FC3860A Single-chip 5.8GHz DSRC modem Integrated with RF and MCU 1. Overview 1.1. Introduction FC3860A is a single-chip SoC for electronic toll collection, in which 5.8GHz RF, DSRC modem, and MCU are integrated. The chips provide performance and functions which conform to the Korean DSRC standard, TTAS.KO-06.0025/R1. [Figure 1 FC3860A block diagram] Various peripherals like smart card interface, USB, DAC, ADC, LCD interface, keypad scanner, UART, SPI, IIC, IIS, etc are integrated.