Winbond Electronics Corporation W25Q256FVEJQ

Overview

W25Q256FVEJQ from Winbond is a 256M-bit (32MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 131,072 × 256-byte pages with 4KB uniform sector erase granularity, operating from 2.7V–3.6V, and rated for -40°C to +85°C industrial temperature range - used for code execution (XIP), firmware storage, and parameter retention in embedded microcontrollers and SoCs.

For engineers reviewing the W25Q256FVEJQ datasheet, W25Q256FVEJQ pinout, W25Q256FVEJQ application, or W25Q256FVEJQ equivalent, key selection criteria include 104MHz SPI clock support, Quad I/O mode enablement via QE bit, 4KB sector flexibility, hardware /WP and /HOLD control, and JEDEC SFDP register compatibility for auto-configuration.

Technical Context

The W25Q256FVEJQ implements a multi-mode serial interface controller supporting three distinct protocols: standard single-I/O SPI (CLK, /CS, DI, DO, /WP, /HOLD), dual-I/O SPI (IO0/IO1), and quad-I/O SPI (IO0–IO3), with QPI enabling 2-clock instruction cycles. Its internal architecture includes a 256-byte page buffer, sector/block erase logic, and triple 256-byte security registers with OTP lock capability.

It features volatile and non-volatile status register bits (BP0–BP3, TB, CMP, SRP0/SRP1, QE, ADS/ADP, DRV0/DRV1, HOLD/RST) that govern memory protection, address mode persistence, driver strength, and pin function remapping - with /WP and /HOLD repurposed as IO2 and IO3 respectively when QE=1 in Quad mode.

Key Specifications

Pinout & Package

W25Q256FVEJQ is packaged in an 8-pad WSON 8×6 mm (Package Code E), with exposed pad thermal design and RoHS-compliant finish. Pin functions are defined per JEDEC-standard SPI interface behavior and configurable via status register bits.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25635F and S25FL256S, the W25Q256FVEJQ delivers balanced performance, security, and interoperability - offering QPI acceleration and SFDP-based host negotiation without requiring board-level changes or sacrificing endurance or retention.

Availability

W25Q256FVEJQ is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25Q256FVEJQ 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 company specializing in specialty DRAM, mobile RAM, and serial flash memory solutions since 1987.

The W25Q series was designed for high-performance, space-constrained embedded systems requiring reliable code storage, fast XIP execution, and flexible security - targeting microcontroller-based platforms across industrial, automotive, and consumer markets.

FAQ

What is the package type and footprint of the W25Q256FVEJQ?

The W25Q256FVEJQ uses an 8-pad WSON 8×6 mm package (JEDEC MO-241AC, Package Code E) with exposed thermal pad. It has a 0.5 mm pitch, 2.0 mm body height, and requires solder mask-defined pads per Winbond's recommended land pattern - no leaded alternatives or SOIC variants share this exact part number suffix.

Does the W25Q256FVEJQ support 4-byte addressing mode, and how is it enabled?

Yes, the W25Q256FVEJQ supports 4-byte addressing for access beyond 16 MB. It is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h); the setting persists until Exit 4-Byte Address Mode (E9h) is executed or power is cycled. The ADP bit in Status Register-1 controls power-up default mode.

How does the /WP pin behave when Quad SPI mode is active on the W25Q256FVEJQ?

When the Quad Enable (QE) bit in Status Register-2 is set to 1, the /WP pin is reassigned as IO2 and loses its hardware write-protect function. Hardware write protection remains available only in Standard or Dual SPI modes (QE=0), where /WP actively inhibits status register writes when pulled low.

What is the role of the SFDP register in the W25Q256FVEJQ, and how is it accessed?

The SFDP (Serial Flash Discoverable Parameters) register in the W25Q256FVEJQ is a JEDEC JESD216-compliant 256-byte table providing host controllers with vendor-independent timing, voltage, and command-set metadata. It is read using instruction 5Ah with a 3-byte address (000000h), enabling automatic configuration without hard-coded parameters.

Can the W25Q256FVEJQ be used for execute-in-place (XIP) operation, and what conditions are required?

Yes, the W25Q256FVEJQ supports true XIP via Continuous Read Mode with wrap lengths up to 64 bytes and ≤8-clock instruction overhead. Required conditions include enabling Quad I/O mode (QE=1), configuring appropriate drive strength (DRV0/DRV1), and ensuring host controller supports QPI or Fast Read Quad I/O (6Bh/6Ch) with proper timing margins.