The ADS1210 is a 24-bit delta-sigma analog-to-digital converter. This application bulletin provides examples of how to interface the ADS1210 with an Intel 8xC51 microcontroller. The converter can be operated with the serial data clock SCLK, generated by itself or provided externally, such as by an 8xC51. The ADS1210 supports SPI (Serial Peripheral Interface) interfacing and SSI (Synchronized Serial Interface) interfacing. This bulletin focuses on interfacing the ADS1210 to an 8xC51, which provides the synchronous SCLK signal. The schematic and 8xC51 assembly code are provided for both of the interface protocols.