- 您现在的位置：买卖IC网 > PDF目录239729 > IV80C52EXXX-25:RD (ATMEL CORP) 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | IV80C52EXXX-25:RD |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | 1.40 MM HEIGHT, VQFP-44 |
| 文件页数： | 22/134页 |
| 文件大小： | 3805K |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页
118
8011Q–AVR–02/2013
ATmega164P/324P/644P
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.
13.6
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 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 13-3. 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 13-3. 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
(TCNTn) is written to the Input Capture Register (ICRn). The Input Capture Flag (ICFn) is set at
the same system clock as the TCNTn value is copied into ICRn Register. If enabled (ICIEn = 1),
the Input Capture Flag generates an Input Capture interrupt. The ICFn Flag is automatically
cleared when the interrupt is executed. Alternatively the ICFn 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 (ICRn) is done by first reading the low
byte (ICRnL) and then the high byte (ICRnH). When the low byte is read the high byte is copied
into the high byte temporary register (TEMP). When the CPU reads the ICRnH I/O location it will
access the TEMP Register.
The ICRn Register can only be written when using a Waveform Generation mode that utilizes
the ICRn 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*
相关PDF资料 |
PDF描述 |
|---|---|
| IDT75T43100S66BS | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA304 |
| IDT79RC64T575250DPI | 64-BIT, 250 MHz, RISC PROCESSOR, PQFP208 |
| IDT79R3081-40DL8 | 32-BIT, 40 MHz, RISC PROCESSOR, PQCC84 |
| ICS84325EM | 250 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS84427BM | 625 MHz, OTHER CLOCK GENERATOR, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IV-811MX | 制造商:Digital ID View 功能描述:8 CH H.264 DVR USB REMOTENO HDD 制造商:DIGITAL IDVIEW 功能描述:8 CH H.264 DVR USB REMOTE NO HDD |
| IV-811Z-960H-1000 | 制造商:Digital ID View 功能描述:8-Channel 960H i-Cloud Series DVR with 1TB HDD |
| IV-811Z-960H-500 | 制造商:Digital ID View 功能描述:8-Channel 960H i-Cloud Series DVR with 500GB HDD 制造商:DIGITAL IDVIEW 功能描述:8-CHNL ICLOUD 960H DVR 500GB HDD HDMI OUT |
| IV-811ZAECO-1000 | 制造商:Digital ID View 功能描述:8 Ch H.264 DVR D1 1Tbb Dvd |
| IV-811ZAECO-500 | 制造商:Digital ID View 功能描述:8 Ch H.264 DVR D1 500GB Dvd |
发布紧急采购，3分钟左右您将得到回复。