Details

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BUY AT45DB041B-TC https://www.utsource.net/itm/p/8153739.html
IC FLASH 4M SPI 20MHZ 28TSOP

Parameter	Description	Value
Device Type	Serial Data Flash	AT45DB041B-TC
Memory Size	Total memory size	4 Mbits (512 Kbytes)
Organization	Memory organization	2 x 256 pages of 264 bytes each
Page Size	Page size	264 Bytes
Sector Size	Sector size	8 KB
Supply Voltage (Vcc)	Operating supply voltage	2.7 V to 3.6 V
Interface	Interface type	SPI
Clock Frequency	Maximum clock frequency	66 MHz
Operating Temperature	Operating temperature range	-40°C to +85°C
Standby Current	Standby current	1 μA
Active Current	Active current	20 mA
Programming Time	Typical page program time	4 ms
Erase Time	Typical sector erase time	30 ms
Package Type	Package	TSOP II-48

Instructions for Use

1. Power Supply and Grounding:

   • Ensure the device is powered within the specified supply voltage range (2.7 V to 3.6 V).
   • Properly connect the ground (GND) pin.

2. SPI Interface Connection:

   • Connect the SPI pins (MOSI, MISO, SCK, and CS) to your microcontroller or host system.
   • Ensure signal integrity by minimizing trace lengths and using appropriate decoupling capacitors.

3. Initialization:

   • Power up the device and initialize the SPI interface by setting the chip select (CS) pin high initially.
   • Send the "Release from Deep-Power-Down" command if the device was in deep-power-down mode.

4. Reading Data:

   • Select the device by pulling the CS pin low.
   • Send the read command followed by the address of the data to be read.
   • Clock in the data bits using the SCK line.
   • Deselect the device by pulling the CS pin high after reading.

5. Writing Data:

   • Ensure the write protection feature is disabled if necessary.
   • Select the device by pulling the CS pin low.
   • Send the write enable command.
   • Send the page program command followed by the address and data to be written.
   • Wait for the write cycle to complete before deselecting the device.

6. Erasing Data:

   • Send the sector/block erase command followed by the address of the sector/block to be erased.
   • Wait for the erase cycle to complete.

7. Power Management:

   • Enter deep-power-down mode to reduce power consumption when the device is not in use.
   • Exit this mode with the "Release from Deep-Power-Down" command when needed.

8. Error Handling:

   • Monitor the status register for any errors during operations like writing or erasing.
   • Implement retry mechanisms as necessary for robust operation.

9. Handling Multiple Devices:

   • If multiple devices are connected on the same SPI bus, ensure proper management of the CS lines to avoid conflicts.

For detailed specifications and additional instructions, refer to the official datasheet provided by Atmel/Microchip.

(For reference only)