CS4954 CS4955

5.11 。支持图文电视..................................................................................................... 23

5.12 。彩条发生器............................................... ................................................ 25

5.13 。 VBI编码.......................................................................................................... 25

5.14 。超白/超黑的支持............................................ .............................. 26

5.15 。中断................................................................................................................ 26

5.16 。通用I / O端口............................................ ........................................... 26

6.滤波器响应...................................................................................................... 27

7.模拟..........................................................................................................................三十

7.1 。模拟时序........................................................................................................三十

7.2 。 VREF ......................................................................................................................三十

7.3 。 ISET .......................................................................................................................三十

7.4 。数模转换器......................................................................................................................三十

7.4.1 。亮度DAC ................................................ .......................................... 30

7.4.2 。色度DAC ................................................ ...................................... 30

7.4.3 。 CVBS DAC ................................................ .................................................. 31

7.4.4 。红DAC ..................................................................................................... 31

7.4.5 。绿色DAC ................................................ .................................................. 31

7.4.6 。蓝DAC ..................................................................................................... 31

8.编程.............................................................................................................. 32

8.1 。主机控制接口............................................... ............................................. 32

8.1.1. I

2

C接口................................................ ................................................ 32

8.1.2 。 8位并行接口............................................. .................................... 33

8.2 。注册说明................................................ ............................................... 34

8.2.1 。控制寄存器................................................ ......................................... 34

9.电路板设计和布线注意事项........................................... ......... 50

9.1 。电源和地平面.............................................. ....................................... 50

9.2 。电源去耦............................................... ....................................... 50

9.3 。数字互连................................................ ................................................ 50

9.4 。模拟互连................................................ ............................................... 50

9.5 。模拟量输出保护............................................... ........................................ 51

9.6 。 ESD保护....................................................................................................... 51

9.7 。外部DAC输出滤波器.............................................. ....................................... 51

10引脚说明......................................................................................................... 53

11.封装图...................................................................................................... 55

DS278PP4

3