參數(shù)資料
型號(hào): W78E858A40FL
廠商: Nuvoton Technology Corporation of America
文件頁(yè)數(shù): 7/35頁(yè)
文件大小: 0K
描述: IC MCU 8-BIT 32K FLASH 44-PQFP
標(biāo)準(zhǔn)包裝: 96
系列: W78
核心處理器: 8052
芯體尺寸: 8-位
速度: 40MHz
連通性: EBI/EMI,串行端口
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-BQFP
包裝: 托盤
W78E858
5.11 Pulse Width Modulator System
The pulse width modulator system of W78E858 contains four PWM output channels with a common 8-
bit counter. These channels generate pulses of programmable length and interval. The prescaler and
counter are common to four PWM channels.
5.11.1 PWMCON (91H)
BIT
NAME
FUNCTION
7
4
-
Reverse
3
PWM3
Enable P1.7 as PWM clock output.
2
PWM2
Enable P1.6 as PWM clock output.
1
PWM1
Enable P1.5 as PWM clock output.
0
PWM0
Enable P1.4 as PWM clock output.
5.11.2 PWMP (92H)
The prescaler is loaded with the complement of the PWMP register during counter overflow. The
repetition frequency is defined by 8-bit prescaler which clocks the counter. The prescaler division
factor = (PWMP + 1). Reading the PWMP gives the current reload value. The actual count of the
prescaler can’t be read.
The PWM counter is enabled with any bit PWMENn (n = 0, 1, 2, 3) of the PWMCON register. Output to
the port pin is separately enabled by setting the PWMENn bits in the PWMCON register. The PWM
function is reset by a chip reset. In idle mode, the PWM will function as configurated in PWMCON. In
power-down state of the PWM will freeze when the internal clock stops. If the chip is awakened with
an external interrupt, the PWM will continue to function its state when power-down was entered.
The repetition frequency is given by:
Fpwm =
Fosc
[255 x (1+PWMP)]
An oscillator frequency of 24 MHz results in a repetition range of 367.65 Hz to 94.12 KHz. The
high/low ratio of PWMn is DACn/(255-DACn) for DACn values except 255. A DACn value 255 results
in a high PWMn output.
Publication Release Date: April 22, 2008
- 15 -
Revision A8
相關(guān)PDF資料
PDF描述
W83303AG IC ACPI CONTROLLER 48-LQFP
W83627UHG IC I/O CONTROLLER 128-QFP
W83L951DG IC EMBEDDED CNTRLR 128-LQFP
X90100M8IZT1 IC DIGITAL CAPACITOR NV 8-MSOP
X9015WS8T1 IC XDCP SGL 32-TAP 10K 8-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78E858A40PL 功能描述:IC MCU 8-BIT 32K FLASH 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W78 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI,I²C,UART/USART 外圍設(shè)備:POR,PWM,WDT 輸入/輸出數(shù):40 程序存儲(chǔ)器容量:- 程序存儲(chǔ)器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC(J 形引線) 包裝:帶卷 (TR)
W78ERD2 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2_07 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2A 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2A40DL 功能描述:IC MCU 8-BIT 64K FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W78 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO,I²C,LIN,UART/USART 外圍設(shè)備:DMA,LVD,POR,PWM,WDT 輸入/輸出數(shù):27 程序存儲(chǔ)器容量:16KB(16K x 8) 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤