– 182 –
CXD3068Q
$3A (preset: $3A 00 00)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
FBON FBSS FBUP FBV1 FBV0
FIFZC
TJD0 FPS1 FPS0 TPS1 TPS0
0
SJHD INBK MTI0
FBON:
FBIAS (focus bias) register addition (on/off)
The FBIAS register value is added to the signal loaded into the FCS In register by setting
FBON = 1 (on).
FBSS:
FBIAS (focus bias) register/counter switching
FBSS = 0: register, FBSS = 1: counter.
FBUP:
FBIAS (focus bias) counter up/down operation switching
This performs counter up/down control when FBSS = 1. FBUP = 0: down counter,
FBUP = 1: up counter.
FBV1, FBV0:
FBIAS (focus bias) counter voltage switching
The number of FCS BIAS count-up/-down steps per cycle is decided by these bits.
TJD0:
This sets the tracking servo filter data RAM to 0 when switched from track jump to servo on
only when SFJP = 1 (during surf jump operation).
FPS1, FPS0:
Gain setting when transferring data from the focus filter to the PWM block.
TPS1, TPS0:
Gain setting when transferring data from the tracking filter to the PWM block.
These are effective for increasing the overall gain in order to widen the servo band.
Operation when FPS1, FPS0 (TPS1, TPS0) = 00 is the same as usual (7-bit shift). However,
6dB, 12dB and 18dB can be selected independently for focus and tracking by setting the
relative gain to 0dB when FPS1, FPS0 (TPS1, TPS0) = 00.
SJHD:
This holds the tracking filter output at the value when surf jump starts during surf jump.
INBK:
When INBK = 0 (off), the brake circuit masks the tracking drive signal with TRKCNCL which is
generated by fetching the MIRR signal at the TZC edge. When INBK = 1 (on), the tracking
filter input is masked instead of the drive output.
MTI0:
The tracking filter input is masked when the MIRR signal is high by setting MTI0 = 1 (on).
The counter changes once for each
sampling cycle of the focus servo
filter. When MCK is 128Fs, the
sampling frequency is 88.2kHz.
When converted to FE input, 1 step
is approximately 1/2
9
×
V
DD
×
0.4,
V
DD
= supply voltage.
FBV1
0
0
1
1
0
1
0
1
1
2
4
8
FBV0
Number of steps per cycle
FPS1
0
0
1
1
FPS0
0
1
0
1
0dB
+6dB
+12dB
+18dB
Relative gain
TPS1
0
0
1
1
TPS0
0
1
0
1
0dB
+6dB
+12dB
+18dB
Relative gain
∗
∗
: preset
∗
∗
: preset
∗
Summary of Contents for PV420S
Page 1: ...SERVICE MANUAL PV420S WWW BBK RU ...
Page 72: ... 69 CXD3068Q Block Diagram ...
Page 73: ... 70 CXD3068Q Pin Configuration ...
Page 122: ... 119 CXD3068Q Timing Chart 1 3 ...
Page 123: ... 120 CXD3068Q Timing Chart 1 4 ...
Page 124: ... 121 CXD3068Q Timing Chart 1 5 ...
Page 129: ... 126 CXD3068Q Timing Chart 2 1 ...
Page 130: ... 127 CXD3068Q Block Diagram 2 2 ...
Page 131: ... 128 CXD3068Q Timing Chart 2 3 ...
Page 134: ... 131 CXD3068Q Timing Chart 2 6 ...
Page 138: ... 135 CXD3068Q VCO C Mode Fig 3 3 Access Flow Chart Using VCO Control ...
Page 140: ... 137 CXD3068Q Block Diagram 4 1 ...
Page 143: ... 140 CXD3068Q Timing Chart 4 4 ...
Page 147: ... 144 CXD3068Q Fig 4 6 a Auto Focus Flow Chart Fig 4 6 b Auto Focus Timing Chart ...
Page 148: ... 145 CXD3068Q Fig 4 7 a 1 Track Jump Flow Chart Fig 4 7 b 1 Track Jump Timing Chart ...
Page 149: ... 146 CXD3068Q Fig 4 8 a 10 Track Jump Flow Chart Fig 4 8 b 10 Track Jump Timing Chart ...
Page 150: ... 147 CXD3068Q Fig 4 9 a 2N Track Jump Flow Chart Fig 4 9 b 2N Track Jump Timing Chart ...
Page 151: ... 148 CXD3068Q Fig 4 10 a Fine Search Flow Chart Fig 4 10 b Fine Search Timing Chart ...
Page 152: ... 149 CXD3068Q Fig 4 11 a M Track Move Flow Chart Fig 4 11 b M Track Move Timing Chart ...
Page 157: ... 154 CXD3068Q Fig 4 15 CD TEXT Data Timing Chart ...
Page 162: ... 159 CXD3068Q Fig 5 3a Fig 5 3b ...
Page 196: ... 193 CXD3068Q Description of Data Readout ...
Page 200: ... 197 CXD3068Q ...
Page 201: ... 198 CXD3068Q ...
Page 202: ... 199 CXD3068Q ...
Page 207: ... 204 CXD3068Q Package Outline Unit mm ...
Page 208: ...This data sheet has been made from recycled paper to help protect the environment 205 ...