...the world's most energy friendly microcontrollers
fields in TIMERn_CTRL. The reload value is 0 in up-count and up/down-count mode and TOP in down-
count mode.
The RUNNING bit in TIMERn_STATUS indicates if the Timer is running or not. If the SYNC bit in
TIMERn_CTRL is set, the Timer is started/stopped/reloaded (external pin or PRS) when any of the other
timers are started/stopped/reloaded.
The DIR bit in TIMERn_STATUS indicates the counting direction of the Timer at any given time. The
counter value can be read or written by software through the CNT field in TIMERn_CNT. In Up/Down-
Count mode the count direction will be set to up if the CNT value is written by software.
Figure 19.2. TIMER Hardware Timer/Counter Control
Cou n t e r
(Controlled by TIMERn_CTRL)
RISEA
FALLA
Start
Cou n t e r
Stop
Reload& Start
Com pa r e /Ca pt u r e ch a n n e l 0
(Controlled by TIMERn_CC0_CTRL)
INSEL
ICEDGE
TIMn_CC0
PRS channels
Filter
Input
Capture 0
PRSSEL
FILT
19.3.1.3 Clock Source
The counter can be clocked from several sources, which are all synchronized with the peripheral clock
(HFPERCLK). See Figure 19.3 (p. 247) .
Figure 19.3. TIMER Clock Selection
Com pa r e /Ca pt u r e ch a n n e l 1
(Controlled by TIMERn_CC1_CTRL)
Cou n t e r
(Controlled by TIMERn_CTRL)
HFPERCLK TIMERn
INSEL
PRESC
Prescaler
CLKSEL
Counter
ICEDGE
TIMn_CC1
PRS channels
Filter
Input
Capture 1
PRSSEL
FILT
19.3.1.3.1 Peripheral Clock (HFPERCLK)
The peripheral clock (HFPERCLK) can be used as a source with a configurable prescale factor of
2^PRESC, where PRESC is an integer between 0 and 10, which is set in PRESC in TIMERn_CTRL.
The prescaler is stopped and reset when the timer is stopped.
19.3.1.3.2 Compare/ Capture Channel 1 Input
The Timer can also be clocked by positive and/or negative edges on the Compare/Capture channel 1
input. This input can either come from the TIMn_CC1 pin or one of the PRS channels. The input signal
2011-04-12 - d0001_Rev1.10
247
www.energymicro.com
相关PDF资料
EFM32GG-STK3700 KIT STARTER GIANT GECKO
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
相关代理商/技术参数
EFM32GG230F1024 功能描述:ARM微控制器 - MCU 1024KB FL 128KB RAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT
EFM32GG230F1024G-E-QFN64R 功能描述:IC MCU 32BIT 1MB FLASH 64QFN 制造商:silicon labs 系列:Giant Gecko 包装:剪切带(CT) 零件状态:在售 核心处理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:48MHz 连接性:I2C,IrDA,智能卡,SPI,UART/USART 外设:欠压检测/复位,DMA,POR,PWM,WDT I/O 数:56 程序存储容量:1MB(1M x 8) 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:128K x 8 电压 - 电源(Vcc/Vdd):1.98 V ~ 3.8 V 数据转换器:A/D 8x12b,D/A 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C(TA) 封装/外壳:64-VFQFN 裸露焊盘 供应商器件封装:64-QFN(9x9) 标准包装:1
EFM32GG230F1024-QFN64 制造商:Energy Micro AS 功能描述:GIANT GECKO MCU - Cut TR (SOS) 制造商:Energy Micro 功能描述:GIANT GECKO MCU 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 1MB FLASH 64QFN
EFM32GG230F1024-QFN64T 制造商:Energy Micro AS 功能描述:GIANT GECKO MCU - Trays
EFM32GG230F1024-QFN64-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 1MB FLASH 64QFN
EFM32-GG230F1024-SK 制造商:Energy Micro AS 功能描述:GIANT GECKO SAMPLE KIT - Bulk
EFM32GG230F1024-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 1MB FLASH 64QFN
EFM32GG230F512 功能描述:ARM微控制器 - MCU 512KB FL 128KB RAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT