參數資料
型號： PIC16F872T-I/SO
廠商： Microchip Technology
文件頁數： 154/167頁
文件大小： 0K
描述： IC MCU FLASH 2KX14 EE 28SOIC
產品培訓模塊： Asynchronous Stimulus
標準包裝： 1,600
系列： PIC® 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 20MHz
連通性： I²C，SPI
外圍設備： 欠壓檢測/復位，POR，PWM，WDT
輸入/輸出數： 22
程序存儲器容量： 3.5KB（2K x 14）
程序存儲器類型： 閃存
EEPROM 大小： 64 x 8
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 5.5 V
數據轉換器： A/D 5x10b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
包裝： 帶卷 (TR)
87
8048C–AVR–02/12
ATtiny43U
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
PWM mode is shown in Figure 12-6 on page 87. The TCNTn value is in the timing diagram
shown as a histogram for illustrating the single-slope operation. The diagram includes non-
inverted and inverted PWM outputs. The small horizontal line marks on the TCNTn slopes repre-
sent Compare Matches between OCRnx and TCNTn.
Figure 12-6. Fast PWM Mode, Timing Diagram
The Timer/Counter Overflow Flag (TOVn) is set each time the counter reaches TOP. If the inter-
rupt is enabled, the interrupt handler routine can be used for updating the compare value.
In fast PWM mode, the compare unit allows generation of PWM waveforms on the OCnx pins.
Setting the COMnx[1:0] bits to two will produce a non-inverted PWM and an inverted PWM out-
put can be generated by setting the COMnx[1:0] to three: Setting the COMnA[1:0] bits to one
allowes the OCnA pin to toggle on Compare Matches if the WGMn2 bit is set. This option is not
available for the OCnB pin (See Table 12-3 on page 92). The actual OCnx value will only be vis-
ible on the port pin if the data direction for the port pin is set as output. The PWM waveform is
generated by setting (or clearing) the OCnx Register at the Compare Match between OCRnx
and TCNTn, and clearing (or setting) the OCnx Register at the timer clock cycle the counter is
cleared (changes from TOP to BOTTOM).
The PWM frequency for the output can be calculated by the following equation:
The N variable represents the prescale factor (1, 8, 64, 256, or 1024).
TCNTn
OCRnx Update and
TOVn Interrupt Flag Set
1
Period
2
3
OCn
(COMnx[1:0] = 2)
(COMnx[1:0] = 3)
OCRnx Interrupt Flag Set
4
5
6
7
f
OCnxPWM
f
clk_I/O
N 256
------------------
=
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相關代理商/技術參數
參數描述
PIC16F873-04/SO 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F873-04/SO 制造商:Microchip Technology Inc 功能描述:8BIT FLASH MCU SMD 16F873 SOIC28
PIC16F873-04/SP 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F873-04/SP 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 16F873 SDIL28
PIC16F873-04E/SO 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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