SH3002

SH3002 MicroBuddy™ Reset Management and Clock Management Support IC for Microcontrollers SYSTEM MANAGEMENT Description The programmable SH3002 MicroBuddy™ (µBuddy™) provides mandatory microcontroller support functions: ♦ CPU Supervisor ♦ Clock Management System ♦ Auxiliary functions Three components make a complete system: any microcontroller, the SH3002, and a bypass capacitor. This low-cost system would consume very little power and have clock-frequency accuracy of ± 0.5%. The SH3002 can operate completely stand-alone, or under control of the microcontroller. A single-wire interface handles both bi-directional communications and the interrupt / wake-up signal from the SH3002. The SH3002 stores all configuration, calibration, parameters, and status information in a 36-byte bank of control registers. On reset, most of these are reloaded with defaults from the factory-set nonvolatile memory. The microcontroller can change any settings on the fly. If some of the settings must remain fixed, a comprehensive set of write-protect bits is provided for several related groups of registers (with both permanent write-inhibit and lock/unlock capabilities). Features ♦ ♦ Highly integrated IC - 3 mm x 3 mm x 0.9 mm 16-lead MLP (QFN) package CPU Supervisor - Low VDD reset programmable from 2.3 V to 4.3 V - Both active-high and active-low reset outputs Clock Management System - Replaces high-frequency (HF) crystal or resonator - Programmable clock output from 32.768 kHz to 16 MHz - Speed shift between multiple clock frequencies - Adjustable spectrum spreading for EMI reduction - Directly supports microcontroller STOP function - Deep sleep with instantaneous auto-wakeup Operates from 2.3 V to 5.5 V - Ideal for battery-operated devices IDD