Application Note
Intel PXA27x Processor Family Power Requirements
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Introduction
Contents
Intel PXA27x Processor Family Power Requirements
Contents
Tables
Intel PXA27x Processor Family Power Requirements
Contents
Figures
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1.0 Introduction
1.1 Naming Conventions
Intel PXA27x Processor Family Power Requirements
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2.0 Intel PXA27x Processor Power Supply Domains
Table 1. External Power Supply Descriptions
Intel PXA27x Processor Family Power Requirements
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Figure 1. Intel PXA27x Processor Internal and External Power Domains
Intel PXA27x Processor Family Power Requirements
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2.1 Power Domains and System Voltage/Current Requirements
2.1.1 Intel PXA27x Processor Power Supplies
Intel PXA27x Processor Family Power Requirements
Voltage
Table 2. Intel PXA27x Processor Voltage Domains Sheet 1 of
Intel PXA27x Processor Family Power Requirements
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2.1.2 Power Supply Configuration in a Minimal System
Table 2. Intel PXA27x Processor Voltage Domains Sheet 2 of
Intel PXA27x Processor Family Power Requirements
Intel PXA27x Processor Family Power Requirements
2.1.3 Modeling Intel PXA27x processor power consumption
Table 3. Regulators Required to Power the Intel PXA27x Processor
2.1.3.1 Intel PXA27x Processor VCCCORE Supply Current
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2.1.3.2 Supply Current For Each Power Domain
Table 4. Intel PXA27x Processor VCCCORE Supply Current
Intel PXA27x Processor Family Power Requirements
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2.1.4 Default Reset Values
Table 5. Intel PXA27x Processor Supply Current For Each Power Domain
Intel PXA27x Processor Family Power Requirements
Intel PXA27x Processor Family Power Requirements
2.2.1 Main Battery
2.2.2 Backup Battery
2.2 Batteries
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2.2.3 Battery Chargers and Main Power
Table 6. Possible Backup Battery Configurations
Intel PXA27x Processor Family Power Requirements
PXA27x Processor
Figure 2. Typical Battery and External Regulator Configuration
Intel PXA27x Processor Family Power Requirements
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3.0 Intel PXA27x Processor Low Power Operating Modes
Table 7. Intel PXA27x Processor Operating Modes
Intel PXA27x Processor Family Power Requirements
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4.0 Power Controller Interface Signals
Figure 3. Overview of Power Management Operating Modes
Intel PXA27x Processor Family Power Requirements
Table 8. Power Controller Interface Signals
4.1 Power Enable PWREN
4.2 System Power Enable SYSEN / GPIO2
4.3 Power Manager I2C Clock PWRSCL / GPIO3
4.5 System-Level Considerations for I2C
4.4 Power Manager I2C Data PWRSDA / GPIO4
4.6 On, Off, and RESET
4.6.2 User-Initiated Hard Reset Input
Intel PXA27x Processor Family Power Requirements
4.8 Power Manager Capacitor Signals
4.6.3 nRESET Output from PMIC to the Intel PXA27x Processor
4.7 Universal Subscriber Identity Module USIM
Intel PXA27x Processor Family Power Requirements
5.0 Power Mode Sequencing
5.1 Power-On
5.1.1 Cold-Start Power-On and Hardware Reset
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5.1.2 Initial Power Up and Deep Sleep Exit Sequence
Intel PXA27x Processor Family Power Requirements
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5.1.3 Hardware Reset Behavior
Intel PXA27x Processor Family Power Requirements
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Intel PXA27x Processor Family Power Requirements
1. The PMIC asserts nRESET
= power manager powered by VCCBATT
Intel PXA27x Processor Family Power Requirements
Power
= power manager powered by VCCCORE
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5.2 Sleep and Deep Sleep
5.2.1 Sleep Entry and Exit
Intel PXA27x Processor Family Power Requirements
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5.2.2 Deep Sleep Entry and Exit
Intel PXA27x Processor Family Power Requirements
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6.0 Dynamic Voltage Management DVM
6.1 VCCCORE Regulator and Dynamic Voltage Management
Intel PXA27x Processor Family Power Requirements
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6.2 Intel PXA27x Processor Voltage Manager
Intel PXA27x Processor Family Power Requirements
6.4 DVM Sequencing
7.0 Fault Management
6.3 Power Manager I2C Interface
7.1 nVDDFAULT
Intel PXA27x Processor Family Power Requirements
8.0 Power Management Integrated Circuit Requirements
7.2 nBATTFAULT
8.1 General PMIC Characteristics
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8.2 Features of a PMIC
Table 9. General PMIC Characteristics
Intel PXA27x Processor Family Power Requirements
Intel PXA27x Processor Family Power Requirements
8.3 Programmable Voltage Control
8.3.1 DVM Control Register
8.3.2 DVM Control Register
Intel PXA27x Processor Family Power Requirements
8.3.4 Other Aspects of an Integrated Power Controller
9.0 Summary
8.3.3 DVM Control and Status Register
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Intel PXA27x Processor Family Power Requirements