Details

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BUY DS2431+T&R https://www.utsource.net/itm/p/5604557.html
IC EEPROM 1K 1WIRE TO92-3

Parameter	Description
Device Type	1-Wire EEPROM with SHA-1 Engine
Package Type	SOIC-8
Operating Voltage	3.0V to 5.5V
Operating Temperature	-40°C to +85°C
Memory Size	512-bit EEPROM (64 bytes)
Data Retention	100 years at 85°C
Write Endurance	1,000,000 cycles
Communication Protocol	1-Wire
SHA-1 Engine	On-chip secure hash algorithm
Supply Current	1μA (standby), 1mA (active)
Program Time	10ms per 8-byte page

Instructions for Use:

1. Power Supply Connection:

   • Connect VCC to the power supply voltage (3.0V to 5.5V).
   • Connect GND to the system ground.

2. 1-Wire Communication Setup:

   • Connect the 1-Wire data line (DQ) to a digital I/O pin on your microcontroller.
   • Ensure that the 1-Wire data line has a pull-up resistor (typically 4.7kΩ).

3. Initialization:

   • Initialize the 1-Wire bus by sending a reset pulse from the microcontroller.
   • The DS2431+T&R will respond with a presence pulse.

4. ROM Command Execution:

   • Execute ROM commands such as Match ROM or Skip ROM to address specific devices on the 1-Wire bus.

5. Function Command Execution:

   • Send function commands like Read Memory, Write Scratchpad, or Copy Scratchpad to interact with the EEPROM and SHA-1 engine.

6. Data Reading/Writing:

   • For reading, use the Read Memory command followed by sequential reads.
   • For writing, first write data to the scratchpad using the Write Scratchpad command, then execute the Copy Scratchpad command to transfer data to EEPROM.

7. Error Checking:

   • Implement error checking mechanisms such as CRC checks for data integrity.

8. Secure Hash Calculation:

   • Utilize the on-chip SHA-1 engine for generating secure hashes of data stored in EEPROM.

9. Handling Multiple Devices:

   • If multiple DS2431+T&R devices are on the same 1-Wire bus, use unique ROM addresses to communicate with each device individually.

10. Power Management:

    • In applications where low power consumption is critical, ensure that the device enters standby mode when not actively communicating.

(For reference only)