參數(shù)資料
型號： uPSD3233
廠商： 意法半導(dǎo)體
英文描述： 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)
中文描述： 閃存可編程系統(tǒng)器件與8032微控制器內(nèi)核（嵌入高速“8032微控制器核”的閃存型可編程系統(tǒng)器）
文件頁數(shù)： 64/164頁
文件大?。?/td> 1133K
代理商： UPSD3233
μ
PSD3200 FAMILY
64/164
DRAFT(Thursday 20 June 2002, 13:15).
PULSE WIDTH MODULATION (PWM)
The PWM unit has the following features:
I
4 Channel 8-bit PWM unit with 16-bit prescaler
I
Programmable polarity
The 8-bit counter of a PWM counts modulo 256,
i.e. from 0 to 255 inclusive. The value held in the
8-bit counter is compared to the contents of the
Special Function Register (PWMn) of the corre-
sponding PWM. The same is true for the one 16-
bit PWM, only two SFRs are used to hold the 16-
bit valuesand thecounter can run from 0 to 65535
inclusive. The polarity of the PWM outputs is pro-
grammable and selected by the PWMLVL bit in
PWMCON register. Provided the contents of a
PWMn register is greater than the counter value,
the corresponding PWM output is set HIGH (with
PWMLVL=”0”). When the contents of this register
is less than or equal to the counter value, the cor-
responding PWM output is set LOW (with PWM-
LVL=”0”).
The
pulse-width-ratio
defined by the contents of the correspondingSpe-
is
therefore
cial FunctionRegister (PWMn) of a PWM. By load-
ing the corresponding Special Function Register
(PWMn) with either 00H or FFH, the PWM output
can be retained at a constant HIGH or LOW level
respectively (with PWMLVL = 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
= (fOSC / prescaler0) / (2 x 256)
And the input clock frequency to the PWM
counters is = fOSC / 2 / (prescaler data value + 1)
See the I/O Port section on how to configure the
Port4 pin as PWM output.
相關(guān)PDF資料
PDF描述
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)
UPSD3234A Flash Programmable System Devices with 8032 Microcontroller Core
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPSD3233A-24T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233A-24T1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3233A-24T6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233A-24T6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3233A-24U1 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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