USB-8452, 3.3 MHz I2C, 50 MHz SPI I2C/SPI Interface Device
781964-02 - NI (National Instruments)
The NI USB‑8452 is a master interface for connecting to and communicating with inter-integrated circuit (I2C) and serial peripheral interface (SPI) devices. With plug‑and‑play USB connectivity, the USB‑8452 is a bus-powered, portable solution to communicate with consumer electronics and integrated circuits. It also includes eight general-purpose digital I/O lines for a variety of applications, such as configuring the address of I2C devices, toggling LEDs, or strobing convert and data ready lines common to analog converter chips. You can physically place the USB‑8452 more closely than PCI interfaces to I2C/SPI devices, which reduces I2C bus length and minimizes noise problems. Additionally, the interface provides +5 V and GND to power circuits with no external power supply.
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I²C/SPI Interface Device
The I²C/SPI Interface Device is a master or slave interface for inter-integrated circuit (I²C), or master interface for serial parallel interface (SPI) devices. With plug-and-play USB connectivity, the I²C/SPI Interface Device is a portable solution to communicate with consumer electronics and integrated circuits. The I²C/SPI Interface Device can be physically located more closely to I²C/SPI devices than PCI interfaces, reducing I²C bus length and minimizing noise problems. The I²C/SPI Interface Device supports I²C rates up to 250 kHz and SPI rates up to 50 MHz, and it also includes eight general-purpose digital I/O lines for a variety of applications, such as configuring the address of I²C devices or toggling LEDs.
