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參數(shù)資料
| 型號： | W78C378P |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MONITOR MICROCONTROLLER |
| 中文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 25/38頁 |
| 文件大?。?/td> | 396K |
| 代理商： | W78C378P |
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Preliminary W78E378/W78C378/W78C374
Publication Release Date: December 1999
- 25 - Revision A1
Parabola Interrupt Generator
The parabola interrupt generator is a 13-bit auto-reload timer, which generates an interrupt to the
CPU periodically for software to load the parabola waveform data to the dynamic DACs
(DAC8
DAC10). The software should calculate the value of the PARAH and PARAL registers by:
(Vcount
×
16)
÷
segment number. The segment number is the number of integration segments
between two Vsync pulses. The interrupt interval is programmable:
Time base = 1/Fosc
Programmable interrupt period = Time base
×
(PARAH
×
256 + PARAL + 1)
Maximum period = Time base
×
8192
Note: Zero value in [PARAH, PARAL] is inhibited.
A-to-D Converter
(ref. Application Note in Appendix A.)
One 4-bit Analog-to-Digital Converter.
Conversion time = (6/Fosc)
×
128 sec.
7 channels selected by an analog multiplexer
(ADCS2, ADCS1, ADCS0) (0, 0, 0) (0, 0, 1) (0, 1, 0)
(0, 1, 1) (1, 0, 0) (1, 0, 1) (1, 1, 0)
Selected Channel
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
The conversion of the ADC is started by setting bit ADCSTRT in CTRL1 by software. When the
conversion is completed, the ADCSTRT bit is cleared by hardware automatically, and the ADCINT bit
in INTVECT is set by hardware at the same time if MADCINT in INTMSK is set.
PWM DACs
Eight 8-bit Static DACs: DAC0 DAC7
The PWM frequency F
PWM
= Fosc ÷ 255
The duty cycle of the PWM output = Register value ÷ 255
The DC voltage after the low pass filter = V
CC
×
duty cycle
Static DAC application circuit:
Static DAC
Low-pass filter
V
OUTPUT
R
C
T = RC
V
OUTPUT
= V
CC
n/255, if T >> T
PWM
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W78E378 | MONITOR MICROCONTROLLER |
| W78E378P | MONITOR MICROCONTROLLER |
| W78C438B | 8-BIT Microcontroller(8位的微控制器) |
| W78C438C40FL | 8-BIT MICROCONTROLLER |
| W78C438C40PL | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W78C438 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT EMULATION MICROCONTROLLER |
| W78C438BF-16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| W78C438BF-24 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| W78C438BF-33 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| W78C438BF-40 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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