mbit capacity is required with a uniform sector architecture for simplified erase operations. It is suitable for designs prioritizing high-speed read performance via Quad I/O interfaces. Consider this part if the application demands robust software-based write protection mechanisms and a dedicated hardware reset pin. Verify that the SOP-16 package dimensions fit within the available PCB real estate constraints.

Memory IC Part Context

This device belongs to the GD25B256E series of uniform sector dual and quad serial flash memories. The series is characterized by its support for multiple SPI modes and advanced security features. It is engineered for high endurance and long data retention, making it appropriate for demanding embedded environments where code integrity and fast access are critical.

Memory IC Replacement Considerations

GD25Q256EFIRR

Memory IC FAQ

Is the Quad Enable (QE) bit configurable?

No, the QE bit is permanently set to 1 by default and cannot be changed, ensuring IO2 and IO3 pins are always enabled for Quad SPI operations.

How does the device handle address modes upon power-up?

By default, the device powers up in 3-Byte address mode. This can be configured to start in 4-Byte address mode by setting the ADP bit in the status register.

What is the function of the DNU pin in the SOP-16 package?

The DNU (Do Not Use) pin must be left floating. It may connect to an internal signal inside the device but should not be driven externally.