Sony MDR-NC300D, Service Manual

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MDR-NC300D
MDR-NC300D
14 14
• IC Pin Function Description
MAIN BOARD IC501 CXD9952GR (DSP)
Pin No. Pin Name I/O Description
1 BCK - Not used
2 XFSIIN - Not used
3 DATAI1 - Not used
4 TMS - Not used
5 AINSUBR I Microphone audio data (R-ch) input terminal
6 AINSUBL I Microphone audio data (L-ch) input terminal
7 VMIDADC - Not used
8 AINMAINR I Serial audio data (R-ch) input terminal
9 AINMAINL I Serial audio data (L-ch) input terminal
10 VDD28ADD - Power supply terminal (+2.8V)
11 VDD28D - Power supply terminal (+2.8V)
12 VSS28D - Ground terminal
13 DATAI2 - Not used
14 RESET_N I Reset signal input from the system controller
15 TRST - Not used
16 TEST1 - Not used
17 VDD28ADA - Power supply terminal (+2.8V)
18, 19
VSS28ADA, VS-
S28ADD
- Ground terminal
20 VDD28X - Power supply terminal (+2.8V)
21 VDD15D - Power supply terminal (+1.5V)
22 VSS15D - Ground terminal
23 TDO - Not used
24 TDI - Not used
25 TCK - Not used
26, 27 TEST3, TEST2 - Not used
28 STANDBY_N I Standby signal input from the system controller
29 OSCEN I Master clock oscillation stop setting terminal “L”: oscillation stop Fixed at “H” in this set
30 XfsoOUT O System clock output terminal (49.152 MHz)
31 VSS28X - Ground terminal
32 SUB - Not used
33 XfsoIN I System clock input terminal (49.152 MHz)
34 VCONTO O Control PWM signal output terminal for the PWM volume
35 VSS15D - Ground terminal
36 VDD15X - Power supply terminal (+1.5V)
37 VSS28PWM - Ground terminal
38 VREGO O Control DC voltage output terminal for the PWM volume
39 VDD15D - Power supply terminal (+1.5V)
40 VCONTI I Control DC voltage input terminal for the PWM volume
41 VDD28PWM - Power supply terminal (+2.8V)
42 VMIDDHP - Not used
43 X256fsoOUT - Not used
44 LRCK - Not used
45 I2CADDR - Not used
46 MCKSEL I Master clock setting terminal “L”: 1024 Fso, “H”: 512 Fso Fixed at “L” in this set
47 SCL I/O Serial data transfer clock signal input/output with the system controller
48 DATAO - Not used
49 GPIO0 I Communication control signal input terminal Not used
50 SDA I/O Serial data input/output with the system controller
51 GPIO2 O Error detection signal output to the system controller
52 GPIO1 O Communication control signal output to the system controller
53 VDD15D - Power supply terminal (+1.5V)
54, 55 GPIO4, GPIO3 - Not used
56 VDD28D - Power supply terminal (+2.8V)
57 VSS28D - Ground terminal
58 SUB - Not used
59 LINEINL I Serial audio data (L-ch) input terminal
Pin No. Pin Name I/O Description
60 AHPINR I Serial audio data (R-ch) input terminal
61 AHPINL I Serial audio data (L-ch) input terminal
62 PROTMON - Not used
63 VSS15PRI - Ground terminal
64 SHUTDOWN_N I Protection control signal input terminal “L”: protect on
65 VDD15PRI - Power supply terminal (+1.5V)
66 VDD28LINE - Power supply terminal (+2.8V)
67 VSS28LINE - Ground terminal
68 LINEINR I Serial audio data (R-ch) input terminal
69 LINEOUTL O Serial audio data (L-ch) output terminal
70 VDD28AHP - Power supply terminal (+2.8V)
71 AHPOUTL O Serial audio data (L-ch) output terminal
72 VSS15POR - Ground terminal
73, 74
VDD15POR,
VDD15POL
- Power supply terminal (+1.5V)
75 VSS15POL - Ground terminal
76 VMIDHPL - Not used
77 LINEOUTR O Serial audio data (R-ch) output terminal
78, 79
PREOUTR,
PREOUTL
- Not used
80 AHPOUTR O Serial audio data (R-ch) output terminal
81 VSS28AHP - Ground terminal
82, 83 OUTNR, OUTPR O Serial audio data (R-ch) output terminal
84, 85 OUTPL, OUTNL O Serial audio data (L-ch) output terminal