The "AT45DB081E-SHN-T" is a product from Microchip Technology, which specializes in microcontrollers, Memory products, and related technologies. This specific model refers to a serial Flash memory chip from the AT45 family, which is often used in applications that require high-speed, reliable data storage.
1. Packaging and Pin Count
Package Type: The "SHN" suffix in the part number refers to the package type, which is typically a SOP (Small Outline Package). The full description of the package type will depend on the precise configuration of the device, but this model typically comes in a 8-pin package for simpler use cases.If your version includes a larger package (e.g., SOIC), there may be more pins and different pin functionalities for each configuration.
2. Pin Function List for AT45DB081E-SHN-T (8-pin version)
The following table describes the pin functions for the 8-pin SOIC package (assuming this package type). These functions are standard for this flash memory part.
Pin Number Pin Name Pin Type Pin Function Description 1 CS Input Chip Select. When low, selects the chip for communication. High to deselect the chip. 2 MOSI Input/Output Master Out Slave In (Serial Data Input). Transfers data to the memory during writes. 3 MISO Output Master In Slave Out (Serial Data Output). Sends data from the memory to the master during reads. 4 SCK Input Serial Clock . Provides the clock signal for synchronous communication. 5 Vcc Power Power supply voltage (typically 2.7V to 3.6V for the AT45 series). 6 GND Ground Ground pin. Connects the ground of the power source to the chip. 7 WP Input Write Protect. When low, write protection is disabled, allowing writes to memory. High to enable write protection. 8 RESET Input Reset pin. Active low; triggers a reset of the chip, returning it to an idle state.3. Circuit Principle Explanation
Flash Memory Operation: The AT45DB081E-SHN-T is a serial Flash memory device with an SPI interface . It operates by receiving data through the SPI pins (MOSI, MISO, SCK) and uses the Chip Select (CS) to indicate when the chip is active for communication. The data can be written to and read from the memory in pages or sectors, depending on the command issued through the SPI interface. The memory uses a non-volatile technology, meaning it retains data even when power is removed.
Voltage and Power: Vcc should be supplied within the range specified (typically 2.7V to 3.6V). GND is used for the ground connection. The chip’s power consumption depends on the mode it operates in (e.g., active, idle, or power-down).
Write Protection: The WP pin allows write protection, which can be used to prevent accidental writes. This pin should be tied high or left unconnected to ensure write protection is enabled, or it can be driven low to disable it and allow writes.
Reset Pin: The RESET pin allows the device to be reset in case of an error or to initialize the device to a known state at power-up.
4. 20 FAQ for AT45DB081E-SHN-T
Here are some frequently asked questions (FAQ) for the AT45DB081E-SHN-T device:
Q1: What is the main function of the AT45DB081E-SHN-T? A1: The AT45DB081E-SHN-T is a serial Flash memory chip used for high-speed data storage in embedded systems.
Q2: What is the maximum operating voltage for the AT45DB081E-SHN-T? A2: The maximum operating voltage for the AT45DB081E-SHN-T is 3.6V.
Q3: What does the WP (Write Protect) pin do? A3: The WP pin enables or disables write protection. When it is high, the chip is write-protected; when low, write operations are allowed.
Q4: What happens when the RESET pin is activated? A4: The RESET pin, when held low, resets the device to its idle state, clearing any ongoing operations.
Q5: How does the CS (Chip Select) pin function? A5: The CS pin activates or deactivates the chip. It must be low for the device to communicate; otherwise, the chip remains inactive.
Q6: Can the AT45DB081E-SHN-T be used in low-power applications? A6: Yes, the AT45DB081E-SHN-T supports low-power modes, including standby and deep power-down, to conserve energy when not in use.
Q7: How many data pins does the AT45DB081E-SHN-T have for communication? A7: The chip uses 4 data pins for SPI communication: CS, MOSI, MISO, and SCK.
Q8: Is the AT45DB081E-SHN-T compatible with all microcontrollers? A8: Yes, the AT45DB081E-SHN-T is compatible with any microcontroller that supports the SPI communication protocol.
Q9: What type of data does the AT45DB081E-SHN-T store? A9: It stores non-volatile data, which means the data remains intact even when the power is turned off.
Q10: What is the typical page size for the AT45DB081E-SHN-T? A10: The typical page size for this device is 528 bytes.
Q11: How is data written to the AT45DB081E-SHN-T? A11: Data is written to the chip via the SPI interface, specifically using the MOSI pin, with write commands sent to specify the memory address.
Q12: Can the AT45DB081E-SHN-T be used for large file storage? A12: It is suitable for storing smaller data files like configuration data, firmware, and other non-volatile storage needs, but not ideal for large file storage.
Q13: How is data erased from the AT45DB081E-SHN-T? A13: Data can be erased in sectors or the entire chip, depending on the command issued through the SPI interface.
Q14: What are the power consumption levels of the AT45DB081E-SHN-T? A14: Power consumption depends on the operational mode. It draws less power in sleep or idle mode and more power during read/write operations.
Q15: Is the AT45DB081E-SHN-T capable of high-speed operations? A15: Yes, it supports SPI clock speeds of up to 66 MHz for fast data transmission.
Q16: How can the AT45DB081E-SHN-T be used for firmware updates? A16: The AT45DB081E-SHN-T can store firmware and be updated by writing new data to its memory cells via the SPI interface.
Q17: What is the minimum voltage requirement for the AT45DB081E-SHN-T to operate? A17: The minimum voltage required for operation is 2.7V.
Q18: Can the AT45DB081E-SHN-T be used for logging sensor data? A18: Yes, the AT45DB081E-SHN-T is suitable for logging data from sensors in embedded systems, where non-volatile storage is needed.
Q19: What are the main advantages of using the AT45DB081E-SHN-T? A19: It offers fast read/write speeds, low power consumption, and reliable non-volatile data storage for embedded applications.
Q20: How do I interface the AT45DB081E-SHN-T with a microcontroller? A20: You can interface it with a microcontroller using the SPI protocol, connecting the MOSI, MISO, SCK, and CS pins appropriately to the microcontroller’s SPI pins.
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