tw9910 ETC-unknow, tw9910 Datasheet - Page 11

• Manufacturer Part Number: tw9910
• Description: Power Ntsc/pal/secam Video Decoder With Slicer
• Manufacturer: ETC-unknow

TW9910
TECHWELL, INC.
VD[15:8]
HACTIVE
DVALID
VCLK
HACTIVE
VACTIVE
(OPTION)
DVALID
LVALID
HSYNC
Vertical Down Scaling Output
TW9910 generates Vertical Down Scaling output data. Figure 3 shows its timing. As shown on Figure
3, HACTIVE is NOT generated on invalid line as default (VSCTL is “0”). If VSCTL is set to “1”,
HACTIVE is generated on every lines during VACTIVE active period. DVALID is not generated on
invalid lines in each setting. Invalid lines for Vertical down scaling are generated during VACTIVE active
period. If MODE bit is set to “1” for VIP mode, EAV/SAV codes are not generated on those lines without
HACTIVE signal. All CbCr data will be 80H and all Y data will be 10H the same as H-blanking data in
ITU-R BT.656 data stream.
Figure 2. 8 bit mode Horizontal Down Scaling Output
0x00
Figure 3. Vertical Down Scaling Output
Cb0
11
HACTIVE x 2 VCLK
Y0
Cr0
Y1
360x2 VCLK
Cb2
...
Low Power NTSC/PAL/SECAM
Video Decoder with VBI Slicer
Cb358
Y358
Cr358
Y359
09/21/2006
REV.
A