Details

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BUY DS2432 https://www.utsource.net/itm/p/12607663.html

Parameter	Description
Device Type	1-Wire? EEPROM with SHA-1 Engine and Unique ID
Package	SOIC-8
Operating Voltage	2.8V to 5.5V
Operating Temperature	-40掳C to +85掳C
Memory Size	256-bit (32-byte) EEPROM
Security Features	SHA-1 Engine for secure authentication
Unique ID	64-bit laser-programmed registration number
Data Rate	Up to 16.3 kbps
Standby Current	< 1 渭A
Active Current	< 1 mA

Instructions

1. Power Supply Connection:

   • Connect VDD to a power supply between 2.8V and 5.5V.
   • GND should be connected to the system ground.

2. 1-Wire Bus Connection:

   • Connect the 1-Wire data line (DQ) to the host microcontroller or other 1-Wire master device.
   • Ensure proper pull-up resistor on the 1-Wire bus, typically 4.7k惟 to VDD.

3. Initialization:

   • Before any communication, initialize the 1-Wire bus using the standard reset/presence detect sequence.
   • After successful initialization, issue a Match ROM command followed by the unique 64-bit address of the DS2432 to select it for communication.

4. Memory Access:

   • Use Read Memory and Write Memory commands to access the EEPROM.
   • Data integrity is ensured by writing and reading back the data.

5. SHA-1 Engine Usage:

   • To use the SHA-1 engine for secure operations, prepare the message block in the EEPROM.
   • Execute the SHA-1 command to compute the hash.
   • Retrieve the hash result from the device memory.

6. Error Handling:

   • Monitor the status bits returned by the device after each command execution.
   • Retry failed operations as necessary, ensuring correct timing and protocol adherence.

7. Power Management:

   • The device automatically enters low-power mode when idle.
   • Active mode is entered only during command execution.

8. Programming Tools:

   • Use compatible 1-Wire programming tools or software libraries for easier integration into your application.

(For reference only)