DS2431P+W Datasheet/PDFThe DS2431P+W is a unique chip used in a variety of systems for memory storage. It is composed of a one-wire ASIC memory chip, a SHA-1 engine, and a signature verification unit. It is a versatile, cost-effective and secure solution for a wide range of applications in the memory management field.
Application Field
The DS2431P+W is ideal for applications such as secure identification, industrial automation, access control, data storage, and system maintenance in computers and other similar devices. The chip is well suited for use in security systems as its embedded SHA-1 technology ensures data authentication and integrity. It also provides a secure platform for storing valuable information and access privileges.
The DS2431P+W can be used in mining systems, medical equipment, and industrial manufacturing. It is widely applicable to tasks such as recording production data, managing and monitoring patient records, maintaining system integrity, and authenticating hardware components. It is also useful in military and aerospace applications, as it can be used to store data and access codes in flights, drones, and other special purpose devices.
Working Principle
The DS2431P+W works by sending unique serialized signals that contain commands, data, and addresses. It is operated through a single 1-Wire bus. This bus is connected to whatever device the chip is installed in and is used for communication between the system and the chip. To ensure secure transfer of information, the chip uses a SHA-1 hashing algorithm, which verifies the integrity of input data. This data is stored in the chip\'s internal non-volatile memory.
The DS2431P+W can work in two modes of memory addressing. The first mode is the Address-Only mode, where the data and commands are transmitted without any address information. This is ideal for simple read/write operations as it omits the need for address manipulation. The second is the Address-Plus-Data mode, where the data and commands are transmitted along with the address information. This is used for applications that require more robust memory management functions.
The DS2431P+W also features signature verification technology to secure the authenticity of the data stored in the chip. It is designed to generate a secure "message authentication code" (MAC) based on a pre-loaded private key. This code is then compared with the stored value to confirm the data\'s validity. The chip also supports multiple power saving modes, making it suitable for use with batteries, low power circuits, and other limited power supply applications.