Sony SCD-XB940, Service Manual

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2-6. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC605 MB91107PFV-G-BND (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1, 2 O Address signal output to the expander (IC612) and ROM (IC632)
3 A19/P63 O Address signal output to the expander (IC612)
4, 5 O
Address signal output terminal Not used (open)
6, 7 O Test signal output terminal for check (fixed at “H” in this set)
8 A24/P70 O Address signal output terminal (fixed at “H” in this set)
9 AVCC — Power supply terminal (+3.3V) (for A/D converter)
10 AVRH — Reference voltage input (high) terminal (for A/D converter)
11 AVSS/AVRL —
Ground terminal (for A/D converter) and Reference voltage input (low) terminal
12 to 15 AN0 to AN3 I
Analog input terminal (for A/D converter)
16 TRG0/PH0 O Reset signal output to the expander (IC612) “L”: reset
17 TRG1/PH1 O SACD/CD mode signal output to the digital filter (IC301)
18 TRG2/PH2/CS6X O Serial data output to the digital filter (IC301)
19 TRG3/PH3/CS7X O
Shift signal output to the digital filter (IC301)
20 OCPA0/PH4 O
Latch signal output to the digital filter (IC301)
21 OCPA1/PH5 O Initial signal output to the digital filter (IC301)
22 OCPA2/PH6 O Audio muting signal output terminal “L”: muting
23 OCPA3/PH7 O Filter control signal output terminal
24 VCC —
Power supply terminal (+3.3V) (digital system)
25 INT0/PG0 I
External interrupt request signal input terminal Not used (fixed at “H”)
26 INT1/PG1 I Interrupt request 1 signal input from the expander (IC612)
27 INT2/PG2 I External interrupt request signal input terminal Not used (fixed at “H”)
28 INT3/PG3 I Interrupt request 3 signal input from the expander (IC612)
29 to 32 I
External interrupt request signal input terminal Not used (fixed at “H”)
33 SI0/RF0 I Serial data input from the display controller (IC203) and EEPROM (IC600)
34 VSS —
Ground terminal (digital system)
35 SO0/PF1 O
Serial data output to the display controller (IC203) and EEPROM (IC600)
36 SC0/PF2 O Clock signal output to the display controller (IC203) and EEPROM (IC600)
37 SI1/PF3 I Serial data input from the DSD decoder (IC617)
38 SO1/PF4 O Serial data output to the DSD decoder (IC617)
39 SC1/PF5 O
Clock signal output to the DSD decoder (IC617)
40 SI2/PF6 I
Serial data input terminal for check
41 SO2/PF7 O Serial data output terminal for check
42 SC2/PE0 O Clock signal output terminal for check
43 DREQ0/PE1 I External transfer request signal input terminal
44 DACK0/PE2 O
External transfer request acknowledge signal output terminal
45 EOP0/PE3 O
Not used (open)
46 DREQ1/PE4 I External transfer request signal input terminal Not used (fixed at “H”)
47 DACK1/PE5 O External transfer request acknowledge signal output terminal Not used (fixed at “H”)
48 EOP1/PE6 O Not used (open)
49 DREQ2/PE7 I
External transfer request signal input terminal Not used (open)
50 DACK2/PI0 O
External transfer request acknowledge signal output terminal Not used (open)
51 EOP2/PI1/ATGX O Not used (open)
A17/P61,
A18/P62
A20/P64,
A21/P65
A22/P66,
A23/P67
INT4/PG4 to
INT7/PG7
Pin No. Pin Name I/O Description
52 VSS — Ground terminal (digital system)
53 X1 O System clock output terminal (12.5MHz)
54 X0 I
System clock input terminal (12.5MHz)
55 VCC —
Power supply terminal (+3.3V) (digital system)
56 RAS0/PB0 O Control signal output terminal Not used (fixed at “H”)
57 CS0L/PB1 O Interrupt request signal output to the display controller (IC203)
58 CS0H/PB2 O Muting signal output to the DSD decoder (IC617) “L”: muting
59 DW0X/PB3 O
Not used (open)
60 RAS1/PB4 O
Latch signal output to the DSD decoder (IC617)
61 CS1L/PB5 O Not used (open)
62 CS1H/PB6 I Ready signal input from the DSD decoder (IC617) “L”: ready
63 DW1X/PB7 O Write enable signal output terminal “L”: active
64 C —
Bypass capacitor terminal for internal capacitor
65 CS0X O Chip select signal output to the ROM (IC632) “L”: active
66 CS1X/PA1 O Chip select signal output to the expander (IC612) and S-RAM (IC632) “L”: active
67, 68 O Chip select signal output terminal “L”: active (fixed at “H” in this set)
69 CS4X/PA4 O Chip select signal output to the expander (IC612) “L”: active
70 CS5X/PA5 O Chip select signal output terminal “L”: active (fixed at “H” in this set)
71 CLK/PA6 O Clock signal output to the expander (IC612)
72 NMIX I
Non maskable interrupt signal input terminal “L”: active (fixed at “H” in this set)
73 HSTX I
Hardware standby signal input terminal “L”: active (fixed at “H” in this set)
74 RSTX I Reset signal input from the display controller (IC203)
75 VSS — Ground terminal (digital system)
76 MD0 I Mode set signal input terminal (fixed at “H”)
77, 78 MD1, MD2 I
Mode set signal input terminal (fixed at “L”)
79 RDY/P80 I
Wait signal input from the expander (IC612)
80 BGRNTX/P81 O External bus release acknowledge signal output terminal (fixed at “H” in this set)
81 BRQ/P82 I External bus release request signal input terminal (fixed at “L” in this set)
82 RDX O Read strobe signal output to the expander (IC612)
83 WR0X O
Write strobe 0 signal output to the expander (IC612)
84 WR1X/P85 O
Write strobe 1 signal output to the expander (IC612)
85 to 92 I/O Two-way data bus with the S-RAM (IC609) and ROM (IC632)
93 to 100 D24 to D31 I/O
Two-way data bus with the servo digital signal processor (IC607), S-RAM (IC609), expander
(IC612) , RF signal decoder (IC622), and ROM (IC632)
101 VSS — Ground terminal (digital system)
102 A00 O
Address signal output to the servo digital signal processor (IC607), expander (IC612) , and RF
signal decoder (IC622)
103 A01 O
Address signal output to the servo digital signal processor (IC607), S-RAM (IC609), expander
(IC612) , RF signal decoder (IC622), and ROM (IC632)
104 to 107 A02 to A05 O
Address signal output to the S-RAM (IC609), expander (IC612), RF signal decoder (IC622), and
ROM (IC632)
108, 109 A06, A07 O Address signal output to the S-RAM (IC609), RF signal decoder (IC622), and ROM (IC632)
110 VCC —
Power supply terminal (+3.3V) (digital system)
111 to 118 A08 to A15 O Address signal output to the S-RAM (IC609) and ROM (IC632)
119 VSS —
Ground terminal (digital system)
120 A16/P60 O
Address signal output to the S-RAM (IC609) and ROM (IC632)
CS2X/PA2,
CS3X/PA3
D16/P20 to
D23/P27