September 2013

Doc ID 022842 Rev 2

1/13

AN4057

Application note

SPC560Pxx, SPC56APxx power up HW guideline

INTRODUCTION

This application note is addressed to system hardware designers using

to ensure a reliable microcontroller power up sequence also in the condition of an offset

The use of the SPC560Pxx/SPC56APxx internal voltage regulator requires a specific design

ST approved ballasts with the recommended supporting network described in the latest

revision of the device data sheet (for further details see Section Appendix A: Additional

information). It is important to respect the power on sequence conditions, ensuring a

monotonic supply ramp starting at ground level and respecting the min and max slew rate

This application note covers:

■

Recommended power on sequence conditions

■

microcontroller power up

■

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