W25Q64 64Mbit SPI Flash Storage Module
High-Speed Serial Flash Memory for Microcontroller Projects
The W25Q64 is a 64Mbit (8Mbyte) serial NOR Flash memory module designed for reliable data storage and code execution [citation:2][citation:5]. It is widely used for firmware storage, data logging, and voice/text storage in embedded systems [citation:6].
64Mbit Storage Capacity Provides 8MB of nonvolatile memory for your projects
HighSpeed SPI Interface Supports up to 133MHz clock with Quad SPI mode
Operating voltage: 2.7V to 3.6V [citation:2][citation:6]
Memory organization: 32,768 pages of 256 bytes each [citation:3][citation:6]
More than 100,000 erase/program cycles [citation:6]
More than 20-year data retention [citation:6]
Key Features
+Supports Standard, Dual, and Quad SPI for flexible interface options [citation:2][citation:3]
+Uniform 4KB sectors and 32KB/64KB blocks for efficient erase operations [citation:2][citation:6]
+Low power consumption: 4mA active read current, 1µA power-down current [citation:2][citation:3]
+Hardware and software write protection features [citation:3][citation:6]
+64-bit unique ID and JEDEC standard manufacturer/device ID [citation:3][citation:6]
= Applications =
- Code shadowing and executeinplace (XIP) for microcontrollers [citation:5][citation:6]
- Data logging, voice, and text storage [citation:5][citation:6]
- Firmware storage and system configuration [citation:6]
- IoT devices and industrial control systems [citation:6]
Reliable Storage Solution - Proven SpiFlash technology from Winbond
Easy Integration - SPI interface works with Arduino, STM32, ESP32
√ 64Mbit (8MB) capacity for moderate storage needs
√ Available in SOIC8, WSON8, and other packages [citation:6][citation:9]
√ Compatible with 3.3V logic systems [citation:2][citation:6]
Hardware Interface
| Pin | Function | Arduino Connection |
|---|
| CS | Chip Select | Digital Pin 10 (example) |
| CLK | Serial Clock | Pin 13 (SCK) |
| DI (MOSI) | Data Input | Pin 11 (MOSI) |
| DO (MISO) | Data Output | Pin 12 (MISO) |
| VCC | Power (2.7-3.6V) | 3.3V |
| GND | Ground | GND |
> Use the SPIMemory library in Arduino IDE for easy interfacing [citation:4][citation:8]
For 5V systems, use a module with onboard level shifting [citation:11][citation:12]
Chips come blank and do not have a wear-leveling subsystem [citation:11][citation:12]
Troubleshooting
Module not detected:
- Verify VCC is within 2.7-3.6V range
- Check SPI connections (MISO, MOSI, SCK, CS)
- Ensure CS pin is pulled LOW to start transaction
No data read/write:
- Use 3.3V logic level for direct connection
- For 5V systems, use a level shifter module [citation:11][citation:12]
- Verify library initialization and SPI settings