MN662785TBUC Datasheet, PDF (43/89 Pages) Panasonic Semiconductor – LSI FOR COMPACT DISC/CD ROM PLAYER

MN662785TBUC


(F)-11ɹTraverse fine adjustment gain setting (TRVG0)ɹɹɹɹɹɹɹɹɹɹɹ ɹɹ Table 7-1-4 (28)
Data
(D7 to D0)
Address Command
(HEX) (HEX)
(A7 to A0) (B7 to B0)
Function
Setting
at reset
D7 D6 D5 D4 D3 D2 D1 D0 37
F2
Traverse gain ɹ(0 to 127)
18
TRVG0/16ɹɹɹɹɹɹɹɹɹɹ
Set the above value after setting the TRV value.
(F)-12ɹSetting of automatic adjustment range


The limits of adjustment values can be set arbitrarily in the range of 1/2⁸ to 255/2 (or ʵ48 dB to
Ê´42 dB).
In order to ensure automatic gain convergence within a limited, narrow adjustment range to prevent
excessive gain change, which had difficulty in convergence control, however, make sure that the maximum
automatic adjustment range is ±9 dB on the basis of the gain set value.
ɾTracking gain
ɹAutomatic adjustment rangeɹɹɹGLT3/GLT4 to GLT1/GLT2ɹɹɹɹ
Data
(D7 to D0)
Address Command
(HEX) (HEX)
(A7 to A0) (B7 to B0)
Function
D7 D6 D5 D4 D3 D2 D1 D0 3D
0 0 0 0 D3 D2 D1 D0 _3E
D7 D6 D5 D4 D3 D2 D1 D0 3F
0 0 0 0 D3 D2 D1 D0 ₄₀
Tracking gain upper limit
F2
GLT1 (mantissa) (128 to 255)
GLT2 (exponent) (0 to 7)
Upper limit: GLT1/2^8-GLT2
Tracking gain lower limit
GLT3 (mantissa) (128 to 255)
GLT4 (exponent) (0 to 7)
Lower limit: GLT3/2^8-GLT4
Table 7-1-4 (29)
Setting
at reset
212
2
106
0
ɾ
Focus gain
ɹAutomatic adjustment rangeɹɹɹGLF3/GLF4 to GLF1/GLF2
Table 7-1-4 (30)
Data
(D7 to D0)
Address Command
(HEX) (HEX)
(A7 to A0) (B7 to B0)
Function
Setting
at reset
D7 D6 D5 D4 D3 D2 D1 D0 ₃₉
F2
Focus gain upper limit
GLF1 (mantissa) (128 to 255)
143
0 0 0 0 D3 D2 D1 D0 3A
GLF2 (exponent) (0 to 7)
4
Upper limit: GLF1/2^8-GLF2
Focus gain lower limit
D7 D6 D5 D4 D3 D2 D1 D0 3B
0 0 0 0 D3 D2 D1 D0 3C
GLF3 (mantissa) (128 to 255)
144
GLF4 (exponent) (0 to 7)
1
Lower limit: GLF3/2^8-GLF4
SDD00026AEM
43