參數(shù)資料
型號(hào)： P83C266
廠商： NXP Semiconductors N.V.
英文描述： Microcontrollers for PAL/SECAM TV with OSD and VST(帶 OSD和 VST的在PAL/SECAM TV中應(yīng)用的微控制器)
中文描述： 對(duì)于PAL微控制器/ OSD和偉仕SECAM電視（帶OSD和偉仕的在PAL制式/ SECAM電視中應(yīng)用的微控制器）
文件頁(yè)數(shù)： 44/92頁(yè)
文件大?。?/td> 382K
代理商： P83C266
1999 Mar 10
44
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
16 ANALOG-TO-DIGITAL CONVERTERS (ADC)
The 3 channel ADC consists of a 4-bit Digital-to-Analog
Converter (DAC), a comparator, an analog channel
selector and control circuitry. The block diagram of the
ADC circuit is shown in Fig.27.
One of these channels can be used to measure the level
of the Automatic Frequency Control signal. This is
achieved by comparing the ADC signal with the output of
a 4 bit DAC using the comparator (accuracy
±
1
2
LSB).
The ADC inputs ADC0, ADC1 and ADC2 share the same
pins as general I/O port lines P3.0, P3.1 and P3.2,
respectively. Selection of the pin function as either an ADC
input or a general I/O port line is achieved using bits
ADCE0, ADCE1 and ADCE2 in SFR SAD2 (see
Section 16.2).
The conversion time of the ADC is equal to 8 machine
cycles (8
μ
s at 12 MHz). Some NOP instructions should be
added in between the instruction which changes the
reference voltage or the channel selection and the
instruction which reads the VHI register bit. The ST bit
must be set to a logic 1 at the same time as the reference
voltage or channel selection change, otherwise the VHI
state of the previous comparison will be read out.
The recommended procedure is as follows:
1.
Write SFR SAD (X, CH<1:0>, ST = 1, SAD<3:0>)
2.
Wait 8 machine cycles (for example 8 NOPs)
3.
Read SFR SAD for VHI value.
ST is reset by hardware when it is set to a logic 1 by a
written instruction. When ST is read, the value is always a
logic 0.
Fig.27 ADC block diagram.
handbook, full pagewidth
4-BIT DAC
COMPARATOR
EN
SAD3
SAD2
SAD1
SAD0
ADCE1
ADCE0
ADCE2
CH1
CH0
MGL397
ADC enable selection (SFR address: CAH)
AFC value selection (SFR address: C8H)
ENABLE
SELECTOR
ADC
CHANNEL
SELECTOR
P3.2/ADC2
P3.1/ADC1
P3.0/ADC0
Vref
DERIVATIVE PORT
SELECTOR
EN1
EN0
VHI
(SFR address: C8H)
internal bus
Channel selection
EN2
相關(guān)PDF資料
PDF描述
P83C766BDP Microcontrollers for PAL/SECAM TV with OSD and VST
P83C566 Microcontrollers for PAL/SECAM TV with OSD and VST
P83C566BDR Microcontrollers for PAL/SECAM TV with OSD and VST
P83C366BDR Microcontrollers for PAL/SECAM TV with OSD and VST(帶 OSD和 VST的在PAL/SECAM TV中應(yīng)用的微控制器)
P83C366CBP Microcontrollers for PAL/SECAM TV with OSD and VST(帶 OSD和 VST的在PAL/SECAM TV中應(yīng)用的微控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P83C266BDR 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST
P83C270 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
P83C270AAR 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
P83C280 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc.
P83C366 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*