AM437x Low Power Suspend Mode with LPDDR2

(ACTIVE) TIDEP0024

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Description

This low power mode implementation realizes processor power consumption less than 0.1 mW while keeping LPDDR2 memory in self refresh consuming ~ 1.6 mW. The system solution is comprised of AM437x Sitara processor, LPDDR2 memory and TPS65218 power management IC and optimized for new low power mode along with support for legacy low power modes. The processor power is minimized by turning off all the processor power supplies except RTC power supply. System power state transitions including power supply control can be performed by single interface signal (PMIC_PWR_EN signal) with PMIC register programming.

Features
  • Suspend to RAM with the lowest system power mode
    • AM437x in RTC-only mode
    • TPS65218 in suspend state
    • LPDDR2 in self refresh
  • System can resume back to the state it was before suspending
  • RTC-only suspend power consumption
    • AM43x + TPS65218: < 0.1 mW
    • Typical 2Gb LPDDR2: 1.6 mW
  • Suspend Events by:
    • By programming RTC registers
    • By setting up the RTC alarm
  • Resume Events:
    • RTC alarm goes off
    • PMIC push button or AC power detection
  • Resume Time
    • < 300 msec hardware latency
    • < 1 sec for software to resume to previous state (depending on application use case)
  • This design is tested and includes schematics, BOM, and design guide.

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TI Devices (9)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AM4376  Sitara Processor: ARM Cortex-A9, Secure Boot, PRU-ICSS  ARM Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4377  Sitara Processor: ARM Cortex-A9, Security, EtherCAT  ARM Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4378  Sitara Processor: ARM Cortex-A9, Secure Boot, 3D, PRU  ARM Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4379  Sitara Processor: ARM Cortex-A9, Security, EtherCAT, 3D  ARM Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G07  Single Buffer/Driver With Open-Drain Output  Logic  Sample & Buy View Design Kits & Evaluation Modules
TPD1E10B06  Single-Channel ESD in 0402 Package With 10pF Capacitance and 6V Breakdown  Circuit Protection  Sample & Buy View Design Kits & Evaluation Modules
TPS63010  High Efficient Single Inductor Buck-Boost Converter with 2-A Switches  Buck/Boost, Inverting or Split-Rail  Sample & Buy View Design Kits & Evaluation Modules
TPS65218  Power Management IC (PMIC) for ARM Cortex-A8/A9 SoCs and FPGA  Power Management  Sample & Buy View Design Kits & Evaluation Modules
TPS781  150mA, LDO Reg, Ultralow-Power, Iq 1uA w/ Pin-Selectable, Dual-Level Output Volt  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

More literature (1)
*This is not an TI official document.
Title Date Type
Sitara ARM Processors Wiki 17 Oct 2012 Wiki*
User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 56 03 Oct 2014 139
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 211 03 Oct 2014 53
PDF 103 03 Oct 2014 55
PDF 68 03 Oct 2014 85


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