參數(shù)資料
型號： ATMEGA1284-PU
廠商： Atmel
文件頁數(shù)： 160/160頁
文件大小： 0K
描述： IC MCU AVR 128K FLASH 40PDIP
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
megaAVR Introduction
標準包裝： 10
系列： AVR® ATmega
核心處理器： AVR
芯體尺寸： 8-位
速度： 20MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 128KB（64K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量： 16K x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 40-DIP（0.600"，15.24mm）
包裝： 管件
配用： ATSTK600-RC05-ND - STK600 ROUTING CARD AVR
99
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Figure 15-5. CTC mode, timing diagram.
An interrupt can be generated each time the counter value reaches the TOP value by using the
OCF0A Flag. If the interrupt is enabled, the interrupt handler routine can be used for updating
the TOP value. However, changing TOP to a value close to BOTTOM when the counter is run-
ning with none or a low prescaler value must be done with care since the CTC mode does not
have the double buffering feature. If the new value written to OCR0A is lower than the current
value of TCNT0, the counter will miss the Compare Match. The counter will then have to count to
its maximum value (0xFF) and wrap around starting at 0x00 before the Compare Match can
occur.
For generating a waveform output in CTC mode, the OC0A output can be set to toggle its logical
level on each Compare Match by setting the Compare Output mode bits to toggle mode
(COM0A1:0 = 1). The OC0A value will not be visible on the port pin unless the data direction for
the pin is set to output. The waveform generated will have a maximum frequency of f
OC0 =
f
clk_I/O/2 when OCR0A is set to zero (0x00). The waveform frequency is defined by the following
equation:
The N variable represents the prescale factor (1, 8, 64, 256, or 1024).
As for the Normal mode of operation, the TOV0 Flag is set in the same timer clock cycle that the
counter counts from MAX to 0x00.
15.7.3
Fast PWM mode
The fast Pulse Width Modulation or fast PWM mode (WGM02:0 = 3 or 7) provides a high fre-
quency PWM waveform generation option. The fast PWM differs from the other PWM option by
its single-slope operation. The counter counts from BOTTOM to TOP then restarts from BOT-
TOM. TOP is defined as 0xFF when WGM2:0 = 3, and OCR0A when WGM2:0 = 7. In non-
inverting Compare Output mode, the Output Compare (OC0x) is cleared on the Compare Match
between TCNT0 and OCR0x, and set at BOTTOM. In inverting Compare Output mode, the out-
put is set on Compare Match and cleared at BOTTOM. Due to the single-slope operation, the
operating frequency of the fast PWM mode can be twice as high as the phase correct PWM
mode that use dual-slope operation. This high frequency makes the fast PWM mode well suited
for power regulation, rectification, and DAC applications. High frequency allows physically small
sized external components (coils, capacitors), and therefore reduces total system cost.
In fast PWM mode, the counter is incremented until the counter value matches the TOP value.
The counter is then cleared at the following timer clock cycle. The timing diagram for the fast
TCNTn
OCn
(Toggle)
OCnx Interrupt Flag Set
1
4
Period
2
3
(COMnx1:0 = 1)
f
OCnx
f
clk_I/O
2 N
1
OCRnx
+
--------------------------------------------------
=
相關(guān)PDF資料
PDF描述
VE-B2M-IY-F3 CONVERTER MOD DC/DC 10V 50W
VE-B2M-IY-F2 CONVERTER MOD DC/DC 10V 50W
ATMEGA3250V-8AU IC AVR MCU 32K 8MHZ 100TQFP
ATMEGA3250-16AU IC AVR MCU 32K 16MHZ 100TQFP
VE-B2L-IY-F3 CONVERTER MOD DC/DC 28V 50W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATMEGA1284P-XPLD 功能描述:開發(fā)板和工具包 - AVR MEGA-1284P Xplained Evaluation kit RoHS:否 制造商:Arduino 產(chǎn)品:Evaluation Boards 工具用于評估:ATMega32U4 核心:AVR 接口類型:I2C, UART, USB 工作電源電壓:6 V to 20 V
ATMEGA1284RFR2-ZF 制造商:Atmel Corporation 功能描述:2.4GHZ 128K SOC 48PIN IND 125C TRAY - Trays 制造商:Atmel Corporation 功能描述:IC MCU 8BIT 128KB FLASH 48VQFN 制造商:Atmel Corporation 功能描述:2.4GHZ 128K SOC 48pin Ind 125C Tray
ATMEGA1284RFR2-ZFR 制造商:Atmel Corporation 功能描述:2.4GHZ 128K SOC 48 PIN IND125C T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU 8BIT 128KB FLASH 48VQFN 制造商:Atmel Corporation 功能描述:2.4GHZ 128K SOC 48 pin Ind125C T&R
ATMEGA1284RFR2-ZU 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC 48PIN TRAY - Trays 制造商:Atmel Corporation 功能描述:IC MCU 8BIT 128KB FLASH 48VQFN 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC 48pin Tray
ATMEGA1284RFR2-ZUR 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC 48PIN T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU 8BIT 128KB FLASH 48VQFN 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC 48pin T&R
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*