ZHCSMR1C october 2019 – september 2021 UCC5870-Q1
PRODUCTION DATA
Programming of the device is done through the SPI serial communication slave interface by an external MCU. The SPI communication follows a 16-bit protocol, utilizing specific command data frames, and uses an active-low chip select input (nCS) and communicates at rates up to 4MHz. The communication frame starts with the nCS falling edge and ends with nCS rising edge. While nCS is high, the SPI interface is held in reset, and the SDO output is high impedance. The SPI clock idles at 0 (CPOL=0) and clocks the SDI/SDO data (CPHA=1) on the falling edge. The device supports three SPI bus configurations: independent slave configuration, daisy chain configuration, and a new address oriented configuration.