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參數(shù)資料
| 型號： | P2042A-08SR |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 時鐘及定時 |
| 英文描述： | LCD Panel EMI Reduction IC |
| 中文描述： | 2042 SERIES, PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 353K |
| 代理商： | P2042A-08SR |
August 2005
rev 1.3
Spread Spectrum Selection
The
Modulation Selection Table
defines the possible spread spectrum options. The optimal setting should minimize system
EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center
frequency. (Note: The center frequency is the frequency of the external reference input on CLKIN, pin1).
For example, P2042A is designed for high-resolution, flat panel applications and is able to support an XGA (1024 x 768) flat
panel operating at 65MHz (FIN) clock speed. A spreading selection of CP0=0, CP1=1 and SR0=0 provides a percentage
deviation of ±1.00% from F
IN
. This results in the frequency on ModOUT being swept from 65.65 to 64.35MHz at a modulation
rate of 101.54KHz.
Refer Modulation Selection Table
. The example in the following illustration is a common EMI reduction
method for a notebook LCD panel and has already been implemented by most of the leading OEM and mobile graphic
accelerator manufacturers.
Application Schematic for Mobile LCD Graphics Controllers
P2042A
Notice: The information in this document is subject to change without notice.
LCD Panel EMI Reduction IC
3 of 8
Modulated 65MHz signal with
±1.00% deviation and
modulation rate of 101.54KHz.
This signal is connected back to
the spread spectrum input pin
(SSIN) of the graphics
accelerator.
1
2
3
4
CLKIN
CP0
CP1
VSS
SR0
5
6
7
8
SSON#
ModOUT
VDD
65MHz from graphics accelerator
+3.3V
0.1μF
P2042A
Digital control for the SS enable
or disable
相關PDF資料 |
PDF描述 |
|---|---|
| P2042A-08ST | LCD Panel EMI Reduction IC |
| P2042A-08TR | LCD Panel EMI Reduction IC |
| P2042A-08TT | LCD Panel EMI Reduction IC |
| P2042AF-08TR | LCD Panel EMI Reduction IC |
| P2042AG-08SR | LCD Panel EMI Reduction IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| P2042A-08ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:LCD Panel EMI Reduction IC |
| P2042A-08TR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:LCD Panel EMI Reduction IC |
| P2042A-08TT | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:LCD Panel EMI Reduction IC |
| P2042AF-08SR | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:LCD Panel EMI Reduction IC |
| P2042AF-08ST | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:LCD Panel EMI Reduction IC |
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