Winbond Electronics Corporation W25Q256FVEIP TR

Overview

W25Q256FVEIP 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 4KB uniform sectors, operating from 2.7V–3.6V, and rated for -40°C to +85°C industrial temperature range. It enables XIP (execute-in-place) code execution in embedded microcontrollers and stores firmware, configuration data, and boot images.

For engineers reviewing the W25Q256FVEIP TR datasheet, W25Q256FVEIP TR pinout, W25Q256FVEIP TR application, or W25Q256FVEIP TR equivalent, this device supports 80MHz SPI clocking (320MB/s Quad I/O throughput), hardware write protection via /WP and /HOLD pins, JEDEC ID/SFDP register compliance, and 64-bit unique serial number - critical for secure boot, firmware update, and BOM traceability in space-constrained designs.

Technical Context

The W25Q256FVEIP TR implements a flexible SPI command architecture with three address modes (3-byte, 4-byte, and ADP-configurable power-up default), enabling seamless migration from legacy 16MB+ systems without address wrap limitations. Its dual-mode /HOLD or /RESET pin (configurable via Status Register bit HOLD/RST) and non-volatile Quad Enable (QE) bit allow runtime switching between standard SPI and high-speed Quad I/O operation.

Internally, it integrates dedicated logic for erase/program suspend-resume, individual sector/block lock/unlock, and three 256-byte one-time-programmable (OTP) security registers. The status register set includes volatile/non-volatile BP bits, SRP lock controls, and DRV output strength settings - all accessible via standardized SPI instructions like 01h/31h/11h writes and 05h/35h/15h reads.

Key Specifications

Pinout & Package

W25Q256FVEIP TR uses an 8-pad WSON 8×6-mm package (Package Code E), RoHS-compliant and halogen-free, with exposed pad for thermal dissipation. Pin 1 is /CS; pins 2–3–5–7 are bidirectional IOs (IO1, IO2, IO0, IO3); pin 4 is GND; pin 6 is CLK; pin 8 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25645GM2I-12G, W25Q256FVEIP TR delivers 2× faster effective throughput via Quad I/O and enables true XIP through Continuous Read with Wrap; versus S25FL256SAGMFI000, it offers identical density and industrial temp rating in smaller WSON package but lacks on-die ECC and Octal mode - making it optimal for cost-sensitive, space-constrained embedded designs prioritizing SPI compatibility and firmware security.

Availability

W25Q256FVEIP TR is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, medical diagnostics equipment, and IoT edge gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25Q256FVEIP 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 is designed specifically for high-performance, secure, and space-efficient code storage in microcontroller-based systems - emphasizing XIP capability, robust write protection, and industry-standard command compatibility.

FAQ

What is the package type and lead count of the W25Q256FVEIP TR?

W25Q256FVEIP TR uses an 8-pad WSON (8×6-mm) package with exposed thermal pad, designated Package Code E in Winbond documentation. It has no leads; the eight conductive pads serve as electrical terminals and thermal interface. This compact RoHS-compliant package is optimized for high-density PCB layouts in industrial and automotive applications.

Does W25Q256FVEIP TR support 4-byte addressing, and how is it enabled?

Yes, W25Q256FVEIP TR supports both 3-byte and 4-byte addressing modes. The 4-byte mode is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h); it can be exited using E9h. The ADP bit in Status Register-3 determines the default power-up address mode - non-volatile setting ensures consistent behavior across reboots without host reconfiguration.

How does the /HOLD pin function differ between Standard SPI and Quad SPI modes on W25Q256FVEIP TR?

In Standard/Dual SPI mode (QE=0), Pin 7 functions as /HOLD to pause ongoing transactions. In Quad SPI mode (QE=1), Pin 7 becomes IO3 and /HOLD is disabled; the HOLD/RST bit in Status Register-3 instead configures Pin 7 as /RESET. This dual-role design allows flexible use of the same pin while maintaining backward compatibility and enabling hardware reset capability where needed.

What security features are implemented in W25Q256FVEIP TR beyond basic write protection?

W25Q256FVEIP TR includes three 256-byte one-time-programmable (OTP) security registers, a 64-bit factory-unique serial number, JEDEC SFDP register for standardized parameter discovery, and programmable lock bits (LB1–LB3) for permanent security register protection. These features collectively support secure boot key storage, device identity binding, and tamper-resistant firmware signing - meeting foundational requirements for IEC 62443 and ISO/SAE 21434 compliance.

Can W25Q256FVEIP TR be used for execute-in-place (XIP) operation, and what conditions are required?

Yes, W25Q256FVEIP TR supports true XIP operation via its Continuous Read mode with Wrap, requiring only 8 clock cycles to initiate a read after address setup. To enable XIP, the host MCU must support memory-mapped SPI flash access, the device must be configured in Quad I/O or QPI mode for maximum throughput, and the 4KB sector containing executable code must be unlocked and unprotected - verified via Status Register BP bits and /WP pin state.