USB-8451 全速 I2C/SPI 接口器件 外设接口设备

【产品详情】

NI USB 8451（部件号：779553-50、779553-01、192317D-02和192317D-02L）是一款总线供电的全速I²C/SPI接口设备。 该器件可用作与外设接口设备、系统管理总线和集成电路 （I2C） 的连接和通信方式。USB 8451 是一种便携式通信解决方案，适用于集成电路和消费电子产品。该接口设备配备 8 条数字 I/O 线。八条DIO线中的每一条都可以单独编程，用作静态数字输入或数字输出线。这些通用数字线路可用于各种应用，例如 I2C 设备配置或切换 LED。静态DIO线也可用于监测或控制数字信号。数字输入线的所有样本和数字输出线的更新均由软件定时。NI 8451 软件 是 使用 设备 随 附 的 软件 CD 进行 的 安装 。

与PCI接口不同，该接口器件可用于I2C/SPI器件附近，从而减少L2C总线长度和其他与噪声相关的问题。NI USB 8451 是 一个 自 给 自 足 的 设备， 不需要 外部 电源。USB接口提供GND和+5 V电源，为其内部电路供电。USB 8451 National Instruments 为每个 SPI、DIO 和 SPI CS 信号提供针对过流、过压和欠压情况的集成保护。有四种 SPI 模式和用于自定义 I2C 和 SPi 事务的高级 API。该 NI 接口 设备 随 附 一个 USB B 系列 插座 和 两个 用于 I/O 连接器 的 16 位 螺丝 端子 插头 接头。它的最大 I2C 时钟速率为 250 kHz，最大 SPI 时钟速率为 12 MHz。

NI 设备重 3 盎司，物理尺寸为 2.50 x 3.35 x 0.91 英寸（不含连接器），尺寸为 3.22 x 3.35 x 0.91 英寸（带连接器）。它的推荐工作温度范围为 0 °C 至 45 °C，存储温度范围为 40 °C 至 85 °C，非冷凝工作和存储湿度分别为 10% 至 90% RH 和 5% 至 90% RH。

USB-8451 全速 I2C/SPI 接口器件 外设接口设备

【英文介绍】

NI USB 8451 (Part number: 779553-50, 779553-01, 192317D-02 and 192317D-02L) is a bus-powered full-speed I²C/SPI interface device. The device can be used for connection and communication with peripheral interface devices, system management buses and integrated circuits (I2C). USB 8451 is a portable communication solution for integrated circuits and consumer electronics. The interface device is equipped with eight digital I/O lines. Each of the eight DIO lines can be individually programmed to be used as a static digital input or digital output line. These universal digital lines can be used for a variety of applications, such as I2C device configuration or switching leds. Static DIO lines can also be used to monitor or control digital signals. All samples of the digital input line and updates of the digital output line are timed by the software. The NI 8451 software is installed using the software CD that comes with the device.

Unlike PCI interfaces, this interface device can be used near I2C/SPI devices, reducing L2C bus length and other noise-related issues. The NI USB 8451 is a self-feeding device that does not require an external power supply. The USB interface provides GND and +5 V power to power its internal circuits. USB 8451 National Instruments provides integrated protection against overcurrent, overvoltage, and undervoltage for every SPI, DIO, and SPI CS signal. There are four SPI modes and advanced apis for custom I2C and SPi transactions. The NI interface device comes with a USB B-series socket and two 16-bit screw terminal plug adaptors for I/O connectors. It has a maximum I2C clock rate of 250 kHz and a maximum SPI clock rate of 12 MHz.

The NI device weighs 3 ounces and has physical dimensions of 2.50 x 3.35 x 0.91 inches (without connectors) and dimensions of 3.22 x 3.35 x 0.91 inches (with connectors). It has a recommended operating temperature range of 0 °C to 45 °C, storage temperature range of 40 °C to 85 °C, non-condensing operation and storage humidity of 10% to 90% RH and 5% to 90% RH, respectively.

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