Sony CDX-L490EE, Руководство по обслуживанию

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13
CDX-L490EE
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTION
• IC501 MN101C49KSN (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 VREF– — A/D converter power supply (–) pin
2 VSM I S-meter voltage detection input
3 NIL I Not used. (Fixed at L in this set)
4, 5 KEYIN1, 0 I Key input 1, 0
6 RCIN0 I Rotary commander key input
7 – 9 NIL I Not used. (Fixed at L in this set)
10 VREF+ — A/D converter power supply (+) pin (+5 V)
11 VDD — Power supply pin (+5 V)
12 OSCOUT O Main clock output (18.432 MHz)
13 OSCIN I Main clock input (18.432 MHz)
14 VSS — Ground
15 XIN I Sub clock input (32.768 kHz)
16 XOUT O Sub clock output (32.768 kHz)
17 MMOD I Not used. (Fixed at L in this set)
18 LCDSO O Serial data output for LCD driver IC.
19 LCDCE O Chip enable output for LCD driver IC.
20 LCDCKO O Serial clock output for LCD driver IC.
21 CD_TSO O Serial data output for CD servo IC.
22 CD_TSI I Serial data input from CD servo IC.
23 CD_TCKO O Serial clock output for CD servo IC.
24 SYSRST O Not used. (Fixed at H in this set)
25 BUSON O Not used. (Fixed at H in this set)
26 KEYACK I Key acknowledge detection input
27 NIL I Not used. (Fixed at L in this set)
28 BUIN I Backup power supply input
29 SIRCS I SIRCS input
30 TU_ATTIN I Tuner attenuator control input
31 CD_PACK I CD text pack synchronization signal input from CD servo IC.
32 NC (VCC) — Power supply pin (+5 V)
33 RESET I Microcomputer reset input
34 NOSE-SW I Not used. (Fixed at H in this set)
35 BEEP O Beep output
36 NC O Not used. (Open)
37 TESTIN I Test mode detection input
38 ACCIN I Accessory power supply detection input
39 NC O Not used. (Open)
40 TELATT I Telephone attenuator detection input
41 NC (VCC) I Not used. (Fixed at H in this set)
42 UNISO O Not used. (Open)
43 UNISI I Not used. (Fixed at L in this set)
44 UNICKO O Not used. (Fixed at L in this set)
45 I2C_SIO I/O I 2 C BUS serial data input/output
46 NC O Not used. (Open)
47 I2C_CKO O I
2
C BUS serial clock output
48, 49 NC O Not used. (Open)
50 CD_SELFSW I CD mechanism deck Self switch detection input
51 TSTB O CD text parameter strobe output for CD servo IC.
52 RFOK I RFOK signal input from CD servo IC.
53 CD_RST O Reset signal output for CD servo IC.
54 A0 O Command/parameter discrimination signal output for CD servo IC.
55 STB O Data strobe signal output for CD servo IC.
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