Winbond Electronics Corporation W25Q256FVEIG TR

Overview

W25Q256FVEIG TR 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 uniform 4KB sector erase capability. It operates from 2.7V to 3.6V, delivers up to 104MHz SPI clock rate (416MHz equivalent Quad I/O), and supports execute-in-place (XIP) for code storage in embedded microcontrollers, boot loaders, and firmware applications.

For engineers reviewing the W25Q256FVEIG TR datasheet, W25Q256FVEIG TR pinout, W25Q256FVEIG TR application, or W25Q256FVEIG TR equivalent, key selection factors include 4-byte addressing support, JEDEC SFDP register compliance, 64-bit unique ID, programmable security registers, and hardware write protection via /WP and /HOLD pins in standard mode.

Technical Context

The W25Q256FVEIG TR implements a flexible SPI-compatible command set with dual- and quad-I/O modes enabled by the non-volatile Quad Enable (QE) bit in Status Register-2. Its architecture supports both 3-byte and 4-byte address modes, with automatic address wrap in continuous read mode requiring only 8 clocks to initiate access.

It integrates three 256-byte one-time-programmable (OTP) security registers, volatile/non-volatile status register bits for block protection (BP3–BP0), top/bottom selection (TB), complement protect (CMP), and output driver strength control (DRV1/DRV0), enabling fine-grained memory lockdown and system-level firmware integrity management.

Key Specifications

Pinout & Package

W25Q256FVEIG TR is packaged in an 8-pad WSON 8×6 mm (Package Code E), with exposed thermal pad. Pin functions are defined for Standard/Dual SPI operation; Quad SPI repurposes /WP and /HOLD as IO2 and IO3 respectively when QE=1.

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 W25Q256FVEIG TR uniquely combines QPI mode, JEDEC SFDP, 64-bit UID, and three OTP security registers in a single 8-pin WSON package-making it optimal for secure, high-performance embedded boot and firmware storage where standardized configuration and cryptographic isolation are required.

Availability

W25Q256FVEIG TR is available at Aetrix Electronics and suitable for boot code storage, firmware update storage, configuration data retention, and secure key storage requiring stable component supply across industrial, automotive, and connected-device production programs.

Supply support for W25Q256FVEIG TR 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 DRAM, and serial flash memory solutions for embedded, communications, and consumer markets.

The W25Q series was designed to deliver high-speed, secure, and space-efficient NOR flash for code execution, firmware storage, and system configuration in resource-constrained microcontroller-based platforms.

FAQ

What is the package type and footprint of the W25Q256FVEIG TR?

The W25Q256FVEIG TR uses an 8-pad WSON (Wafer-Level Small Outline No-lead) package measuring 8 mm × 6 mm with an exposed thermal pad. Its pinout matches the standard 8-pin SOIC/PDIP layout but in a surface-mount, leadless form factor optimized for high-density PCBs. The "E" package code confirms this configuration per Winbond's ordering guide, and the TR suffix indicates tape-and-reel packaging for automated assembly.

Does the W25Q256FVEIG TR support 4-byte addressing, and how is it enabled?

Yes, the W25Q256FVEIG TR supports both 3-byte and 4-byte addressing modes. 4-byte mode is entered via the Enter 4-Byte Address Mode instruction (B7h) and exited with E9h. Once enabled, all subsequent read, program, and erase operations use 32-bit addresses. The ADP bit in Status Register-1 determines power-up default addressing mode, allowing persistent configuration across resets without host reinitialization.

How does the Quad Enable (QE) bit affect pin functionality on the W25Q256FVEIG TR?

The Quad Enable (QE) bit-located in Status Register-2-controls whether /WP and /HOLD pins function as hardware protection inputs or as IO2 and IO3 for Quad SPI. When QE = 0, /WP and /HOLD retain their standard protection roles; when QE = 1, they become bidirectional data lines. This mapping is fixed and irreversible unless QE is cleared, and must be configured before entering Quad mode to avoid bus contention.

What security features does the W25Q256FVEIG TR provide beyond basic write protection?

Beyond /WP pin and BPx bits, the W25Q256FVEIG TR includes three 256-byte one-time-programmable (OTP) security registers locked by LB1–LB3 bits, a 64-bit factory-unique ID for device authentication, JEDEC SFDP for standardized parameter discovery, and configurable output driver strength (DRV1/DRV0) to reduce EMI during high-speed reads. These features collectively support secure boot, firmware attestation, and tamper-resistant key storage.

Can the W25Q256FVEIG TR be used for Execute-in-Place (XIP), and what conditions are required?

Yes, the W25Q256FVEIG TR supports true XIP via its Continuous Read Mode, which minimizes instruction overhead to just 8 clocks for address setup. To enable reliable XIP, the host MCU must support memory-mapped SPI or QPI interface, the flash must be configured in 4-byte mode if >16MB is addressed, and the QE bit must be set for maximum throughput in Quad mode. Winbond confirms XIP viability in application note AN103 for Cortex-M systems.