With on-chip power-on reset, VDD monitor, watchdog timer, and clock oscillator, the OTP-EPROM devices are truly stand-alone, system-on-a-chip solutions. User software has complete control of all peripherals, and may individually shut down any or all peripherals for power savings.

Code written for the OTP-EPROM family of processors will run on the Silicon Labs Mixed-Signal ISP Flash microcontrollers, providing a quick, cost-effective way to develop code without requiring special emulator circuitry. The OTP-EPROM processors include Silicon Labs’ 2-Wire C2 Debug and Programming interface, which allows non-intrusive (uses no on-chip resources), full speed, in-circuit debugging using the production MCU installed in the final application. This debug logic supports inspection of memory, viewing and modification of special function registers, setting breakpoints, single stepping, and run and halt commands. All analog and digital peripherals are fully functional while debugging using C2. The two C2 interface pins can be shared with user functions, allowing in-system debugging without occupying package pins.

Each device is specified for 1.8 – 3.6 V operation over the industrial temperature range (–45 to +85 °C). An internal LDO is used to supply the processor core voltage at 1.8 V. The Port I/O and RST pins are tolerant of input signals up to 5 V. The OTP-EPROM are available in RoHS compliant packaging.