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SH3000

Semtech
Part Number SH3000
Manufacturer Semtech
Description Low-Power Programmable Multifunction Support IC for Microcontrollers
Published Apr 19, 2010
Detailed Description SH3000 MicroBuddy™ www.DataSheet4U.com Low-Power Programmable Multifunction Support IC for Microcontrollers SYSTEM MANAG...
Datasheet PDF File SH3000 PDF File

SH3000
SH3000

Overview
SH3000 MicroBuddy™ www.
DataSheet4U.
com Low-Power Programmable Multifunction Support IC for Microcontrollers SYSTEM MANAGEMENT Description The programmable SH3000 MicroBuddy™ (µBuddy™) provides all mandatory microcontroller support functions: ♦ CPU Supervisor ♦ Clock Management System ♦ Real Time Support ♦ Auxiliary functions Three components make a complete system: any microcontroller, the SH3000, 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.
768 kHz watch crystal, raises the clock frequency accuracy to ± 0.
0256% (± 256 ppm).
The SH3000 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 SH3000.
The SH3000 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 One-Time-Programmable (OTP) 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 SH3000.
The IC can directly accommodate 2/3-cell zinccarbon/alkaline, 2/3-cell mercury, 2/3/4-cell NiCd/NiMH, 1cell Li/Li+ batteries, or a super cap.
Features ♦ ♦ Highly integrated IC - 3mm x 3mm x 0.
9 mm 16-lead MLP (QFN) package CPU Supervisor - Low VDD reset programmable from 2.
3 V to 4.
3 V - Watchdog timer with programmable timeout periods - Both active-high and active-low reset outputs Clock Management System - Replaces High-Frequency (HF) crystal or resonator - Programmable clock output from 32 kHz to 16 MHz - Speed shift between multiple clock frequencies - Adjustable spectrum spreading for EMI reducti...


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