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| 型號： | R5F3650NDFB |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 0.50 MM PITCH, LQFP-100 |
| 文件頁數(shù)： | 78/81頁 |
| 文件大小： | 879K |
| 代理商： | R5F3650NDFB |
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96
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
match between OCR0x and TCNT0 when the counter decrements. The PWM frequency for the
output when using phase correct PWM can be calculated by the following equation:
The N variable represents the prescale factor (1, 8, 64, 256, or 1024).
The extreme values for the OCR0A Register represent special cases when generating a PWM
waveform output in the phase correct PWM mode. If the OCR0A is set equal to BOTTOM, the
output will be continuously low and if set equal to MAX the output will be continuously high for
non-inverted PWM mode. For inverted PWM the output will have the opposite logic values.
At the very start of period 2 in Figure 14-7 OCnx has a transition from high to low even though
there is no Compare Match. The point of this transition is to guarantee symmetry around BOT-
TOM. There are two cases that give a transition without Compare Match.
OCRnx changes its value from MAX, like in Figure 14-7. When the OCR0A value is MAX the
OCn pin value is the same as the result of a down-counting Compare Match. To ensure
symmetry around BOTTOM the OCnx value at MAX must correspond to the result of an up-
counting Compare Match.
The timer starts counting from a value higher than the one in OCRnx, and for that reason
misses the Compare Match and hence the OCnx change that would have happened on the
way up.
14.7
Timer/Counter Timing Diagrams
The Timer/Counter is a synchronous design and the timer clock (clk
T0) is therefore shown as a
clock enable signal in the following figures. The figures include information on when interrupt
flags are set. Figure 14-8 contains timing data for basic Timer/Counter operation. The figure
shows the count sequence close to the MAX value in all modes other than phase correct PWM
mode.
Figure 14-8. Timer/Counter Timing Diagram, no Prescaling
Figure 14-9 shows the same timing data, but with the prescaler enabled.
f
OCnxPCPWM
f
clk_I/O
N 510
------------------
=
clk
Tn
(clk
I/O/1)
TOVn
clk
I/O
TCNTn
MAX - 1
MAX
BOTTOM
BOTTOM + 1
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| R5F3650NDFB#U0 | 功能描述:MCU 4KB FLASH 512/16K 100-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M16C/60/65 產(chǎn)品培訓(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標(biāo)準(zhǔn)包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲(chǔ)器容量:384KB（384K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| R5F3650NNFA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
| R5F3650NNFB | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
| R5F3650RDFA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
| R5F3650RDFB | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
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