參數(shù)資料
型號(hào)： MC68HC705V8CFU
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP64
封裝： QFP-64
文件頁數(shù)： 169/172頁
文件大?。?/td> 890K
代理商： MC68HC705V8CFU
SECTION 13: PULSE WIDTH MODULATOR
MOTOROLA
Page 85
MC68HC705V8 Specification Rev. 2.1
SECTION 13
PULSE WIDTH MODULATOR
The pulse width modulator (PWM) system has one 6-bit channel (PWMA). Preceding the
6-bit (
÷64) PWM are two programmable prescalers.The PWM frequency is selected by
choosing the desired divide option from the programmable prescalers. Note that the PWM
clock input is fosc, which is twice the bus frequency. The PWM frequency will be fosc/
(PSA+PSB+64) where PSA and PSB are the values selected by the A and B prescaler and
64 comes from the 6-bit modulus counter. See Table 13-1 for precise values. E is the
internal bus frequency fixed to half of the external oscillator frequency.
Figure 13-1:
PWM Block Diagram
13.1
FUNCTIONAL DESCRIPTION
The PWM is capable of generating signals from 0% to 100% duty cycle. A $00 in the PWM
Data Register yields an “l(fā)ow” output (0%), but a $3F yields a duty of 63/64. To achieve the
100% duty (“high” output), the polarity control bit is set to zero while the data register has
$00 in it.
When not in use, the PWM system can be shut off to save power by clearing the clock rate
select bits PSA0 and PSA1 in PWMCR.
Writes to the PWM data register are buffered and can therefore be performed at any time
without affecting the output signal. When the PWM subsystem is enabled, a write to the
PWM Control Register will become effective immediately.
6-BIT COUNTER
(
÷64)
PWM DATA
REGISTER
MODULUS &
COMPARATOR
PWM
PIN LOGIC
PWMA
÷1, ÷8, ÷16
fosc
PSA0
PSA1
PWM CONTROL REGISTER and BUFFER
HC05
DATA
BUS
POL
PWM DATA
BUFFER
SCLK
÷1-16
PSB2
PSB3
PSB0
PSB1
RCLK
Integer divide
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料
PDF描述
MC68HC705V8B 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
MC68HC705V8FN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC705V8CFN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC705X4CDW 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
MC68HC05X4CDW 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC706P6ACDW 制造商:Motorola Inc 功能描述:
MC68HC708MP16CFU 制造商:MAJOR 功能描述:
MC68HC711D3CFBE2 制造商:Freescale Semiconductor 功能描述:
MC68HC711D3CFN2 功能描述:IC MCU 2MHZ 4K OTP 44-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HC711D3CFNE2 功能描述:8位微控制器 -MCU 8B OTP 192RAM 2 MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
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(hào)，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(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*