The new MAXQ3210’s capabilities make it unique in both the MAXQ family and the embedded microcontroller market. The MAXQ3210 integrates EEPROM code and data storage, a piezoelectric horn driver, and a 9V regulator into a low-pin-count package. A high-performance 16-bit RISC core makes the device both fast and power-friendly. Based on the MAXQ10 core, the MAXQ3210 differs from other MAXQ microcontrollers as it has 8-bit accumulators rather than 16-bit accumulators. The MAXQ3210 can be used in many applications where a few I/O pins and some smart control are required. This application note describes some ideal environmental-monitoring applications.