參數(shù)資料
型號： TZA1047HL/M3
廠商： NXP SEMICONDUCTORS
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： 10 X 10 MM, 1.4 MM HEIGHT, PLASTIC, MS-026, SOT314-2, LQFP-64
文件頁數(shù)： 13/69頁
文件大?。?/td> 324K
代理商： TZA1047HL/M3
9397 750 14664
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 1 June 2005
20 of 69
Philips Semiconductors
TZA1047
Preprocessor IC for CD and DVD rewritable
QS is the central-spot sum signal generated by the Distributor. IT is the level of threshold
current for dropout concealment with which it is compared. IN is an output-scaling current.
IT and IN are programmable via the I2C-bus by IN[3:0] and IT[3:0].
7.7.1 Test mode
The control bits TSTDPD1 and TSTDPD2 are intended for test and evaluation purposes
only and should be set to logic 0 for normal operation.
7.8 FTC circuit
A detailed block diagram of the FTC subcircuit is shown in Figure 8. The entire FTC block
can be powered down by setting bit FTCON to logic 0.
The FTC circuit supports detection modes: CA, PP, DPD with either 1 or 3-spot tracking.
The FTC mode is controlled by bits FSEL, CA/PP2, SP3/1 and D/F. The different modes of
signal ftc (output FTC before ltering and slicing) that are possible are given in Table 8.
Note that bit CA/PP2 is not the same as bit CA/PP which is used to control the operation
of the Distributor. Having two CA/PP bits allows different settings for FTC and servo
signals in the application.
Table 7:
DTDP and DTDn output values
DPOL
QS
DTDP
DTDn
0QS > IT
IDo + (dtd1 dtd2)IN
IDo (dtd1 dtd2)IN
0QS < IT
IDo + (dtd1 dtd2)INQS/IT
IDo (dtd1 dtd2)INQS/IT
1QS > IT
IDo (dtd1 dtd2)IN
IDo + (dtd1 dtd2)IN
1QS < IT
IDo (dtd1 dtd2)INQS/IT
IDo + (dtd1 dtd2)INQS/IT
Fig 8.
FTC circuit.
001aab188
FTC
LPF
I/V
3.0
FTCF
FTCON
FTC CIRCUIT
VFTC(DC)
GFTC
RFTCOUT
CFTC
HPF
X
FSEL
FE
+ FF
FG
+ FH
DTDp, DTDn
FE to FH
from
Distributor
FAD, FBC
from DPD
γ
FTCSL
X
FAD
+ FBC
FAD, FBC
[FAD
+ γ
× (FF + FH)]
[FBC
+ γ
× (FE + FG)]
FE
+ FG
FF
+ FH
γ
D/F
CA/PP2
SP3/1
D
AT, GRAT
γ
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