Winbond Electronics Corporation W25Q64FWSFIG TR

Overview

W25Q64FWSFIG TR from Winbond is a 1.8V, 64M-bit (8MB) serial NOR flash memory supporting Standard/Dual/Quad SPI and QPI interfaces. It features uniform 4KB sectors, 104MHz max clock (416MHz equivalent Quad I/O), 50MB/s continuous read, and integrated security registers. It enables execute-in-place (XIP) code execution in space-constrained embedded systems such as IoT edge nodes and industrial controllers.

For engineers reviewing the W25Q64FWSFIG TR datasheet, W25Q64FWSFIG TR pinout, W25Q64FWSFIG TR application, or W25Q64FWSFIG TR equivalent, key selection criteria include Quad Enable (QE) bit configuration, /HOLD vs /RESET functional mapping, 1.65–1.95V supply compliance, and JEDEC SFDP register support for auto-configuration.

Technical Context

The W25Q64FWSFIG TR implements a multi-mode serial interface with hardware-selectable operation: Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), and QPI (2-clock instruction fetch). Its command set includes Fast Read Quad I/O (EBh), Word Read Quad I/O (E7h), and Octal Word Read (E3h), all requiring QE=1 in Status Register-2.

Internal architecture includes a 256-byte page buffer, 4,096 erasable 4KB sectors, and three 256-byte one-time-programmable (OTP) security registers. Erase/program suspend/resume capability and volatile/non-volatile status register bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1) enable robust firmware update sequencing in real-time systems.

Key Specifications

Pinout & Package

W25Q64FWSFIG TR is packaged in an 8-pin SOIC 208-mil (Package Code SS) with standard SPI-compatible pinout. All pins support 1.8V I/O levels and are compatible with JEDEC JESD8-12A voltage thresholds.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q64FWSFIG TR, MX25L6433FZNI-10G offers simpler interface control but sacrifices 2× throughput and XIP efficiency; S25FL164K0XMFI013 matches QPI capability but omits hardware-enforced security primitives needed for certified firmware storage.

Availability

W25Q64FWSFIG TR is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge gateways, and medical diagnostic displays requiring stable component supply across multi-year production cycles.

Supply support for W25Q64FWSFIG 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 manufacturer specializing in specialty memory solutions, including serial NOR/NAND flash and RAM products for embedded and industrial markets.

The W25Q series was designed specifically for high-reliability, low-voltage embedded applications requiring fast XIP performance, flexible erase architecture, and hardware security - targeting automotive, medical, and industrial control systems.

FAQ

What is the maximum supported SPI clock frequency for W25Q64FWSFIG TR in Quad I/O mode?

The W25Q64FWSFIG TR supports up to 104 MHz on the CLK pin in Quad I/O mode, delivering an effective data rate of 416 MHz (104 MHz × 4 lines). This is confirmed in Section 2 ("Features") and Table 9.6 ("AC Electrical Characteristics") of the official datasheet, where tV (clock period) is specified as 9.6 ns minimum - corresponding to 104.2 MHz. The device maintains timing integrity under 1.65–1.95 V supply and -40°C to +85°C conditions.

Does W25Q64FWSFIG TR support true execute-in-place (XIP) operation?

Yes, W25Q64FWSFIG TR supports true XIP via Continuous Read Mode and Quad I/O instructions. As stated in Section 1 ("General Descriptions"), it allows "efficient memory access with as few as 8-clocks of instruction-overhead to read a 24-bit address", enabling direct CPU instruction fetch without local RAM buffering. The 104 MHz clock and 416 MHz effective throughput meet real-time XIP latency requirements for ARM Cortex-M and RISC-V cores.

How is the /HOLD pin functionality affected when Quad Enable (QE) is set on W25Q64FWSFIG TR?

When the Quad Enable (QE) bit in Status Register-2 is set to 1, the /HOLD pin on W25Q64FWSFIG TR is repurposed as IO3 for Quad SPI communication and loses its hold function. This is explicitly documented in Section 3.3 ("Pin Description") and Section 4.4 ("HOLD"): "When QE=1, the /HOLD pin function is not available since this pin is used for IO3." Hardware hold behavior is only available in Standard or Dual SPI modes with QE=0.

What security features are implemented in W25Q64FWSFIG TR beyond basic write protection?

W25Q64FWSFIG TR includes three 256-byte one-time-programmable (OTP) security registers, a 64-bit unique serial number per device, JEDEC SFDP v1.6 register for self-describing parameters, and individual sector lock/unlock commands (36h/39h). These are detailed in Sections 2 ("Features") and 7.1.9–7.1.13 of the datasheet. Unlike basic /WP pin protection, these features enable cryptographically bound firmware signing, secure key storage, and field-upgradeable trusted boot chains.

Is W25Q64FWSFIG TR compatible with JEDEC-standard Serial Flash Discoverable Parameters (SFDP)?

Yes, W25Q64FWSFIG TR implements JEDEC JESD216B SFDP v1.6, accessible via the 5Ah instruction. The SFDP register contains configurable parameters including erase block sizes, timing values, and command mappings - enabling automatic driver initialization without hard-coded assumptions. This is verified in Section 8.2.30 ("Read SFDP Register") and Section 7.1.14 ("Reserved Bits") of the datasheet.