GD25Q256D / GigaDevice Semiconductor (Beijing) Inc.

GD25Q256D Datasheet with Chat AI

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Part No.	GD25Q256D
Manufacturer	GIGADEVICE
Size	1Mb
Pages	89 pages
Description	3.3V Uniform Sector Dual and Quad Serial Flash

Datasheet Summary with AI

1. Device Overview:

️· What it is: A 32 Mbit (32MB) NAND flash memory.
️· Purpose: Primarily for data storage in embedded systems.

2. Features:

️· NAND Flash Architecture: Uses a NAND flash memory architecture.
️· Wide Voltage Range: Likely supports a wide operating voltage (details not explicitly stated in this excerpt).
️· Data Protection: Includes various data protection mechanisms:
- Write Enable (WREN) control.
- Software protection (Block Protect, Top/Bottom protect).
- Hardware protection (WP# pin).
- Deep Power-Down Mode.
️· Status Registers: Multiple status registers (Status Register-1, -2, -3) providing information and control options.
️· Error Handling: Includes flags to indicate program and erase errors.
️· Flexible operation: Includes multiple modes (Program, Erase, Read) with suspend capabilities
️· OTP(One Time Programmable) functionality Uses OTP memory for locking security bits.

3. Key Data Protection Methods (in detail):

️· Block Protection: Allows the user to protect sections of the memory from being modified by setting bits BP0-BP3 and TB. The provided table details the size of the protected area based on these settings. Protecting against modifications.
️· Hardware Protection (WP#): Asserting the WP# pin activates a global hardware lock, further securing the memory.
️· Deep Power-Down: Minimizes power consumption but restricts operations to a release command.

4. Status Registers Summary

️· Status Register-1: (WIP, WEL, BP0-BP3, TB, SRP0) - Key status bits like "Write in Progress," "Write Enable," and block protection flags.
️· Status Register-2: (ADS, QE, SUS2, LB1-LB3, SRP1, SUS1) - Contains address mode, Quad Enable, security register bits and suspend flags
️· Status Register-3: (Reserved, PE, EE, ADP, DRV0-1, HOLD/RST) - Includes power-up address mode bits and Output Driver strength bits.

5. Critical Control/Status Bits:

️· WIP (Write In Progress): Indicates whether the memory is busy.
️· WEL (Write Enable Latch): Determines write ability.
️· QE (Quad Enable): Enables quad-mode operation (important for read speed).
️· HOLD/RST: Configures the behavior of the HOLD# and RESET# pins.