參數(shù)資料
型號： UPSD3233BV-40U1T
廠商： 意法半導體
英文描述： Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM
中文描述： 閃存可編程系統(tǒng)設備與8032微控制器核心和64Kbit SRAM的
文件頁數(shù)： 72/176頁
文件大小： 1081K
代理商： UPSD3233BV-40U1T
μ
PSD323X
72/176
PULSE WIDTH MODULATION (PWM)
The PWM block has the following features:
I
Four-channel, 8-bit PWM unit with 16-bit
prescaler
I
One-channel, 8-bit unit with programmable
frequency and pulse width
I
PWM Output with programmable polarity
4-channel PWM unit (PWM 0-3)
The 8-bit counter of a PWM counts module 256
(i.e., from 0 to 255, inclusive). The value held in
the 8-bitcounteris comparedto thecontents of the
Special Function Register (PWM 0-3) of thecorre-
sponding PWM. The polarity of the PWM outputs
is programmable and selected by the PWML Bit in
PWMCON register. Provided the contents of a
PWM 0-3 register is greater than the counter val-
ue, the corresponding PWM output is set HIGH
(with PWML = 0). When the contents of this regis-
ter is less than or equal to the counter value, the
corresponding PWM output is set LOW (with
PWML = 0). The pulse-width-ratio is therefore de-
fined by the contents of thecorresponding Special
Function Register (PWM 0-3) of a PWM. By load-
ing the corresponding Special Function Register
(PWM 0-3) with either 00H or FFH, the PWM out-
put can be retained at a constant HIGH or LOW
level respectively (with PWML = 0).
For each PWM unit,there is a 16-bit Prescaler that
are used to divide the main system clock to form
the input clock for the corresponding PWM unit.
This prescaler is used to define thedesired repeti-
tion rate for the PWM unit. SFR registers B1h -
B2h are used to hold the 16-bit divisor values.
The repetition frequency of the PWM output is giv-
en by:
fPWM
8
= (f
OSC
/ prescaler0) / (2 x 256)
And the input clock frequency to the PWM
counters is = f
OSC
/ 2 / (prescaler data value + 1)
See the I/O PORTS (MCU Module), page 46 for
more information on how to configure the Port 4
pin as PWM output.
相關(guān)PDF資料
PDF描述
uPSD3233 Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器)
uPSD3234(中文) Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器)
uPSD3212C(中文) Flash Programmable System Devices with 8032 Microcontroller Core and 16Kbit SRAM(帶8032微控制器內(nèi)核和16Kbit SRAM的FLASH可編程系統(tǒng)器件)
uPSD3254A(中文) Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件)
uPSD3254BV(中文) Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPSD3233BV-40U6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233BV-40U6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD32348V24V6ES 制造商:ST MICRO 功能描述:*
UPSD3234A 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3234A-24T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
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