The AT45DB161E-SHD-T is a product from Microchip Technology Inc. It is a 16 Mbit (2 M x 8) Flash Memory device, specifically designed for high-performance applications requiring fast data read and write capabilities. Below, I'll break down the requested details of the pin functions, packaging specifications, and frequently asked questions.
1. Pin Function Specifications and Circuit Principle
Pinout Overview (for 8-pin SOIC package)The AT45DB161E-SHD-T comes in a variety of packages, including the 8-pin SOIC package. Here's a detailed explanation of its pinout.
Pin # Pin Name Pin Function Description 1 CS Chip Select. This pin is used to enable or disable communication with the chip. 2 DO Data Output. This is used for sending data out of the memory chip. 3 WP Write Protect. When this pin is low, it prevents writing to the memory. 4 VCC Supply Voltage. This is the Power supply pin for the device. 5 GND Ground. This is the reference ground pin. 6 CLK Clock . This pin provides the clock signal for serial communication. 7 DI Data Input. This is the pin where data is written into the memory. 8 HOLD Hold. This pin is used to pause the clock in serial communication, effectively freezing the memory’s operation until the pin is released. Pinout for 8-pin SOIC PackageIn the 8-pin SOIC package, the pins are arranged as follows:
| 1 | 2 | 3 | 4 | ----|------|------|------|------|---- | CS | DO | WP | VCC | ----|------|------|------|------|---- | 5 | 6 | 7 | 8 | ----|------|------|------|------|---- | GND | CLK | DI | HOLD |2. Packaging
The AT45DB161E-SHD-T is available in the 8-pin SOIC package, where the pin count is 8 pins. The device is intended for surface-mount applications and has a relatively small footprint.
3. Detailed Pin Function List
The following is a detailed explanation of each pin in the 8-pin SOIC package:
Pin Number Pin Name Description 1 CS Chip Select: This pin must be pulled low to select the device for communication. If high, the device is deselected and will not respond to any signals. 2 DO Data Output: Used for transmitting data from the device to the external system during read operations. 3 WP Write Protect: If this pin is low, the memory can be written to. If high, write operations are disabled, protecting the memory from accidental writes. 4 VCC Supply Voltage: This is the power pin for the device. It needs to be connected to the power supply voltage for the chip to operate (typically 2.7V to 3.6V). 5 GND Ground: This is the reference ground for the chip. It must be connected to the system ground. 6 CLK Clock: The clock pin provides the timing signals for synchronous communication with the device. The speed of the clock defines the data transfer rate. 7 DI Data Input: Used for sending data to the device during write operations. 8 HOLD Hold: Used to temporarily pause the clock signal without resetting the device. This allows the device to maintain its current state while other operations are performed.4. FAQ for AT45DB161E-SHD-T
Frequently Asked Questions:1. What is the operating voltage for the AT45DB161E-SHD-T?
The operating voltage for the AT45DB161E-SHD-T is between 2.7V and 3.6V.2. What is the maximum clock frequency for the AT45DB161E-SHD-T?
The maximum clock frequency supported by the AT45DB161E-SHD-T is up to 66 MHz.3. How do I select the AT45DB161E-SHD-T for communication?
You must pull the CS (Chip Select) pin low to select the device for communication.**4. What does the *WP (Write Protect)* pin do?**
The WP pin, when pulled high, disables write operations to the memory, providing protection against accidental data loss.5. How is data input written to the AT45DB161E-SHD-T?
Data is written through the DI (Data Input) pin during a write operation, synchronized with the clock signal (CLK).**6. What does the *HOLD* pin do?**
The HOLD pin can pause the clock signal without resetting the device, allowing for temporary suspension of communication.**7. Can I use the *AT45DB161E-SHD-T* in high-speed applications?**
Yes, the device supports high-speed operation with a maximum clock frequency of 66 MHz, suitable for high-speed read and write operations.**8. What is the purpose of the *DO (Data Output)* pin?**
The DO pin is used to output data during a read operation from the device.9. How do I power the AT45DB161E-SHD-T?
Power the device by connecting VCC to the power supply and GND to ground.**10. How is the *AT45DB161E-SHD-T* initialized for use?**
The device initializes when the CS pin is asserted (low), and communication is ready to begin once the clock signal (CLK) is provided.11. How can I disable write operations to protect the memory?
Set the WP pin high to disable write operations.12. What is the typical current consumption of the AT45DB161E-SHD-T?
The typical current consumption is 1.5 mA during read operations and up to 30 mA during programming operations.13. Can I interface the AT45DB161E-SHD-T with other microcontrollers?
Yes, the device uses SPI (Serial Peripheral Interface) for communication, which is widely supported by microcontrollers.14. What is the write endurance of the AT45DB161E-SHD-T?
The typical write endurance for the AT45DB161E-SHD-T is 100,000 program/erase cycles.15. What is the read latency of the AT45DB161E-SHD-T?
The read latency is typically 10 clock cycles.16. How can I erase a sector of memory?
Memory sectors can be erased by sending the appropriate command through the SPI interface.17. Is the AT45DB161E-SHD-T capable of handling multiple simultaneous accesses?
No, the AT45DB161E-SHD-T supports only single-access operations at a time.**18. What happens if the *CS* pin is not pulled low?**
If CS is not pulled low, the device will not respond to commands, and no communication will occur.**19. What is the difference between *HOLD* and WP pins?**
HOLD is used to pause the clock, while WP is used to disable write operations to protect the memory from being written to.20. Can I use the AT45DB161E-SHD-T in automotive applications?
Yes, the AT45DB161E-SHD-T is suitable for automotive applications, as it operates over a wide temperature range of -40°C to +85°C.If you need any more details or adjustments, feel free to ask!
