Major Ic Internal Block Diagram And Pin Description; Block Diagram - LG GCE-8240B Service Manual

MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION

IC401 (CXA2638R) : CD-R/RW Analog Signal Processor

Block Diagram

75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
PHC1
76
BHC1
77
BHC3
78
BETAOUT 79
PHO2 80
BHO2 81
PHC2 82
BHC2 83
RRFIN 84
RRF
85
Vcc 86
RFIN
87
GND 88
VTIREF
89
HOLDTC
90
ODREF
91
WREF 92
VWDC 93
VWDCN 94
APC
APCCSW
95
RREF
96
VRDC
97
VRDCN 98
SHOUT 99
FPDO
100
1 2
30
RFEQ
S/H MATRIX
3 4 5 6 7 8 9
CE
MPX
RFRP
BIAS
SADBC
SADO
SBCO
10 11 12 13 14 15 16
SPP
FE TE
REGISTER
ATIP
17 18 19 20 21 22 23
50 XTAND
49 CS
48 WLDON
47 TFGCNT
46 AGCON
45 HOLDSW
44 ERGCNT
43 SCLK
42 SDATA
41 XLAT
40 Vcc
39 DVcc
38 ATFG
37 RECD
36 GND
35 ROPCSH
34 M/SPDSH
33 WBLSH
32 RFPDSH
31 WFPDSH
30 DSPVcc
29 VC
VC
28 DVC
27 HDVC
26 VCT1
24 25