AK8855 Datasheet, PDF (35/81 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

[ASAHI KASEI]
Timing Chart (Camera I/F)
CIF (NTSC)
AK8855
Register Set : VLF = 1’b0, OFORM[2:0] = 3’b010, OIF[1:0] = 2’b00
HV _H
VAF L
DVALID _H
CLKO
(27.0MHz)
D[7:0] _{0x80 0x10 Cb0 Y0 Cr0 Y1}
Cb348 Y348 Cr348 Y349 Cb350 Y350 Cr350 Y351 0x80 0x10
0x80 0x10
704 clock @CLKO
In case of NTSC, CIF output mode, 2 Lines are output while the 1 line input. HD/VD signal are also output doubled rate.
Timing Chart (Camera I/F)
QCIF (NTSC)
Register Set : VLF = 1’b0, OFORM[2:0] = 3’b011, OIF[1:0] = 2’b00
HV _H
VAF L
DVALID _H
CLKO
(6.75MHz)
D[7:0]
Cb0
Y0
HD _H
CLKO
(6.75MHz)
Cb174
Y174
Cr174
Y175
0x80
0x80
352 clock @CLKO
In case of QCIF, there is a possibility that the Low period of CLKO signal just before the HV falling edge
becomes 1.5 longer than usual case as left chart.
Even in this case, falling edge of HV and falling edge of CLKO is same timing.
MS0319-E-03
35
2004 / 11