EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 331

• 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

24 VCMP - Voltage Comparator
24.1 Introduction
24.2 Features
2010-09-06 - d0001_Rev1.00
The Voltage Supply Comparator is used to monitor the supply voltage from software. An interrupt can
be generated when the supply falls below or rises above a programmable threshold.
Note
• Voltage supply monitoring
• Scalable V
• Internal 1.25 V bandgap reference
• Low power mode for internal V
• Selectable hysteresis
• Selectable response time
• Asynchronous interrupt generation on selectable edges
• Operational in EM0-EM3
• Comparator output direct on PRS
• Configurable output when inactive to avoid unwanted interrupts
0 1 2 3
• 0 or ±20 mV
• Rising edge
• Falling edge
• Rising and Falling edges
4
Note that VCMP comes in addition to the Power-on Reset and Brown-out Detector
peripherals, that both generate reset signals when the voltage supply is insufficient for
reliable operation. VCMP does not generate reset, only interrupt. Also note that the ADC is
capable of sampling the input voltage supply.
DD
V
GND
in 64 steps selectable as positive comparator input
DD
VCMP
V
V
DD
DD
> X ?
< X ?
DD
and bandgap references
Interrupts
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331
What?
The Voltage Supply Comparator (VCMP)
monitors the input voltage supply and
generates software interrupts on events using
as little as 100 nA.
Why?
The VCMP can be used for simple power
supply monitoring, e.g. for a battery level
indicator.
How?
The scaled power supply is compared to a
programmable reference voltage, and an
interrupt can be generated when the supply
is higher or lower than the reference. The
VCMP can also be duty-cycled by software to
further reduce the energy consumption.
Quick Facts
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