The part number "GD25Q128ESIG" corresponds to a GigaDevice flash Memory device, specifically a 128Mb (16MB) Serial Flash Memory. The "GD25Q128ESIG" part is part of the GD25Q series of SPI NOR Flash memory from GigaDevice, and it is used for storage applications in various embedded systems.
Package Type and Pinout
The GD25Q128ESIG typically comes in an 8-pin SOIC (Small Outline Integrated Circuit) or WSON (Wafer Level Chip-Scale Package), among other standard packaging options.
Pinout and Detailed Functionality of Pins for GD25Q128ESIG:
Here's the detailed pin function specification for an 8-pin SOIC package (common for GD25Q128ESIG):
Pin Number Pin Name Function 1 VCC Power supply pin (3.3V or 2.5V) 2 DO Data Output (SPI interface ) 3 /WP Write Protect (Active Low) 4 GND Ground pin 5 /RESET Reset (Active Low) 6 /CS Chip Select (Active Low, SPI) 7 DI Data Input (SPI interface) 8 CLK Clock (SPI interface)Pin Functions Description:
Pin 1 - VCC: This is the power supply pin. The GD25Q128ESIG operates with a supply voltage of 2.5V to 3.6V.
Pin 2 - DO (Data Output): This pin is used for the data output in SPI communication mode. It provides the data being read from the flash memory. It is connected to the Master’s MISO (Master In Slave Out) pin.
Pin 3 - /WP (Write Protect): The /WP pin is used to enable or disable write protection. When it is driven low, the memory device is write-protected, preventing accidental writes to the memory. If not used, this pin can be tied to VCC (high level).
Pin 4 - GND: This is the ground pin for the device.
Pin 5 - /RESET: This pin is used to reset the device. It is active low, meaning pulling this pin low will reset the memory device.
Pin 6 - /CS (Chip Select): This pin is used to select the memory chip in SPI mode. It is active low, meaning that when it is pulled low, communication with the chip begins. The device is inactive when this pin is high.
Pin 7 - DI (Data Input): This pin is used for the data input in SPI mode. It is connected to the Master’s MOSI (Master Out Slave In) pin for sending commands and data to the device.
Pin 8 - CLK (Clock): This is the clock signal for SPI communication. It controls the timing for data transfer in the SPI protocol.
FAQ: Common Questions on GD25Q128ESIG
Q: What is the operating voltage of GD25Q128ESIG? A: The GD25Q128ESIG operates at a voltage of 2.5V to 3.6V.
Q: How do I interface with the GD25Q128ESIG? A: You interface with the GD25Q128ESIG using the SPI (Serial Peripheral Interface) protocol, with pins for data input (DI), data output (DO), clock (CLK), and chip select (/CS).
Q: Can I use the GD25Q128ESIG with a 5V supply? A: No, the GD25Q128ESIG is designed to operate at 2.5V to 3.6V, so a 5V supply is not recommended.
Q: What is the role of the /WP pin? A: The /WP (Write Protect) pin is used to enable or disable write protection. It prevents writes to the memory when pulled low.
Q: What happens when the /RESET pin is pulled low? A: When the /RESET pin is pulled low, the GD25Q128ESIG is reset, and the internal state of the device is cleared.
Q: What is the pinout of the GD25Q128ESIG? A: The GD25Q128ESIG has an 8-pin configuration with VCC, DO, /WP, GND, /RESET, /CS, DI, and CLK as its pins.
Q: How do I perform a read operation from the GD25Q128ESIG? A: To read data from the GD25Q128ESIG, use the SPI protocol: set /CS low, send the read command, and read the data from the DO pin.
Q: How do I write data to the GD25Q128ESIG? A: To write data, use the SPI protocol: send the write command, followed by the data you want to write, while ensuring that /WP is not active.
Q: Can I use GD25Q128ESIG for high-speed applications? A: Yes, the GD25Q128ESIG supports high-speed SPI communication, making it suitable for high-speed applications, such as in embedded systems.
Q: Is the GD25Q128ESIG compatible with 3.3V logic? A: Yes, the GD25Q128ESIG is compatible with 3.3V logic levels for SPI communication.
Q: What are the typical applications for the GD25Q128ESIG? A: The GD25Q128ESIG is used in applications such as firmware storage, boot memory, and other embedded systems where non-volatile storage is needed.
Q: How can I protect the GD25Q128ESIG from accidental writes? A: You can protect the device from accidental writes by using the /WP pin to enable write protection.
Q: How do I select the chip for SPI communication? A: The chip is selected for SPI communication by pulling the /CS pin low.
Q: Can I use multiple GD25Q128ESIG devices in a system? A: Yes, you can use multiple devices in a system by addressing them individually using separate /CS lines.
Q: What is the size of the memory in GD25Q128ESIG? A: The GD25Q128ESIG has a memory size of 128Mb, or 16MB.
Q: What is the clock frequency supported by GD25Q128ESIG? A: The GD25Q128ESIG supports high-speed SPI clock frequencies, typically up to 104MHz.
Q: How do I erase data from GD25Q128ESIG? A: To erase data, you send an erase command through the SPI interface, which will reset or erase specific sectors or the entire memory.
Q: Is there a built-in cache for read/write operations? A: Yes, the GD25Q128ESIG has internal cache for improving the performance of read and write operations.
Q: Can the GD25Q128ESIG store data during power-down? A: Yes, as a non-volatile memory device, the GD25Q128ESIG retains stored data even when power is lost.
Q: What happens if I forget to de-assert /CS after a communication? A: If /CS is not de-asserted properly, the chip may remain in an active state, potentially leading to communication errors.
If you'd like a more in-depth breakdown or clarification on any of these functions or specifications, let me know!