DS2810：MAXIM 1-Wire SHA-1认证器数据表

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"DS2810是一款由MAXIM公司推出的1-Wire SHA-1认证器，该器件结合了基于FIPS180-3标准的SHA-1安全哈希算法和224位一次性可编程用户EEPROM，提供了一种安全的身份验证解决方案。其内部的64位ROM唯一标识号（ROMID）在出厂时已编程，并且具有自动写保护功能，以确保数据的安全性。设备可以通过1-Wire总线进行通信，遵循标准的1-Wire协议，ROMID作为多设备1-Wire网络中的节点地址。" 详细说明: DS2810是一款集成度极高的安全芯片，其核心特性是实现基于SHA-1的挑战-响应身份验证机制。SHA-1是一种广泛认可的联邦信息处理标准（FIPS）180-3中定义的加密哈希算法，用于确保数据完整性和身份验证。该芯片内含224位的用户EEPROM，数据一旦写入，就会自动被锁定并防止篡改，确保了存储信息的安全性。每个DS2810器件都有一个独特的64位ROMID，这个标识符在生产过程中就已经预编程好，确保了设备间的唯一性。ROMID在1-Wire网络环境中作为节点的地址，使得在网络中可以区分不同的DS2810设备。 1-Wire总线是一种单线通信协议，允许多个设备通过一根线进行数据交换。DS2810遵循1-Wire协议进行通信，简化了硬件设计，降低了系统复杂性。这种通信方式尤其适合需要大量节点的分布式系统，例如物联网(IoT)应用。为了进一步提高安全性，MAXIM公司还提供了安全且经济的工厂编程服务，预先编程设备数据，包括SHA-1安全数据组件。这使得用户在部署设备前就可以定制化安全设置，减少了现场编程的需求。 DS2810是一款适用于需要安全认证和数据保护的应用，如访问控制、防伪、设备身份验证等场景的高效解决方案。其紧凑的封装、强大的安全特性和简单易用的1-Wire接口使其在各种领域中具有广泛的用途。

DS28E10

1-Wire SHA-1 Authenticator

ABRIDGED DATA SHEET

Detailed Description

The DS28E10 combines a 512-bit SHA-1 engine, security

data, 224 bits of one-time programmable (OTP) EPROM,

and a 64-bit ROM ID in a single chip. Data is transferred

serially through the 1-Wire protocol, which requires only

a single data lead and a ground return. In addition to its

important use as a unique data value in cryptographic

SHA-1 computations, the device’s 64-bit ROM ID can

be used to electronically identify the equipment in which

the DS28E10 is used. The ROM ID also serves as node

address in a multidrop 1-Wire network environment

where multiple devices reside on a common 1-Wire bus

and operate independently of each other.

Overview

The block diagram in Figure 1 shows the relationships

between the major control and memory sections of the

device. The device has six main data components: 64-bit

ROM ID, security data, challenge buffer, 28 bytes of OTP

user EPROM memory, special function registers, and a

512-bit SHA-1 engine. Figure 2 shows the hierarchical

structure of the 1-Wire protocol. The bus master must

first provide one of the seven ROM (network) function

commands: 1) Read ROM, 2) Match ROM, 3) Search

ROM, 4) Skip ROM, 5) Resume (communication), 6)

Overdrive-Skip ROM or 7) Overdrive-Match ROM. Upon

completion of an Overdrive-Skip ROM or Overdrive-

Match ROM command executed at standard speed,

the device enters overdrive mode where all subsequent

communication occurs at a higher speed. The protocol

required for these ROM function commands is described

in Figure 8. After a ROM function command is success-

fully executed, the memory and SHA-1 functions become

accessible and the master can provide any one of the

six available function commands. The protocol for these

commands is described in Figure 6. All data is read and

written least significant bit first.

Pin Configurations

Pin Description

GND

N.C.

TSOC

DS28E10

3 GND

DS28E10

SOT23-3

TOP VIEW

NAME FUNCTION

SOT23 TSOC

1 2 IO 1-Wire Bus Interface. Open drain; requires external pullup resistor.

2 3 V

Supply Pin for Operating Power

3 1 GND Ground Supply for the Device

— 4, 5, 6 N.C. Not Connected

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