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SH3003

Semtech
Part Number SH3003
Manufacturer Semtech
Description MicroBuddy Support IC for Microcontrollers
Published Apr 19, 2010
Detailed Description POWER MANAGEMENT Description Three components make a complete system: any microcontroller, the SH3003, and a bypass capa...
Datasheet PDF File SH3003 PDF File

SH3003
SH3003


Overview
POWER MANAGEMENT Description Three components make a complete system: any microcontroller, the SH3003, and a bypass capacitor.
This low-cost system would consume very little power and have clock-frequency accuracy of ± 0.
5%.
A fourth component, a 32.
768kHz crystal, raises the clock frequency accuracy to ± 0.
0256% (± 256 ppm).
The SH3003 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 SH3003.
The SH3003 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 non-volatile 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).
A backup power source may also be connected to the SH3003.
The IC can directly accommodate 2/3-cell zinccarbon/alkaline, 2/3-cell mercury, 2/3/4-cell NiCd/NiMH, one cell Li/Li+ batteries, or a super cap.
The programmable SH3003 MicroBuddy® (μBuddy®) provides all mandatory microcontroller support functions: ‹ ‹ ‹ ‹ CPU Supervisor Clock Management System Real-Time Support Auxiliary Functions MicroBuddy® Support IC www.
DataSheet4U.
com for Microcontrollers Features ‹ Highly integrated • IC - 3mm x 3mm x 0.
9mm, 16-lead MLP (QFN) package ‹ CPU Supervisor • Low VDD reset programmable from 2.
3V to 4.
3V • Watchdog timer with programmable time out periods • Both active-high and active-low reset outputs ‹ Clock Management System • Replaces high-frequency (HF) crystal or resonator • Programmable clock output from 32.
768kHz to 16MHz • Speed shift between multiple clock frequencies • Adjustable spectrum spreading for EMI reduction • Directly supports microcontroller STOP function • Deep slee...


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