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參數(shù)資料
| 型號(hào)： | ST7FLCD1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-bit MCU for LCD Monitors with 60 KBytes Flash, 2 KBytes RAM, 2 DDC Ports and Infrared Controller |
| 中文描述： | 8位微控制器的液晶顯示器為60千字節(jié)閃存，2千字節(jié)RAM，2個(gè)DDC的港口和紅外線控制器 |
| 文件頁(yè)數(shù)： | 43/95頁(yè) |
| 文件大?。?/td> | 633K |
| 代理商： | ST7FLCD1 |
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ST7FLCD1
PWM Generator
8
PWM Generator
8.1
Introduction
This PWM on-chip peripheral consists of two blocks, each one with its own 8-bit auto-reload
counter.
The first block (Block A) outputs up to 4 separate PWM signals at the same frequency. The second
block (Block B) outputs up to 2 separate PWM signals at another frequency.
Each PWM output may be enabled or disabled independently of the other. The polarity of each
PWM output may also be independently set.
8.2
Main Features
●
2 distinct programmable frequencies between 31.250 kHz and 8 MHz.
●
Resolution: t
CPU
8.3
Functional Description
The free-running 8-bit counter is fed by the CPU clock and increments on every rising edge of the
clock signal.
When a counter overflow occurs, the counter is automatically reloaded with the contents of the ARR
register.
Each PWMx output signal can be enabled independently using the corresponding OEx bit in the
PWM control register (PWMCR). When this bit is set, the corresponding I/O is configured as an
output push-pull alternate function.
PWM[3:0] all have the same frequency which is controlled by counter period A and the ARRA
register value.
f
PWMA
= f
COUNTERA
/ (256-ARRA)
PWM[5:4] all have the same frequency which is controlled by counter period B and the ARRB
register value.
f
PWMB
= f
COUNTERB
/ (256-ARRB)
When a counter overflow occurs, the PWMx pin level is toggled depending on the corresponding
OPx (output polarity) bit in the PWMCR register. When the counter reaches the value contained in
one of the Duty Cycle registers (DCRIx), the corresponding PWMx pin level is restored.
This DCRIx register can not be accessed directly, it is loaded from the Duty Cycle register (DCRx)
at each overflow of the counter. This double buffering method prevents glitch generation when
changing the duty cycle on the fly.
Note that the reload values will also affect the value and the resolution of the duty cycle of the PWM
output signal. To obtain a signal on a PWMx pin, the contents of the DCRx register must be greater
than or equal to the contents of the ARR register. The maximum available resolution for duty cycle
is 1/(256-ARR).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST7FLCD1_05 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-bit MCU for LCD Monitors with 60 KBytes Flash,2 KBytes RAM, 2 DDC Ports and Infrared Controller |
| ST7FLI15BF1U6 | 功能描述:8位微控制器 -MCU 8-Bit MCU w/ Single Volt Flash 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 |
| ST7FLI15BF1U6TR | 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR 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 |
| ST7FLI19BF1M3TR | 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR 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 |
| ST7FLI19BF1U6TR | 功能描述:8位微控制器 -MCU 8-Bit MCU w/ Single Volt Flash 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 |
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