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參數(shù)資料
| 型號： | SAA7138 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | The Digital Video Decoder/Encoder Modules(數(shù)字視頻譯碼器/編碼器模塊) |
| 中文描述： | 數(shù)字視頻解碼器/編碼器模塊（數(shù)字視頻譯碼器/編碼器模塊） |
| 文件頁數(shù)： | 9/53頁 |
| 文件大?。?/td> | 456K |
| 代理商： | SAA7138 |
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Module System: 7128MOD2
Philips Semiconductors
9
Application Note
AN 97085
2.1
Power supply
The +5V analog and digital power supply should be kept separate at the power connector. Analog and digital
ground must be connected once near the power supply units.
A negative voltage (-5V) is one part of the MPC module system supply voltages but is not necessary for this
application.
All supply voltages are available at the VG96 input connector according to the pinning on page 10.
2.2
Reset
There are two different ways to reset the device:
Using this module in conjunction with a MPC decoder module, preferably the ’Reset Not’ generated by the deco-
der should be used (JP26 = Extern). Therefore a dedicated pin exists at the VG96 input connector.
In case of a stand alone operation (e.g. colourbar generator) or in conjunction with other systems the Reset
push-button can be used (JP26 = Switch).
During reset (RESN = LOW) and after reset is released, all digital I/O stages are set to input mode, PAL-Black-
burst on CVBS, VBS and C; all analog outputs are set to high impedance. A reset forces the I2C-bus interface to
abort any running bus transfer and sets register 3A to 03H, register 61 to 06H and registers 6BH and 6EH to 00H.
All other control registers are not influenced by a reset.
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