EFM32LG332F256 Energy Micro, EFM32LG332F256 Datasheet - Page 3

• Manufacturer Part Number: EFM32LG332F256
• Description: ARM Microcontrollers - MCU 256KB FL 32KB RAM
• Manufacturer: Energy Micro
• Series: EFM32LG332r

Specifications of EFM32LG332F256

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: EFM32
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 48 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.85 V to 3.8 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFP-64
• Mounting Style: SMD/SMT
• Interface Type: I2C, I2S, SPI, UART, USART
• Length: 10 mm

2 System Summary
2.1 System Introduction
2.1.1 ARM Cortex-M3 Core
2.1.2 Debug Interface (DBG)
2.1.3 Memory System Controller (MSC)
2012-09-11 - EFM32LG332FXX - d0111_Rev1.00
The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combination of
the powerful 32-bit ARM Cortex-M3, innovative low energy techniques, short wake-up time from energy
saving modes, and a wide selection of peripherals, the EFM32LG microcontroller is well suited for any
battery operated application as well as other systems requiring high performance and low-energy con-
sumption. This section gives a short introduction to each of the modules in general terms and also and
shows a summary of the configuration for the EFM32LG332 devices. For a complete feature set and in-
depth information on the modules, the reader is referred to the EFM32LG Reference Manual.
A block diagram of the EFM32LG332 is shown in Figure 2.1 (p. 3) .
Figure 2.1. Block Diagram
The ARM Cortex-M3 includes a 32-bit RISC processor which can achieve as much as 1.25 Dhrystone
MIPS/MHz. A Memory Protection Unit with support for up to 8 memory segments is included, as well
as a Wake-up Interrupt Controller handling interrupts triggered while the CPU is asleep. The EFM32
implementation of the Cortex-M3 is described in detail in EFM32 Cortex-M3 Reference Manual.
This device includes hardware debug support through a 2-pin serial-wire debug interface and an Embed-
ded Trace Module (ETM) for data/instruction tracing. In addition there is also a 1-wire Serial Wire Viewer
pin which can be used to output profiling information, data trace and software-generated messages.
The Memory System Controller (MSC) is the program memory unit of the EFM32LG microcontroller. The
flash memory is readable and writable from both the Cortex-M3 and DMA. The flash memory is divided
Serial Int erfaces
Flash
Program
Mem ory
USB
USART
Low
Energy
UART
ARM Cort ex
UART
I
2
C
RAM
Mem ory
Core and Mem ory
™
-M3 processor
I/O Port s
Ext ernal
Int errupt s
Pin
Reset
Debug
Int erface
w/ ETM
LG332F64/128/256
Preliminary
Pin
Wakeup
General
Purpose
I/O
Peripheral Reflex Syst em
Mem ory
Prot ect ion
Unit
DMA
Cont roller
32-bit bus
Tim ers and Triggers
...the world's most energy friendly microcontrollers
Tim er/
Count er
Low Energy
Tim er
Pulse
Count er
Back-up
RTC
3
Clock Managem ent
High Freq.
Cryst al
Oscillat or
Low Freq.
Cryst al
Oscillat or
LESENSE
Real Tim e
Count er
Wat chdog
Tim er
Ult ra Low Freq.
RC
Oscillat or
High Freq
RC
Oscillat or
Low Freq.
RC
Oscillat or
Analog Int erfaces
Pulse
Count er
ADC
DAC
Energy Managem ent
www.energymicro.com
Brown-out
Det ect or
Volt age
Regulat or
Back-up
Power
Dom ain
Operat ional
Am plifier
Volt age
Com parat or
Power-on
Reset
Securit y
Hardware
AES