rej06b0642_h8300hslpap| Application Note
APPLICATION NOTE
H8/300H Super Low Power Series
Waiting for Stabilization of Sub-Oscillator with Minimum Supply Current
Introduction
This application note describes two methods of waiting for the oscillation of the sub-oscillator to be stabilized with minimized supply current: one uses a timer and the other uses the time constant of the R-C network. In the method using a timer, the H8/38099 waits in power-down mode until oscillation of the sub-oscillator becomes stable. The module standby function is used during power-down mode. To check the oscillation of the sub-oscillator, timer C is activated with supply of a subclock and made to produce 1second toggle output on port pin 92.
Target Device
H8/38099
Contents
1. 2. 3. 4. 5. 6. 7. Specifications .................................................................................................................................... 2 Oscillation Stabilization Time and Reset Timing............................................................................... 2 Description of Functions Used .......................................................................................................... 4 Principles of Operation.................................................................................................................... 10 Description of Software................................................................................................................... 11 Flowcharts....................................................................................................................................... 21 Link Address Specifications ............................................................................................................ 23
REJ06B0642-0100/Rev.1.00
March 2007
Page 1 of 25
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