参数资料
型号: ATMEGA164A-MUR
厂商: Atmel
文件页数: 22/160页
文件大小: 0K
描述: IC MCU AVR 16K 20MHZ 44VQFN
产品培训模块: MCU Product Line Introduction
megaAVR Introduction
标准包装: 4,000
系列: AVR® ATmega
核心处理器: AVR
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 16KB(8K x 16)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-VFQFN 裸露焊盘
包装: 带卷 (TR)
其它名称: ATMEGA164A-MUR-ND
118
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Depending on the mode of operation used, the counter is cleared, incremented, or decremented
at each timer clock (clk
Tn). The clkTn can be generated from an external or internal clock source,
selected by the Clock Select bits (CSn2:0). When no clock source is selected (CSn2:0 = 0) the
timer is stopped. However, the TCNTn value can be accessed by the CPU, independent of
whether clk
Tn is present or not. A CPU write overrides (has priority over) all counter clear or
count operations.
The counting sequence is determined by the setting of the Waveform Generation mode bits
(WGMn3:0) located in the Timer/Counter Control Registers A and B (TCCRnA and TCCRnB).
There are close connections between how the counter behaves (counts) and how waveforms
are generated on the Output Compare outputs OCnx. For more details about advanced counting
sequences and waveform generation, see ”Modes of Operation” on page 124.
The Timer/Counter Overflow Flag (TOVn) is set according to the mode of operation selected by
the WGMn3:0 bits. TOVn can be used for generating a CPU interrupt.
16.7
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 ICPn 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 16-3. 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 16-3. Input Capture unit block diagram.
When a change of the logic level (an event) occurs on the Input Capture pin (ICPn), 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
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*
相关PDF资料
PDF描述
MAX7311AAG+T IC I/O EXPANDER I2C 16B 24SSOP
ST16C554DCJ68-F IC UART FIFO 16B QUAD 68PLCC
XR16V554IL-F IC UART FIFO 16B QUAD 48QFN
XR16L2751IM-F IC UART FIFO 64B DUAL 48TQFP
XR16L2751CM-F IC UART FIFO 64B DUAL 48TQFP
相关代理商/技术参数
参数描述
ATMEGA164A-PU 功能描述:8位微控制器 -MCU AVR 16KB FL 512B EE 1KB SRAM-20 MHz 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
ATMEGA164P 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
ATMEGA164P_07 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
ATMEGA164P_0702 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
ATMEGA164P_08 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash