EFM32G890F64 Energy Micro, EFM32G890F64 Datasheet - Page 39

• Manufacturer Part Number: EFM32G890F64
• Description: MCU 32BIT 64KB FLASH 112-BGA
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G890F64

• 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, LCD, POR, PWM, WDT
• Number Of I /o: 90
• 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 8x12b, D/A 2x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LFBGA
• Processor Series: EFM32G890
• 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: 90
• Number Of Timers: 3
• 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

8.3 Block Diagram
8.4 Functional Description
2010-09-06 - d0001_Rev1.00
• Each channel has a programmable transfer length
• A DMA channel can be triggered by any of several sources:
• Programmable mapping between channel number and peripherals - any DMA channel can be
• Interrupts upon transfer completion
• Data transfer to/from LEUART in EM2 is supported by the DMA, providing extremely low energy
An overview of the DMA and the modules it interacts with is shown in Figure 8.1 (p. 39) .
Figure 8.1. DMA Block Diagram
The DMA Controller consists of four main parts:
• An APB block allowing software to configure the DMA controller
• An AHB block allowing the DMA to read and write the DMA descriptors and the source and destination
• A DMA control block controlling the operation of the DMA, including request/acknowledge signals for
• A channel select block routing the right peripheral request to each DMA channel
The DMA Controller is highly flexible. It is capable of transferring data between peripherals and memory
without involvement from the processor core. This can be used to increase system performance by
• Scatter-gather (using the primary descriptor to configure the alternate descriptor)
• Communication modules (USART, UART, LEUART)
• Timers (TIMER)
• Analog modules (DAC, ADC)
• Software
triggered by any of the available sources
consumption while performing UART communications
data for the DMA transfers
the connected peripherals
Peripheral
Peripheral
AHB to
bridge
APB
Channel
select
Configuration
Configuration
control
REQ/
ACK
APB block
registers
m em ory
m apped
APB
DMA control block
...the world's most energy friendly microcontrollers
Cortex-M3
DMA Core
39
AHB
AHB-Lite
interface
m aster
AHB block
DMA data
transfer
Interrupts
Channel
done
Error
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