Sony CDX-848X Service Manual page 35

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Pin No. Pin Name
47, 48 MD0, MD1
49 MD2
50 EJECT SW
51 MAGLK SW
52 SCOR
53 GRSCOR
54 NC
55 HS
56 SQSO
57 NC
58 SQCK
59 CDCLK
60 CDLAT
61 CDDAT
62 XRST
63 XQOK
64 XRDE
65 XWRE
TE
L 13942296513
66 EMPH
67 MUTE
68 RAMA10
69 RAMCS
RAMIO7 to
70 to 74
RAMIO3
75 RESET
76 RAMIO2
77 X1A
78 X0A
79 VSS
80 X0
81 X1
82 VCC
83, 84
RAMIO1, RAMIO0
85 to 88
RAMA0 to RAMA3
89 SINGLE
90 DOUTSEL
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91 CFSEL
92 TEXTSEL
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93 ESPSEL
94 TEST
95 MAG SW
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I/O
I Setting terminal for the CPU operational mode (fixed at "H" in this set)
I Setting terminal for the CPU operational mode (fixed at "L" in this set)
I Eject switch (SW801) input terminal "L" active
I Magazine detect switch (SW201) input terminal "L": magazine is set
I Subcode sync (S0+S1) detection signal input from the CXD3027R (IC101)
Subcode sync (S0+S1) detection signal input from the D-RAM controller section on the
I
CXD3027R (IC101)
O Not used (open)
Normal/high speed playback control signal output terminal
O
"L": high speed playback Not used (open)
I Subcode Q data input from the CXD3027R (IC101)
O Not used (open)
O Subcode Q data reading clock signal output to the CXD3027R (IC101)
O Serial data transfer clock signal output to the CXD3027R (IC101)
O Serial data latch pulse signal output to the CXD3027R (IC101)
O Serial data output to the CXD3027R (IC101)
O System reset signal output to the CXD3027R (IC101) and D/A converter (IC501) "L": reset
O Subcode Q OK pulse signal output to the CXD3027R (IC101) "L" active
O D-RAM read enable signal output to the CXD3027R (IC101) "L" active
O D-RAM write enable signal output to the CXD3027R (IC101) "L" active
O Emphasis control signal output to the D/A converter (IC501) "H": emphasis on
O Audio line muting on/off control signal output "H": muting on
O Address signal output to the S-RAM Not used (open)
O Chip select enable output to the S-RAM Not used (open)
I/O Two-way data bus with the S-RAM Not used (open)
System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC303)
I "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I/O Two-way data bus with the S-RAM Not used (open)
O Sub system clock output terminal Not used (open)
I Sub system clock input terminal Not used (fixed at "L")
— Ground terminal
I Main system clock input terminal (4 MHz)
O Main system clock output terminal (4 MHz)
— Power supply terminal (+3.3V)
I/O Two-way data bus with the S-RAM Not used (open)
O Address signal output to the S-RAM Not used (open)
Setting terminal for the single disc/multiple discs mode
I
"L": single disc mode, "H": multiple discs mode (fixed at "H")
I Analog/digital select switch (SW701) input terminal "L": digital, "H": analog
I Custom file on/off setting terminal "L": custom file on (fixed at "L")
CD text mode setting terminal
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"L": CD text on, "H": does not display track name (fixed at "L")
i
I ESP on/off setting terminal "L": ESP on (fixed at "L")
I Test mode setting terminal "L": test mode Not used (open)
I Magazine in/out detect switch input terminal Not used (open)
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Description
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