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參數(shù)資料
| 型號(hào)： | SDA5257M-2 |
| 廠商： | SIEMENS A G |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | ICs for Consumer Electronics |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 文件頁數(shù)： | 14/23頁 |
| 文件大小： | 147K |
| 代理商： | SDA5257M-2 |
SDA 525X-2
Semiconductor Group
14
1998-10-08
6
This delta specification describes the differences of the SDA 525x-2 compared to the
SDA 525x as described in the preliminary data sheet 1997-09-01.
Differences of SDA 525x-2 Compared to SDA 525x
6.1
TVT-2 is pin-compatible to previous versions of TVT. However, some variations in
external components become necessary (see Application Circuit in Chapter
10
):
1. The LC-oscillator is not necessary any longer.
2. The filters 1 and 2 are not needed any longer. Only filter 3 is needed but with different
external device dimensions.
3. Since the RBG outputs deliver a current, a voltage divider can be replaced by a single
resistor (see TVText Design Guide).
4. The external crystal is now 6 MHz instead of 18 MHz.
5. The CVBS-pin needs different dimensioning of the external components due to
changes in the internal clamping circuit.
6. The Iref-pin needs different dimensioning of the external components and an
additional blocking capacitor.
7. To avoid clock cross-talk and to improve the slicer performance use filter circuits at
the power supply pins to decouple digital and analog supplies.
8. Due to a reworked analog concept with the advantage of a more stable circuits and
better performance the power consumption has increased. For the Romless version
a maximum overall IDD-current of 95mA can be reached, for ROM versions up to
100mA.
Furthermore, the MQFP-80-packages now have RD, WR, and PSEN pins to connect to
external RAM.
Hardware-Compatibility
6.2
Only slight software changes may be necessary due to some register changes (see
chapter
7
).
Software-Compatibility
6.3
Due to crystal locked PLLs the robustness of the sync- and data-slicer is improved.
Improved Performance Sync- and Data-Slicer
6.4
The display clock will be locked to the internal PLL locked to the single external
6-MHz-crystal and, by this, will have very low jitter. Furthermore, the display width will
not vary. Procedures to adjust the display clock have to be disabled.
Crystal-locked Display-PLL
6.5
The SDA 5250M-2 (ROMless version P-MQFP-80-1) can also be used with external
RAM, because the pins RD, WR and PSEN are available. Furthermore, optional banking
Improved Interface to External RAM
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| SDA525X-2 | ICs for Consumer Electronics |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SDA525X | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA525X-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA5273 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs |
| SDA5273-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs |
| SDA5273-2P | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs |
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