- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382378 > PCA8515P (NXP SEMICONDUCTORS) Stand-alone OSD PDF資料下載
參數(shù)資料
| 型號： | PCA8515P |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 畫面疊加 |
| 英文描述： | Stand-alone OSD |
| 中文描述： | ON-SCREEN DISPLAY IC, PDIP24 |
| 封裝： | 0.400 INCH, PLASTIC, SOT-234, SDIP-24 |
| 文件頁數(shù)： | 46/64頁 |
| 文件大?。?/td> | 405K |
| 代理商： | PCA8515P |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁當前第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁
1995 Jan 19
46
Philips Semiconductors
Preliminary specification
Stand-alone OSD
PCA8515
11 OSD CLOCK
The on-chip clock generator comprises Phase-Locked
Loop circuitry and is shown in Fig.39. The frequency of the
OSD clock is programmable and is determined by the
contents of the 6-bit counter, which is loaded using
Command 6. The OSD clock frequency is calculated as
shown below; frequencies within the range 4 to10 MHz
can be selected.
Where: 16 < (PLLCN) < 40; (PLLCN) is the decimal value
held in the 6-bit counter.
The Voltage Controlled Oscillator (VCO) is synchronized
to the HIGH-to-LOW edge of f
1
(see Fig.39) which is
always on the traiing edge of f
HSYNC
. The programmable
active level detector will pass the HSYNC signal if it is
programmed as active HIGH or invert the HSYNC signal if
it is programmed as active LOW. The 4-bit prescaler
increments or decrements the output of the VCO in steps
of (16
×
f
HSYNC
).
f
OSD
f
HSYNC
16
PLLCN
(
)
×
×
=
The OSD clock is enabled/disabled using Command 7;
see Section 9.8. When the OSD clock is disabled, the
oscillator remains active, therefore the transient time from
the OSD clock start-up to locking into the external H
SYNC
signal is reduced. As the on-chip oscillator is always active
after power-on, when the OSD clock is enabled no large
currents flow (as for RC or LC oscillators); therefore
radiated noise is dramatically reduced.
Character width is a function of the OSD clock frequency;
decreasing f
OSD
increases the width of the characters.
Therefore, for optimum character display quality the
choice of the OSD clock frequency is important; this is
explained in Chapter 12.
Fig.39 Block diagram of OSD oscillator.
handbook, full pagewidth
MLC349
VOLTAGE
CONTROLLED
OSCILLATOR
CHARGE PUMP
AND
LOOP FILTER
PHASE/
FREQUENCY
DETECTOR
ACTIVE
LEVEL
DETECTOR
PROGRAMMABLE
6-BIT COUNTER
fOSD
divided by N
4-BIT
PRESCALER
HSYNC
OSD disable
fPLL
f1
C
R1
C1
相關PDF資料 |
PDF描述 |
|---|---|
| PCA8515T | Stand-alone OSD |
| PCA8516T | Stand-alone OSD |
| PCA8516 | Stand-alone OSD |
| PCA8516P | Stand-alone OSD |
| PCA8521 | Infrared remote control transmitter RC5 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCA8515T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stand-alone OSD |
| PCA8515T/009 | 制造商:NXP Semiconductors 功能描述:ON-SCREEN DISPLAY IC, PDSO24 |
| PCA8516 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stand-alone OSD |
| PCA85162 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal LCD driver for low multiplex rates |
| PCA85162T/Q900/1,1 | 功能描述:LCD 驅(qū)動器 32 SGMT 4800Hz RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。