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| 型號： | SIS300 |
| 廠商： | SILICON INTEGRATED SYSTEMS CORP |
| 元件分類： | 圖形處理器 |
| 英文描述： | GRAPHICS PROCESSOR, PBGA365 |
| 封裝： | 27 X 27 MM, BGA-365 |
| 文件頁數(shù)： | 34/115頁 |
| 文件大?。?/td> | 2426K |
| 代理商： | SIS300 |
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SiS300 2D/3D/Video/DVD Accelerator
Preliminary V0.3 March 23, 1999
17
Silicon Integrated Systems Corporation
color value to three analog voltages for red, green, and blue.
2.8.8
READ-AHEAD CACHE
With read-ahead cache, the times of the operation of display memory read will be reduced,
thus enhance the performance.
2.8.9
POST WRITE BUFFER
The post write buffer contains a buffer of CPU write accesses to display memory that have
not been executed because of memory arbitration. With this buffer, the SiS300 will release
CPU as soon as it records the address and data, and then write into display memory when
the display memory is available. Thus CPU performance is increased.
2.8.10 INTERNAL TRIPLE-CLOCK SYNTHESIZER
SiS300 has built-in a triple-clock synthesizer to generate the MCLK, ECLK and VCLK. This
clock synthesizer can generate several variable frequencies, thus it can provide the flexibility
for selecting the working frequency.
The Triple-Clock Synthesizer generates MCLK, ECLK and VCLK with single external
reference clock.(14.318MHz) With this characteristic, we can set the MCLK at the maximum
speed which the display memory can work normally, thus it takes the advantage of the real
peak memory bandwidth and improves the graphics performance. And we can set the ECLK
at the maximum speed which the 3D engine can work normally, thus it takes the advantage
of the real peak 3D engine bandwidth and improves the graphics performance. The ECLK
frequency can be dynamically reduced when the 3D engine is not busy for reducing the
whole chip power consumption.
The following block diagram is for clock synthesizer.
Numerator
CP
VCO
DeNumerator
Divider
Post Scaler
fr
GAIN
+
-
fd
PD
Figure 2.8-1 Block Diagram of Clock Synthesizer
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SIS3100 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Colro Image Sensor Camera Module |
| SIS312 12VDC | 制造商:ELESTA relays 功能描述:SAFETY RELAY 4PST-3NO/1NC 12VDC 6A 制造商:ELESTA relays 功能描述:SAFETY RELAY, 4PST-3NO/1NC, 12VDC, 6A, Coil Voltage VDC Nom:12V, Coil Resistance:285ohm, Contact Current Max:6A, Contact Voltage AC Nom:250V, Contact Voltage DC Nom:440V, Contact Configuration:3PST-NO / SPST-NC, No. of Poles:4 , RoHS Compliant: Yes |
| SIS312 24VDC | 制造商:ELESTA relays 功能描述:Safety Relay 制造商:ELESTA relays 功能描述:SAFETY RELAY, 4PST-3NO/1NC, 24VDC, 6A; Coil Voltage VDC Nom:24V; Coil Resistance:1.15kohm; Contact Current Max:6A; Contact Voltage AC Nom:250V; Contact Voltage DC Nom:440V; Contact Configuration:3PST-NO / SPST-NC; No. of Poles:4 ;RoHS Compliant: Yes |
| SIS322DNT-T1-GE3 | 功能描述:MOSFET 30V 7.5mOhm@10V 38.3A N-Ch G-IV RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| SIS330DN | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:N-Channel 30 V (D-S) MOSFET |
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