- 您現在的位置：買賣IC網 > PDF目錄371051 > MC68HC11K4CFU2 (MOTOROLA INC) Technical Summary 8-Bit Microcontroller PDF資料下載
參數資料
| 型號： | MC68HC11K4CFU2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Technical Summary 8-Bit Microcontroller |
| 中文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數： | 74/80頁 |
| 文件大小： | 420K |
| 代理商： | MC68HC11K4CFU2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁當前第74頁第75頁第76頁第77頁第78頁第79頁第80頁
MOTOROLA
74
M68HC11 K Series
MC68HC11TS/D
12 Pulse-Width Modulation Timer
M68HC11 K-series MCUs contains a PWM timer that is composed of a four-channel 8-bit modulator.
Each of the modulators can create independent continuous waveforms with software-selectable duty
rates from 0% to 100%.
The PWM provides up to four pulse-width modulated waveforms on port H pins. Each channel has its
own counter. Pairs of counters can be concatenated to create 16-bit PWM outputs based on 16-bit
counts. Three clock sources (A, B, and S) and a flexible clock select scheme give the PWM system a
wide range of frequencies.
Four control registers configure the PWM outputs —PWCLK, PWPOL, PWSCAL, and PWEN. The PW-
CLK register selects the prescale value for the PWM clock sources and enables the 16-bit PWM func-
tions. The PWPOL register determines each channel's polarity and selects the clock source for each
channel. The PWSCAL register derives a user-scaled clock based on the A clock source, and the
PWEN register enables the PWM channels.
Each channel has a separate 8-bit counter, period register, and duty cycle register. The period and duty
cycle registers are double buffered so that if they are changed while the channel is enabled, the change
does not take effect until the counter rolls over or the channel is disabled. A new period or duty cycle
can be forced into effect immediately by writing to the period or duty cycle register and then writing to
the counter.
With channels configured for 8-bit mode and E = 4 MHz, PWM signals of 40 kHz (1% duty cycle reso-
lution) to less than 10 Hz (approximately 0.4% duty cycle resolution) can be produced. By configuring
the channels for 16-bit mode with E = 4 MHz, PWM periods greater than one minute are possible.
In 16-bit mode, duty cycle resolution of almost 15 parts per million can be achieved (at a PWM frequen-
cy of about 60 Hz). In the same system, a PWM frequency of 1 kHz corresponds to a duty cycle reso-
lution of 0.025%.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC11K4CFU4 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN2 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN3 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN4 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4VFN4 | Technical Summary 8-Bit Microcontroller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC11K4CFU3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4CFU4 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Technical Summary 8-Bit Microcontroller |
| MC68HC11K4FN1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| MC68HC11K4MFN2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4MFN3 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Technical Summary 8-Bit Microcontroller |
發布緊急采購，3分鐘左右您將得到回復。