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Lizard Labs Peripheral Reflex System

Lizard Labs Peripheral Reflex System. EFM32 Training Module. Peripheral Reflex System. Z. Z. Z. Z. Brain. Z. Z. Sensor nerve. Motor nerve. Spine. Peripheral Reflex System. Z. Z. Z. Z. ARM Cortex-M3 processor. Z. Z. Peripheral reflex system. Timer. ADC.

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Lizard Labs Peripheral Reflex System

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  1. Lizard LabsPeripheral Reflex System EFM32 Training Module

  2. Peripheral Reflex System Z Z Z Z Brain Z Z Sensor nerve Motor nerve Spine

  3. Peripheral Reflex System Z Z Z Z ARMCortex-M3 processor Z Z Peripheralreflex system Timer ADC

  4. Reflexes versus Interrupts ARMCortex-M3 processor CPU IRQ Energy Efficient Peripherals Timer ADC

  5. Reflexes versus Interrupts ARMCortex-M3 processor UNKNOWNDELAY CPU IRQ Energy Efficient Peripherals Timer ADC

  6. Reflexes versus Interrupts ARMCortex-M3 processor HIGHCURRENT CONSUMPTION UNKNOWNDELAY CPU IRQ Energy Efficient Peripherals Timer ADC

  7. Reflexes versus Interrupts Z Z Z ARMCortex-M3 processor Energy Efficient Peripherals PRS Timer ADC

  8. Peripheral Reflex System Z Z Z ARM Cortex-M3 processor PRS Producers PRS Consumers Timer GPIO ADC DAC PeripheralReflexSystem

  9. Peripheral Reflex System Z Z Z ARM Cortex-M3 processor PRS Producers PRS Consumers Timer GPIO ADC DAC PeripheralReflexSystem

  10. Example: ADC samples to RAM ADC ADC Peripheral Reflex System Timer Start conversion Overflow Analog input DMA Request Direct Memory Access RAM Sample done Sample Data Sample Data • SW Examples: • AN0021 Analog to Digital Converter • AN0013 Direct Memory Access

  11. Example: Pulse width measurement Timer Reset & Start Analog input + Peripheral Reflex System ACMP Capture Overflow Reference - Reference Analog input Reflex signal TIMER Count value Capture Reset & Start Capture Reset & Start • SW Example: AN0025 Peripheral Reflex System

  12. Peripherals With PRS Support • Reflex Producers • ACMP • ADC • DAC • GPIO • RTC • BURTC • TIMER • LETIMER • LESENSE • UART • USART • USB • VCMP • Reflex Consumers • ADC • DAC • TIMER • LESENSE • UART • USART • PCNT Reflex signals

  13. PRS and Energy Modes CPU and Memory Clock Management Energy Management ARM Cortex-M3 processor High Freq Crystal Osc High Freq RC Osc Voltage Regulator Embedded Trace Macrocell Voltage Comparator ARM Cortex-M processor Memory Protection Unit MemoryProtection Unit Low Freq Crystal Osc Low Freq RC Osc Power-on Reset Brown-out Detector Flash Program Memory RAM Memory Debug Interface DMA Ultra Low Freq RC Osc Auxiliary RC Osc Auxiliary RC Osc Back-up Power Domain 32-bit bus Peripheral Reflex System Serial Interfaces I/O Ports Timers and Triggers Analog Modules Security Low Energy Sensor IF USART External Bus Interface Timer/Counter ADC DAC UART AES Accelerator TFT Driver Low Energy Timer Real Time Counter LCD Controller Operational Amplifier Low Energy UART I2C External Interrupt General Purpose I/O Pulse Counter Watchdog Timer Analog Comparator Pin Reset GPIO Wake-up USB Backup RTC Available down to: EM0 Run Mode EM1 Sleep EM2 Deep Sleep EM3 Stop Mode EM4 Shutoff Mode

  14. PRS API in emlib • Use emlib API functions to configure PRS: • 1) Configure producer as normal • 2) Configure PRS channel • 3) Configure consumer

  15. PRS on external pins • PRS channels 0-3 can be routed to external pins • Useful when debugging autonomous peripherals Timer ADC

  16. Summary • PRS advantages • Energy Efficient • Autonomous • Fast • Predictable latency • Highly configurable

  17. www.silabs.com

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