EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 124

• Manufacturer Part Number: EFM32G200F64
• Description: MCU 32BIT 64KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G200F64

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.8 V
• Data Converters: A/D 4x12b, D/A 1x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad
• Processor Series: EFM32G200
• Core: ARM Cortex-M3
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, UART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

13 PRS - Peripheral Reflex System
13.1 Introduction
13.2 Features
13.3 Functional Description
2010-09-06 - d0001_Rev1.00
The Peripheral Reflex System (PRS) system is a network which lets the different peripheral module
communicate directly with each other without involving the CPU. Peripheral modules which send out
Reflex signals are called producers. The PRS routes these reflex signals to consumer peripherals which
apply actions depending on the Reflex signals received. The format for the Reflex signals is not given,
but edge triggers and other functionality can be applied by the PRS.
• 8 configurable interconnect channels
• Software controlled channel output
An overview of the PRS module is shown in Figure 13.1 (p. 125) . The PRS contains 8 interconnect
channels, and each of these can select between all the output Reflex signals offered by the producers.
The consumers can then choose which PRS channel to listen to and perform actions based on the Reflex
signals routed through that channel. The Reflex signals can be both pulse signals and level signals.
Synchronous PRS pulses are one HFPERCLK cycle long, and can either be sent out by a producer (e.g.
ADC conversion complete) or be generated from the edge detector in the PRS channel. Level signals
can have an arbitrary waveform (e.g. Timer PWM output).
0 1 2 3
• Each channel can be connected to any producing peripheral
• Consumers can choose which channel to listen to
• Selectable edge detector (Rising, falling and both edges)
• Configurable level
• Triggered pulses
4
Tim er
DMA
ADC
PRS
PRS
Ch
Ch
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What?
The PRS (Peripheral Reflex System)
allows configurable, fast, and autonomous
communication between the peripherals.
Why?
Events and signals from one peripheral
can be used as input signals or triggers by
other peripherals and ensure timing-critical
operation and reduced software overhead.
How?
Without CPU intervention the peripherals can
send Reflex signals (both pulses and level)
to each other in single- or chained steps. The
peripherals can be set up to perform actions
based on the incoming Reflex signals. This
results in improved system performance and
reduced energy consumption.
Quick Facts
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