收藏本站
...the world's most energy friendly microcontrollers
? Comparator output direct on PRS
? Comparator output on GPIO through alternate functionality
? Output inversion available
23.3 Functional Description
An overview of the ACMP is shown in Figure 23.1 (p. 323) .
Figure 23.1. ACMP Overview
POSSEL
ACMPn_CH0
ACMPn_CH1
ACMPn_CH2
ACMPn_CH3
ACMPn_CH4
ACMPn_CH5
000
-
111
EN
Warm -up
counter
ACMPACT
Warm up interrupt
ACMPn_CH6
ACMPn_CH7
1
0
INACTVAL
Edge interrupt
ACMPOUT
Output to PRS
0000
-
1011
BIASPROG
HALFBIAS
FULLBIAS
HYSTSEL
GPIOINV
Output to GPIO
Read/Write registers
Read only registers
NEGSEL
V DD_SCALED
VDDLEVEL
Scaler
V DD
LPREF
2.5 V
1.25 V
The comparator has two analog inputs, one positive and one negative. When the comparator is active,
the output indicates which of the two input voltages is higher. When the voltage on the positive input is
higher than the voltage on the negative input, the digital output is high and vice versa.
The output of the comparator can be read in the ACMPOUT bit in ACMPn_STATUS. It is possible to
switch inputs while the comparator is enabled, but all other configuration should only be changed while
the comparator is disabled.
23.3.1 Warm-up Time
The analog comparator is enabled by setting the EN bit in ACMPn_CTRL. When this bit is set, the
comparator must stabilize before becoming active and the outputs can be used. This time period is called
the warm-up time. The warm-up time is a configurable number of peripheral clock (HFPERCLK) cycles,
set in WARMTIME, which should be set to at least 10 μs but lengthens to up to 1ms if LPREF is enabled.
The ACMP should always start in active mode and then enable the LPREF after warm-up time. When
the comparator is enabled and warmed up, the ACMPACT bit in ACMPn_STATUS will indicate that the
comparator is active. The output value when the comparator is inactive is set to the value in INACTVAL
in ACMPn_CTRL (see Figure 23.1 (p. 323) ).
An edge interrupt will be generated after the warm-up time if edge interrupt is enabled and the value set
in INACTVAL is different from ACMPOUT after warm-up.
One should wait until the warm-up period is over before entering EM2 or EM3, otherwise no comparator
interrupts will be detected. EM1 can still be entered during warm-up. After the warm-up period is
completed, interrupts will be detected in EM2 and EM3.
2011-04-12 - d0001_Rev1.10
323
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
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