收藏本站
...the world's most energy friendly microcontrollers
5.2.3.1 Arbitration
The Bus Matrix uses a round-robin arbitration algorithm which enables high throughput and low latency
while starvation of simultaneous accesses to the same bus slave are eliminated. Round-robin does not
assign a fixed priority to each bus master. The arbiter does not insert any bus wait-states.
5.2.3.2 Access Performance
The Bus Matrix is a multi-layer energy optimized AMBA AHB compliant bus with an internal bandwidth
of 4x a single AHB interface.
The Bus Matrix accepts new transfers to be initiated by each master in each cycle without inserting any
wait-states. However, the slaves may insert wait-states depending on their internal throughput and the
clock frequency.
The Cortex-M3 and the DMA Controller, and the peripherals (not peripherals in the low frequency clock
domain) run on clocks which can be prescaled separately. When accessing a peripheral which runs on
a frequency equal to or faster than the HFCORECLK, the number of wait cycles per access, in addition
to master arbitration, is given by:
Memory Wait Cycles with Clock Equal or Faster than the HFCORECLK
N cycles = 2 + N slave cycles
(5.3)
where N slave cycles is the wait cycles introduced by the slave.
When accessing a peripheral which runs on a slower clock than the HFCORECLK, wait cycles are
introduced to allow the transfer to complete on the peripheral clock. The number of wait cycles per
access, in addition to master arbitration, is given by:
Memory Wait Cycles with Clock Slower than the CPU
N cycles = (2 + N slave cycles ) x f HFCORECLK /f HFPERCLK
(5.4)
where N slave cycles is the wait cycles introduced by the slave.
Clocks and prescaling are described in more detail in Chapter 11 (p. 126) .
5.3 Access to Low Energy Peripherals (Asynchronous Registers)
5.3.1 Introduction
The Low Energy Peripherals are capable of running when the high frequency oscillator and core system
is powered off, i.e. in energy mode EM2 and in some cases also EM3. This enables the peripherals to
perform tasks while the system energy consumption is minimal.
The Low Energy Peripherals are:
?
?
?
?
?
?
?
?
Liquid Crystal Display driver - LCD
Low Energy Timer - LETIMER
Low Energy UART - LEUART
Pulse Counter - PCNT
Real Time Counter - RTC
Watchdog - WDOG
Low Energy Sensor Interface - LESENSE
Backup RTC - BURTC
2012-04-24 - Giant Gecko Family - d0053_Rev0.96
20
www.energymicro.com
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
EFM32LG-DK3650 KIT DEV EFM32 LEOPARD GECKO
EK-K7-KC705-CES-G-J KINTEX-7 FPGA KC705 EVAL KIT
EK-S6-SP601-G KIT EVAL SPARTAN 6 SP601
EK-S6-SP605-G KIT EVAL SPARTAN 6 SP605
EK-V6-ML631-G-J VIRTEX-6 HXT FPGA ML631 EVAL KIT
EK-V7-VC707-CES-G VIRTEX-7 VC707 EVAL KIT
EK-Z7-ZC702-CES-G ZYNQ-7000 EPP ZC702 EVAL KIT
EL1848IYZ-T7 IC LED DRIVR WHITE BCKLGT 8-MSOP
相关代理商/技术参数
EFM32G-MCP3550 功能描述:子卡和OEM板 Gecko DK MCU Plugin board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
EFM32-GXXX-PTB 功能描述:BOARD PROTOTYPING FOR EFM32 RoHS:是 类别:编程器，开发系统 >> 配件 系列:EFM®32 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 标准包装:1 系列:- 附件类型:USB 至 1-Wire? RJ11 适配器 适用于相关产品:1-Wire? 设备 产品目录页面:1429 (CN2011-ZH PDF)
EFM32HG108F32G-A-QFN24 功能描述:ARM? Cortex?-M0+ Happy Gecko Microcontroller IC 32-Bit 25MHz 32KB (32K x 8) FLASH 24-QFN (5x5) 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:有效 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:32KB（32K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:4K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:- 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490
EFM32HG108F64G-A-QFN24 功能描述:ARM? Cortex?-M0+ Happy Gecko Microcontroller IC 32-Bit 25MHz 64KB (64K x 8) FLASH 24-QFN (5x5) 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:有效 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:8K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:- 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490
EFM32HG108F64G-B-QFN24 功能描述:IC MCU 32BIT 64KB FLASH 24QFN 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:在售 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:8K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:- 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490
EFM32HG110F32G-A-QFN24 功能描述:ARM? Cortex?-M0+ Happy Gecko Microcontroller IC 32-Bit 25MHz 32KB (32K x 8) FLASH 24-QFN (5x5) 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:有效 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:32KB（32K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:4K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:A/D 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490
EFM32HG110F64G-A-QFN24 功能描述:ARM? Cortex?-M0+ Happy Gecko Microcontroller IC 32-Bit 25MHz 64KB (64K x 8) FLASH 24-QFN (5x5) 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:有效 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:8K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:A/D 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490
EFM32HG110F64G-B-QFN24 功能描述:ARM? Cortex?-M0+ Happy Gecko Microcontroller IC 32-Bit 25MHz 64KB (64K x 8) FLASH 24-QFN (5x5) 制造商:silicon labs 系列:Happy Gecko 包装:托盘 零件状态:在售 核心处理器:ARM? Cortex?-M0+ 核心尺寸:32-位 速度:25MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:17 程序存储容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:8K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:A/D 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:24-VQFN 裸露焊盘 供应商器件封装:24-QFN（5x5） 标准包装:490