msm7664 Oki Semiconductor, msm7664 Datasheet - Page 52

• Manufacturer Part Number: msm7664
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Y/C Separation Circuit option register (YCSC)
Note:
Optional Mode Register B (OMRB)
Note:
Note:
Note:
Default
Recommended Value
Default
Recommended Value
YCSC[7:3]
YCSC[2:0]
OMRB[7:6]
OMRB[5]
OMRB[4]
OMRB[3:0]
Register Name
Register Name
The setting in this register becomes valid when the adaptive filter or the non-adaptive
filter for PAL is selected. In the case of the adaptive filter, it is easier to operate it as a
comb filter irrespective of the correlation between lines in the positive direction, and
in the negative direction, it is easier to operate it as a trap filter irrespective of the
correlation between the lines. Further, in the case of the non-adaptive filter, the
operation is fixed as a comb filter in the positive direction and as a trap filter in the
negative direction, and averaging is done in the intermediate position.
These settings select whether the frequency shift during sub-carrier tracking is done for
the even-numbered lines and odd-numbered lines separately or for both lines.
Although this normally has no effect, if the frequency shift is large when the video is
switched, it is likely that the stability increases if single-sided feedback is selected. This
is valid only during hte PAL video mode.
This selects the free running duration when synchronization is not detected.
This adjusts the burst summation position. This is valid when the color burst signal in
the input is distorted.
Undefined
Adaptive transition comb-filter threshold factor
Undefined
Color lock feedback mode
No synchronous free running
Burst calculation range
OMRB[7]OMRB[6]OMRB[5]OMRB[4]OMRB[3]OMRB[2]OMRB[1]OMRB[0]
YCSC[7] YCSC[6] YCSC[5] YCSC[4] YCSC[3] YCSC[2] YCSC[1] YCSC[0]
0
0
0
0
0
0
0
0
Write only
Write only
0
0
0
0
*0: Single-sided feedback
*0: 30H free running mode
1: Double-sided feedback
1: 6H free running mode
Set to 0
Set to 0
$4: –4 to *$0: 0 to $3: +3
$8: –8 to *$0: 0 to $7: +7
0
0
0
0
<address: $15>
<address: $16>
0
0
0
0
0
0
0
0
PEDL7664-01
0
0
0
0
MSM7664
52/76
0
0
0
0