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EFM32LG232 Schematic ( PDF Datasheet ) - Silicon Laboratories

Teilenummer EFM32LG232
Beschreibung microcontrollers
Hersteller Silicon Laboratories
Logo Silicon Laboratories Logo 




Gesamt 30 Seiten
EFM32LG232 Datasheet, Funktion
...the world's most energy friendly microcontrollers
EFM32LG232 DATASHEET
F256/F128/F64
ARM Cortex-M3 CPU platform
• High Performance 32-bit processor @ up to 48 MHz
• Memory Protection Unit
Flexible Energy Management System
• 20 nA @ 3 V Shutoff Mode
• 0.4 µA @ 3 V Shutoff Mode with RTC
• 0.65 µA @ 3 V Stop Mode, including Power-on Reset, Brown-out
Detector, RAM and CPU retention
• 0.95 µA @ 3 V Deep Sleep Mode, including RTC with 32.768 kHz
oscillator, Power-on Reset, Brown-out Detector, RAM and CPU
retention
• 63 µA/MHz @ 3 V Sleep Mode
• 211 µA/MHz @ 3 V Run Mode, with code executed from flash
256/128/64 KB Flash
32 KB RAM
53 General Purpose I/O pins
• Configurable push-pull, open-drain, pull-up/down, input filter, drive
strength
• Configurable peripheral I/O locations
• 16 asynchronous external interrupts
• Output state retention and wake-up from Shutoff Mode
12 Channel DMA Controller
12 Channel Peripheral Reflex System (PRS) for autonomous in-
ter-peripheral signaling
Hardware AES with 128/256-bit keys in 54/75 cycles
Timers/Counters
• 4× 16-bit Timer/Counter
• 4×3 Compare/Capture/PWM channels
• Dead-Time Insertion on TIMER0
• 16-bit Low Energy Timer
• 1× 24-bit Real-Time Counter and 1× 32-bit Real-Time Counter
• 3× 16/8-bit Pulse Counter
• Watchdog Timer with dedicated RC oscillator @ 50 nA
Backup Power Domain
• RTC and retention registers in a separate power domain, avail-
able in all energy modes
• Operation from backup battery when main power drains out
Communication interfaces
• 3× Universal Synchronous/Asynchronous Receiv-
er/Transmitter
• UART/SPI/SmartCard (ISO 7816)/IrDA/I2S
• 2× Low Energy UART
• Autonomous operation with DMA in Deep Sleep
Mode
• 2× I2C Interface with SMBus support
• Address recognition in Stop Mode
Ultra low power precision analog peripherals
• 12-bit 1 Msamples/s Analog to Digital Converter
• 8 single ended channels/4 differential channels
• On-chip temperature sensor
• 12-bit 500 ksamples/s Digital to Analog Converter
• 2× Analog Comparator
• Capacitive sensing with up to 16 inputs
• 3× Operational Amplifier
• 6.1 MHz GBW, Rail-to-rail, Programmable Gain
• Supply Voltage Comparator
Low Energy Sensor Interface (LESENSE)
• Autonomous sensor monitoring in Deep Sleep Mode
• Wide range of sensors supported, including LC sen-
sors and capacitive buttons
Ultra efficient Power-on Reset and Brown-Out Detec-
tor
Debug Interface
• 2-pin Serial Wire Debug interface
• 1-pin Serial Wire Viewer
• Embedded Trace Module v3.5 (ETM)
Pre-Programmed UART Bootloader
Temperature range -40 to 85 ºC
Single power supply 1.98 to 3.8 V
TQFP64 package
32-bit ARM Cortex-M0+, Cortex-M3 and Cortex-M4 microcontrollers for:
• Energy, gas, water and smart metering
• Health and fitness applications
• Smart accessories
• Alarm and security systems
• Industrial and home automation






EFM32LG232 Datasheet, Funktion
...the world's most energy friendly microcontrollers
2.1.19 Analog Comparator (ACMP)
The Analog Comparator is used to compare the voltage of two analog inputs, with a digital output indi-
cating which input voltage is higher. Inputs can either be one of the selectable internal references or from
external pins. Response time and thereby also the current consumption can be configured by altering
the current supply to the comparator.
2.1.20 Voltage Comparator (VCMP)
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. Response time and
thereby also the current consumption can be configured by altering the current supply to the comparator.
2.1.21 Analog to Digital Converter (ADC)
The ADC is a Successive Approximation Register (SAR) architecture, with a resolution of up to 12 bits
at up to one million samples per second. The integrated input mux can select inputs from 8 external
pins and 6 internal signals.
2.1.22 Digital to Analog Converter (DAC)
The Digital to Analog Converter (DAC) can convert a digital value to an analog output voltage. The DAC
is fully differential rail-to-rail, with 12-bit resolution. It has two single ended output buffers which can be
combined into one differential output. The DAC may be used for a number of different applications such
as sensor interfaces or sound output.
2.1.23 Operational Amplifier (OPAMP)
The EFM32LG232 features 3 Operational Amplifiers. The Operational Amplifier is a versatile general
purpose amplifier with rail-to-rail differential input and rail-to-rail single ended output. The input can be set
to pin, DAC or OPAMP, whereas the output can be pin, OPAMP or ADC. The current is programmable
and the OPAMP has various internal configurations such as unity gain, programmable gain using internal
resistors etc.
2.1.24 Low Energy Sensor Interface (LESENSE)
The Low Energy Sensor Interface (LESENSETM), is a highly configurable sensor interface with support
for up to 16 individually configurable sensors. By controlling the analog comparators and DAC, LESENSE
is capable of supporting a wide range of sensors and measurement schemes, and can for instance mea-
sure LC sensors, resistive sensors and capacitive sensors. LESENSE also includes a programmable
FSM which enables simple processing of measurement results without CPU intervention. LESENSE is
available in energy mode EM2, in addition to EM0 and EM1, making it ideal for sensor monitoring in
applications with a strict energy budget.
2.1.25 Backup Power Domain
The backup power domain is a separate power domain containing a Backup Real Time Counter, BURTC,
and a set of retention registers, available in all energy modes. This power domain can be configured to
automatically change power source to a backup battery when the main power drains out. The backup
power domain enables the EFM32LG232 to keep track of time and retain data, even if the main power
source should drain out.
2.1.26 Advanced Encryption Standard Accelerator (AES)
The AES accelerator performs AES encryption and decryption with 128-bit or 256-bit keys. Encrypting or
decrypting one 128-bit data block takes 52 HFCORECLK cycles with 128-bit keys and 75 HFCORECLK
cycles with 256-bit keys. The AES module is an AHB slave which enables efficient access to the data
2014-06-13 - EFM32LG232FXX - d0106_Rev1.30
6
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EFM32LG232 pdf, datenblatt
...the world's most energy friendly microcontrollers
Symbol
Parameter
IEM3 EM3 current
IEM4 EM4 current
1Using backup RTC.
Condition
EM2 current with RTC
prescaled to 1 Hz, 32.768
kHz LFRCO, VDD= 3.0 V,
TAMB=85°C
VDD= 3.0 V, TAMB=25°C
VDD= 3.0 V, TAMB=85°C
VDD= 3.0 V, TAMB=25°C
VDD= 3.0 V, TAMB=85°C
3.4.1 EM1 Current Consumption
Min
Typ Max Unit
3.01 4.01 µA
0.65 1.3 µA
2.65 4.0 µA
0.02 0.055 µA
0.44 0.9 µA
Figure 3.1. EM1 Current consumption with all peripheral clocks disabled and HFXO running at
48MHz
3.15
3.15
3.10
3.10
3.05
3.00
- 40°C
- 15°C
5°C
2.95
25°C
45°C
65°C
85°C
2.90
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
3.05
3.00
2.95
2.90
–4 0
2.0V
2.2V
2.4V
2.6V
2.8V
3.0V
3.2V
3.4V
3.6V
3.8V
–15 5 25 45 65 85
Tem perature [°C]
Figure 3.2. EM1 Current consumption with all peripheral clocks disabled and HFRCO running
at 28MHz
1.85
1.80
1.75
1.70
- 40°C
- 15°C
5°C
1.65
25°C
45°C
65°C
85°C
1.60
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
Vdd [V]
1.85
1.80
1.75
1.70
1.65
1.60
–4 0
2.0V
2.2V
2.4V
2.6V
2.8V
3.0V
3.2V
3.4V
3.6V
3.8V
–15 5 25 45 65 85
Tem perature [°C]
2014-06-13 - EFM32LG232FXX - d0106_Rev1.30
12
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