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Extracted text from sony cdx c 6850 service manual (Ocr-read)
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4-1. IC PIN DESCRIPTION
¥ IC801 MB90574PFV-G-179-BND (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 LD ON O Laser ON/OFF control output
2 FOK I Focus OK signal detection input
3 XLAT25 O CD signal processing latch output
4 DATA25 O CD signal serial data output
5 XRST O Reset output to CD signal processor IC.
6 GFS I GFS signal detection input
7 NIL Ñ Not used. (Connect to ground in this set.)
8 VCC Ñ Power supply pin (+5 V)
9 Ð 11 NIL Ñ Not used. (Open)
12 FLS SI/NOSE1 I Front panel attachment detection input
13 LCD SO/FLS SO O LCD serial data output
14 LCD CKO O LCD serial clock output
15 BEEP O BEEP output
16 NIL Ñ Not used. (Open)
17 SQ SI I Sub Q data input
18 NIL Ñ Not used. (Connect to ground in this set.)
19 SQ CKO O Sub Q read clock output
20 UNI SI I BUS system serial interface input
21 UNI SO O BUS system serial interface output
22 UNI CK I/O BUS system serial clock input/output
23 C IN I Track jump No. count input
24 SIRCS I Remote commander input
25 TXT SI I CD-TEXT data input
26 NIL Ñ Not used. (Connect to ground in this set.)
27 TXT CKO O CD-TEXT data read clock output
28 CLOK25 O CD signal processing serial clock output
29 SYSRST O System reset output
30 DEEMPH O De-emphasis output
31 AMP ATT O Power amplifier attenuator control output
32 MD ON O CD mechanism power control output
33 VSS Ñ Ground
34 C Ñ Power stabilization capacitor pin
35 CD ON O CD power control output
36 BUS ON O BUS ON control output
37 AD ON O Power control output of A/D conversion.
38 DVCC Ñ VREF input of D/A converter.
39 DVSS Ñ Ground of D/A converter.
40 NIL Ñ Not used. (Open)
41 ANGLE O LCD view angle alignment output (Not used in this set.)
42 AVCC Ñ Analog power supply pin (+5 V)
43 AVRH Ñ VREF + input of A/D converter.
44 AVRL Ñ VREF Ð input of A/D converter.
45 AVSS Ñ Analog ground
46 Ð 48 KEY IN0 Ð 2 I Key input 0 Ð 2
49 RC IN0 I Rotary commander input 0
50 QUALITY I Not used in this set.
51 NIL Ñ Not used. (Connect to ground in this set.)
52 MPDH I Tuner multi path input (Not used in this set.)
53 S-METER I S-meter voltage detection input
54 VCC Ñ Power supply pin (+5 V)
55 NS MASK O Not used in this set.
SECTION 4
DIAGRAMS
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Pin No. Pin Name I/O Pin Description
56 AMP ON O Power amplifier power control output
57 TXT ON O Reset output to CD-TEXT decoder IC.
58 VOL ATT O Electric volume mute control output
59 NIL Ñ Not used. (Open)
60 ATT O System attenuate control output
61 RC IN1 I Rotary commander shift key input 1
62 TU ATT O Tuner attenuate output (Not used in this set.)
63 VSS Ñ Ground
64 NIL Ñ Not used. (Open)
65 SSTOP I IF counter result signal detection input of PLL.
66 TEST I Test mode initial setting detection input
67 DAVN I RDS IC data acquisition detection input (Fixed at ÒLÓ in this set.)
68 FM ON/AM ON O FM ON output
69 TU ON O Tuner power control output
70 SDA I/O I 2C BUS serial data input/output
71 SCL O I 2C BUS serial clock output
72 NOSE2 I Front panel OPEN detection input (Not used in this set.)
73 X1A O Sub ceramic oscillator output (32 kHz)
74 X0A I Sub ceramic oscillator input (32 kHz)
75 SCOR I SCOR signal detection input
76 BU IN I Backup power detection input
77 DQSY I CD-TEXT data setting completion signal detection input
78 CD SENS I CD SENS signal detection input
79 KEY ACK I Key input acknowledge
80 TEL ATT I Telephone attenuate detection input
81 ST/MONO I/O Tuner stereo signal detection input/forced monaural output
82 SEEKOUT O SEEK output
83 SD IN I Signal detector input
84 WIDE O WIDE/NARROW select output (Not used in this set.)
85 NARROW O WIDE/NARROW select output (Not used in this set.)
86 HSTX Ñ Hardware standby input (Connect to pin (¼ (RESET).)
87 MD2 Ñ Operation mode input (Connect to ground in this set.)
88, 89 MD1, 0 Ñ Operation mode input (Connect to VCC in this set.)
90 RESET I Reset input
91 VSS Ñ Ground
92 X0 I Main ceramic oscillator input (4.19 MHz)
93 X1 O Main ceramic oscillator output (4.19 MHz)
94 VCC Ñ Power supply pin (+5 V)
95 COM8V ON O COM 8V control output
96 NIL Ñ Not used. (Open)
97 AREA1 I Destination select input 1 (Fixed at ÒLÓ in this set.)
98 AREA2 I Destination select input 2 (Fixed at ÒLÓ in this set.)
99 AREA3 I Destination select input 3 (Fixed at ÒHÓ in this set.)
100 BAND I Not used in this set.
101 ACC IN I Accessory power detection input
102, 103 PH3, 2 I Disc insertion detection photo sensor input (Not used in this set.)
104 LCD CE O LCD chip enable output
105 FLS W I Flash write input (Fixed at ÒHÓ in this set.)
106, 107 RE IN0, 1 I Rotary encoder input
108 ILL ON O Illumination power control output
109 PW ON O System power control output
110 NIL Ñ Not used. (Open)
111 ANT REM O ANT REMOTE power control output
