參數(shù)資料
型號(hào)： P83C380
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(帶DDC接口，同步監(jiān)測和同步處理的監(jiān)視器微控制器)
中文描述： 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, PLASTIC, SOT-270-1, SDIP-42
文件頁數(shù)： 58/84頁
文件大?。?/td> 420K
代理商： P83C380
1997 Dec 12
58
Philips Semiconductors
Product specification
Microcontrollers for monitors with DDC
interface, auto-sync detection and sync proc.
P83Cx80; P87C380
19.2.5
H
ORIZONTAL MODE DETECTION
This function block determines the following 4 parameters: Hper, Hpol, Hpres and Hcha. The functional block diagram is
shown in Fig.29.
The 12-bit counter for the determination of the horizontal period has a synchronous reset and will be reset by the
prescaled and differentiated horizontal pulse HSYNC_P, coming from the horizontal prescaler, or in case the counter
reaches the value FF0H as defined by the comparator. The latter situation will occur if no sync pulses are coming in or
if the frequency of the incoming sync pulses is too low.
The 12-bit register, that will store the 4 line time period, is only enabled if the signal HENA is HIGH.
19.2.5.1
Parameter Hper
Based on this configuration, the resulting accuracy for Hper will be:
Accuracy in H
Table 63
Accuracies
XTAL (f
clk
)
(MHz)
FOSH
(MHz)
ACCURACY IN H AT 30KHZ
(%)
ACCURACY IN V AT 50HZ
(%)
10
12
16
10
12
8
0.075
0.063
0.094
0.038
0.032
0.048
Fig.28 Vertical sync separator.
handbook, full pagewidth
MGG037
8-BIT
COUNTER
E
R
Q7 to Q0
DIFFERENTIATOR
D-FF
D
E
Q
COMPARATOR
FOR
SYNC
SEPARATION
DIV 16
Vsep
HSYNC_P
FOSH
Hper
(horizontal counter value)
=
100%
×
f
H
×
FOSH
4
=
相關(guān)PDF資料
PDF描述
P87C380 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(帶DDC接口，同步監(jiān)測和同步處理的監(jiān)視器微控制器)
P83C880 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(帶DDC接口，同步監(jiān)測和同步處理的監(jiān)視器微控制器)
P83C180 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(帶DDC接口，同步監(jiān)測和同步處理的監(jiān)視器微控制器)
P83C370AAR 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)
P83C570AAR Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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P83C434CFP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with LCD-driver
P83C453EBAA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM, expanded I/O
P83C453EFAA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers
P83C504GBA 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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