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參數資料
| 型號： | W79E532A40PN |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數： | 43/77頁 |
| 文件大小： | 523K |
| 代理商： | W79E532A40PN |
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W79E532/W79L532
Publication Release Date: November 21, 2005
- 43 -
Revision A5
11.3 Pulse Width Modulated Outputs (PWM)
There are six pulse width modulated output channels to generate pulses of programmable length and
interval. The repetition frequency is defined by an 8-bit prescaler PWMP, which supplies the clock for
the counter. The prescaler and counter are common to both PWM channels. The 8-bit counter counts
modular 255 (0 ~ 254). The value of the 8-bit counter compared to the contents of six registers:
PWM0, PWM1, PWM2, PWM3 and PWM4. Provided the contents of either these registers is greater
than the counter value, the corresponding PWM0, PWM1, PWM2, PWM3, PWM4 or PWM5 output is
set HIGH. If the contents of these registers are equal to, or less than the counter value, the output will
be LOW. The pulse-width-ratio is defined by the contents of the registers PWM0, PWM1, PWM2,
PWM3, PWM4 and PWM5. The pulse-width-ratio is in the range of 0 to 1 and may be programmed in
increments of 1/255. ENPWM0, ENPWM1, ENPWM2, ENPWM3, ENPWM4 and ENPWM5 bit will
enable or disable PWM output.
Buffered PWM outputs may be used to drive DC motors. The rotation speed of the motor would be
proportional to the contents of PWM0/1/2/3/4/5. The repetition frequency
PWM0/1/2/3/4/5 output is given by:
f
f
pwm
pwm
f
, at the
255
)
1
×
2
×
+
=
PWMP
osc
Prescaler division factor = PWM + 1
PWMn high/low ratio of
(PWMn)
-
255
PWMn)
(
PWMn
=
This gives a repetition frequency range of 123 Hz to 31.4K Hz (
registers with either 00H or FFH, the PWM channels will output a constant HIGH or LOW level,
respectively. Since the 8-bit counter counts modulo 255, it can never actually reach the value of the
PWM registers when they are loaded with FFH.
When a compare register (PWM0, PWM1, PWM2, PWM3, PWM4, PWM5) is loaded with a new value,
the associated output updated immediately. It does not have to wait until the end of the current
counter period. There is weakly pulled high on PWM output.
osc
f
= 16M Hz). By loading the PWM
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| W79E548 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E548A40PL | 功能描述:IC MCU 8-BIT 64K FLASH 68-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W79 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數:21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| W79E548A40PN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E549 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E549A40PL | 功能描述:IC MCU 8-BIT 32K FLASH 68-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W79 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數:21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
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