Winbond Electronics Corporation W25Q256FVEIQ

Overview

W25Q256FVEIQ from Winbond is a 256M-bit (32MB) serial NOR flash memory supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 131,072 × 256-byte pages with 4KB uniform sector erase, 104MHz max clock, and single 2.7–3.6V supply. It enables XIP execution in embedded boot code storage and firmware update applications.

For engineers reviewing the W25Q256FVEIQ datasheet, W25Q256FVEIQ pinout, W25Q256FVEIQ application, or W25Q256FVEIQ equivalent, key selection factors include 4-byte addressing support, Quad Enable (QE) bit configuration, /HOLD or /RESET dual-function pin behavior, and JEDEC SFDP register compatibility for auto-configuration.

Technical Context

The W25Q256FVEIQ implements a flexible SPI command architecture with three address modes (3-byte, 4-byte, and ADP-configurable), where 4-byte mode is entered via B7h instruction and exits via E9h. Its status register set includes volatile/non-volatile BP bits, QE bit (SR2[1]), HOLD/RST function control (SR2[6]), and DRV strength settings (SR2[5:4]).

It supports concurrent erase/program suspend-resume operations, programmable output driver strength (DRV0/DRV1), and hardware write protection via /WP pin - active only when QE=0. The /HOLD pin functions as IO3 in Quad mode and as dedicated hold input in Standard/Dual mode, with behavior governed by SR2[6] and QE state.

Key Specifications

Pinout & Package

W25Q256FVEIQ is packaged in an 8-pad WSON 8×6 mm (Package Code E) with exposed thermal pad. Pin 1 is /CS; pins 2–3 and 5–7 are bidirectional I/Os configurable for SPI/Dual/Quad operation; pin 4 is GND; pin 8 is VCC. /WP and /HOLD share IO2/IO3 roles depending on QE bit state.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash memory applications.

Compared with MX25L25645GMI-10G and S25FL256SAGMFI000, the W25Q256FVEIQ delivers higher throughput via QPI and greater pin-function flexibility (/HOLD or /RESET), making it optimal for cost-sensitive, high-speed embedded boot applications where SPI ecosystem maturity matters most.

Availability

W25Q256FVEIQ is available at Aetrix Electronics and suitable for boot code storage, firmware update storage, secure configuration storage, and industrial HMI display firmware requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for W25Q256FVEIQ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Winbond Electronics is a Taiwan-based semiconductor manufacturer specializing in specialty memory solutions, including serial flash, mobile DRAM, and code storage devices for embedded and consumer markets.

The W25Q256FVEIQ belongs to Winbond's W25Q256FV family - designed specifically for high-performance, space-constrained embedded systems needing reliable, fast, and secure code and data storage with multi-interface flexibility.

FAQ

What is the package type and lead count of the W25Q256FVEIQ?

The W25Q256FVEIQ uses an 8-pad WSON (8×6 mm) package with exposed thermal pad (Package Code E). It has 8 terminals: /CS, DO/IO1, /WP/IO2, GND, DI/IO0, CLK, /HOLD or /RESET/IO3, and VCC. This compact footprint supports high-density PCB layouts while maintaining thermal performance for continuous read operations.

Does the W25Q256FVEIQ support 4-byte addressing, and how is it enabled?

Yes, the W25Q256FVEIQ supports 4-byte addressing for full 256M-bit access. It is enabled either by issuing the Enter 4-Byte Address Mode instruction (B7h) or by setting the ADP bit (SR1[7]) to 1 for power-up default. The ADP bit is non-volatile and persists across power cycles, ensuring consistent addressing behavior without host reinitialization.

How does the /HOLD pin function differ between Standard SPI and Quad SPI modes on the W25Q256FVEIQ?

In Standard/Dual SPI mode (QE=0), the /HOLD pin (Pin 7) acts as a dedicated active-low pause signal. In Quad SPI mode (QE=1), Pin 7 becomes IO3 - a bidirectional data line - and the /HOLD function is disabled. This behavior is controlled solely by the Quad Enable (QE) bit in Status Register-2 and cannot be overridden by external logic.

What is the purpose of the QE bit in Status Register-2 of the W25Q256FVEIQ?

The QE bit (SR2[1]) in the W25Q256FVEIQ controls Quad SPI operation: when set to 1, it enables IO2 and IO3 (i.e., /WP and /HOLD pins become data lines), allowing Quad I/O instructions. When cleared to 0, those pins revert to their hardware protection functions. QE is non-volatile and survives power cycles unless explicitly rewritten via Write Status Register-2 (31h) instruction.

Can the W25Q256FVEIQ be used for execute-in-place (XIP) applications, and what features enable this?

Yes, the W25Q256FVEIQ supports true XIP via its Continuous Read Mode and Fast Read Quad I/O (6Bh/6Ch) instructions, achieving up to 416 MB/s effective throughput. Key enablers include 8-clock instruction overhead for address setup, QPI's 2-clock command cycle, and uniform 4KB sector layout that simplifies cache-line-aligned access - all verified in Winbond's W25Q256FV datasheet Section 2 and Figure 2.