S912XHZ512F1VAG Datasheet, PDF (725/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

Chapter 20
Voltage Regulator (S12VREG3V3V5)
Revision History
Version Revision Effective
Number Date
Date
V 5.03
09 Sep
2004
09 Sep
2004
V 5.04
24 Nov
2004
24 Nov
2004
V 5.05
1 Apr
2005
1 Apr
2005
Author
Description of Changes
Corrected Typos.
Updated Section 20.4.7 & Table 20-6 to be easier understood. .
Corrected Section regarding the non usage of VSSR. For info on
VSSR see Section 20.2.1.
20.1 Introduction
Module VREG_3V3 is a dual output voltage regulator that provides two separate 2.5V (typical) supplies
differing in the amount of current that can be sourced. The regulator input voltage range is from 3.3V up
to 5V (typical).
20.1.1 Features
Module VREG_3V3 includes these distinctive features:
• Two parallel, linear voltage regulators
— Bandgap reference
• Low-voltage detect (LVD) with low-voltage interrupt (LVI)
• Power-on reset (POR)
• Low-voltage reset (LVR)
• Autonomous periodical interrupt (API)
20.1.2 Modes of Operation
There are three modes VREG_3V3 can operate in:
1. Full performance mode (FPM) (MCU is not in stop mode)
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
725