GD25B512MEFIRR

GD25B512MEFIRR is a 512-Mbit (64 MB) serial flash memory from GigaDevice. It uses an SPI-compatible interface and is intended for firmware storage, code boot, and data logging in embedded systems.
Key points:
- Capacity and interface: 512 Mbit, serial flash with standard SPI and Quad I/O modes for higher throughput.
- Addressing and organization: 26-bit address space (0x000000 to 0x3FFFFFF), 256-byte page size; supports sector/block/chip erase.
- Power and speed: designed for low-voltage operation (typical 2.7–3.6 V) with read speeds up to tens of MHz (often up to ~104 MHz in practice); supports standard and fast/Quad reads.
- Features: write enable/disable, status register, sector/block erases, page program, and protection mechanisms (WP/BP) for reliability.
- Packaging: 8-pin package; suffixes like IRR indicate packaging/reel options; check datasheet for precise temp range and packaging.
- Applications: firmware storage, boot memory, microcontroller projects, and general non-volatile code/data storage.
Usage tip: use WREN, READ, FAST READ, PP, and ERASE commands per the datasheet. For exact timings, voltage range, and command codes, consult the GD25B512MEFIRR datasheet.

Here are typical features for GD25B512MEFIRR (concise):
- Serial NOR flash, 512 Kbit capacity (64 KB)
- SPI serial interface: standard and fast read commands
- Operating voltage: 2.7–3.6 V (industrial grade options usually -40 to 85°C)
- Addressing: 16-bit addressing (no 4-byte addressing required for this density)
- Page program: up to 256 bytes per write
- Erase architecture: 4 KB sectors; 32 KB and 64 KB blocks
- Endurance: around 100k program/erase cycles
- Data retention: typically >20 years
- Power modes: active, deep power-down; low current in standby
- Security/protection: hardware write protection via status register
- Packaging: 8-pin package (RoHS compliant)
- Applications: code boot memory, parameter storage, data logging
Note: exact electrical specs, timing, and temperature range can vary by revision; please consult the official datasheet for precise figures.

8-pin SOP (SOIC) package.

- Pin count: 8 pins (8‑lead package, e.g., SOP-8).
- Function: 512-Mbit serial NOR flash memory with an SPI-compatible interface (CS, CLK, SI, SO, WP, HOLD, VCC, GND) for non-volatile storage of code/data, with typical operations such as read/fast read, page program, sector/block erase, and chip erase.

- Manufacturer: GigaDevice Semiconductor Inc. (GD).
- What kind of company: A Beijing-based fabless semiconductor company that designs and markets memory ICs (NOR/NAND flash, SRAM, microcontrollers) and uses external foundries for fabrication.

GD25B512MEFIRR is a 512-Mbit serial flash memory. Common application areas:
- Boot code and firmware storage for microcontrollers/SoCs
- Application code and data storage in embedded devices (routers, set-top boxes, cameras, printers)
- Firmware update and recovery storage (image storage for OTA-style updates)
- Data logging, configuration, and asset-tracking in IoT and industrial equipment
- Bootable image storage for network/consumer devices and other embedded systems

Equivalent SPI-NOR flash (512 Mbit) from other vendors:
- Winbond W25Q512JV
- Macronix MX25L51245G (also MX25U51245G)
- Spansion/Cypress S25FL512S
- ISSI IS25LP512D (IS25LP512F)
- Micron N25Q512A
Note: verify voltage, timing, sector size/maps, and package compatibility for your design.