收藏本站
120
8161D–AVR–10/09
ATmega48PA/88PA/168PA/328P
The Timer/Counter Overflow Flag (TOV1) is set according to the mode of operation selected by
the WGM13:0 bits. TOV1 can be used for generating a CPU interrupt.
15.6
Input Capture Unit
The Timer/Counter incorporates an Input Capture unit that can capture external events and give
them a time-stamp indicating time of occurrence. The external signal indicating an event, or mul-
tiple events, can be applied via the ICP1 pin or alternatively, via the analog-comparator unit. The
time-stamps can then be used to calculate frequency, duty-cycle, and other features of the sig-
nal applied. Alternatively the time-stamps can be used for creating a log of the events.
The Input Capture unit is illustrated by the block diagram shown in Figure 15-3. The elements of
the block diagram that are not directly a part of the Input Capture unit are gray shaded. The
small “n” in register and bit names indicates the Timer/Counter number.
Figure 15-3. Input Capture Unit Block Diagram
When a change of the logic level (an event) occurs on the Input Capture pin (ICP1), alternatively
on the Analog Comparator output (ACO), and this change confirms to the setting of the edge
detector, a capture will be triggered. When a capture is triggered, the 16-bit value of the counter
(TCNT1) is written to the Input Capture Register (ICR1). The Input Capture Flag (ICF1) is set at
the same system clock as the TCNT1 value is copied into ICR1 Register. If enabled (ICIE1 = 1),
the Input Capture Flag generates an Input Capture interrupt. The ICF1 Flag is automatically
cleared when the interrupt is executed. Alternatively the ICF1 Flag can be cleared by software
by writing a logical one to its I/O bit location.
Reading the 16-bit value in the Input Capture Register (ICR1) is done by first reading the low
byte (ICR1L) and then the high byte (ICR1H). When the low byte is read the high byte is copied
into the high byte temporary register (TEMP). When the CPU reads the ICR1H I/O location it will
access the TEMP Register.
The ICR1 Register can only be written when using a Waveform Generation mode that utilizes
the ICR1 Register for defining the counter’s TOP value. In these cases the Waveform Genera-
ICFn (Int.Req.)
Analog
Comparator
WRITE
ICRn (16-bit Register)
ICRnH (8-bit)
Noise
Canceler
ICPn
Edge
Detector
TEMP (8-bit)
DATA BUS (8-bit)
ICRnL (8-bit)
TCNTn (16-bit Counter)
TCNTnH (8-bit)
TCNTnL (8-bit)
ACIC*
ICNC
ICES
ACO*
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
ATMEGA644P-B15MZ IC MCU 8BIT 64KB FLASH 32VQFN
ATMEGA644V-10PU IC AVR MCU FLASH 64K 40DIP
ATMEGA645V-8MI IC AVR MCU FLASH 64K 1.8V 64QFN
ATMEGA649-16MI IC AVR MCU FLASH 64K 5V 64QFN
ATMEGA649V-8MI IC AVR MCU FLASH 64K 1.8V 64QFN
ATMEGA8515L-8JUR MCU AVR 8KB FLASH 8MHZ 44PLCC
ATMEGA8515L-8PJ IC MCU AVR 8K 5V 8MHZ 40-DIP
ATMEGA8535-16JUR MCU AVR 8K FLASH 16MHZ 44PLCC
相关代理商/技术参数
ATMEGA48PA-MN 功能描述:8位微控制器 -MCU AVR 4KB FL 256B EE 512B SRAM 20MHz 105C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PA-MNR 功能描述:8位微控制器 -MCU AVR 4KB FL 256B EE 512B SRAM 20MHz 105C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PA-MU 功能描述:8位微控制器 -MCU AVR 4KB FLASH 20 MHZ,IND TEMP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PA-MU@SL383 制造商:Atmel 功能描述:MCU 8-bit ATmega AVR RISC 4KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
ATMEGA48PA-MUR 功能描述:8位微控制器 -MCU AVR 4KB FLSH 256B EE 512B SRAM-20MHz IND RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PA-PN 功能描述:8位微控制器 -MCU AVR 4KB FL 256B EE 512B SRAM 20MHz 105C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PA-PU 功能描述:8位微控制器 -MCU AVR 4KB FLASH 20 MHZ,IND TEMP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA48PB-AN 功能描述:AVR AVR? ATmega Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 32-TQFP 制造商:atmel 系列:AVR? ATmega 包装:托盘 零件状态:有效 核心处理器:AVR 核心尺寸:8-位 速度:20MHz 连接性:I2C，SPI，UART/USART 外设:欠压检测/复位，POR，PWM，WDT I/O 数:27 程序存储容量:4KB（2K x 16） 程序存储器类型:闪存 EEPROM 容量:256 x 8 RAM 容量:512 x 8 电压 - 电源（Vcc/Vdd）:1.8 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器类型:内部 工作温度:-40°C ~ 105°C（TA） 封装/外壳:32-TQFP 供应商器件封装:32-TQFP 标准包装:250