Sony CDX-C8850R Service Manual ▷ View online
33
Pin No.
Pin Name
I/O
Pin Description
80
FWE (L)
I
FLASH write enable input
81
RES
I
Reset input
82
NMI (H)
I
Non-maskable interruption input
83
STBY (H)
I
Hardware standby input
84
VCC
—
Power supply pin (+5 V)
85
XTAL
I
Main clock crystal input (18.432 MHz)
86
EXTAL
O
Main clock crystal output (18.432 MHz)
87
VSS
—
Ground
88
PF7
O
Not used. (Open)
89
VCC
—
Power supply pin (+5 V)
90 – 96
PF6 – 0
O
Not used. (Open)
97
UNI-SO
O
SONY BUS serial data output
98
UNI-SI
I
SONY BUS serial data input
99, 100
VSS
—
Ground
101
UNI-SCK
I
SONY BUS serial clock input
102
P53/ADTRG
O
Not used. (Open)
103
AVCC
—
A/D, D/A power supply pin (+5 V)
104
VREF
—
A/D, D/A reference voltage input (+5 V)
105
P40/AN0
I
Not used. (Connect to ground.)
106
P41/AN1
I
Not used. (Connect to ground.)
107
P42/AN2
I
Not used. (Connect to ground.)
108
P43/AN3
I
Not used. (Connect to ground.)
109
P44/AN4
I
Not used. (Connect to ground.)
110
P45/AN5
I
Not used. (Connect to ground.)
111
P46/AN6/DA0
I
Not used. (Connect to ground.)
112
P47/AN7/DA1
I
Not used. (Connect to ground.)
113
AVSS
—
A/D, D/A ground
114
VSS
—
Ground
115 – 122
P17 – 10
O
Not used. (Open)
123
MD0 (H)
I
Operation mode setting input (Fixed at “H”.)
124
MD1 (H)
I
Operation mode setting input (Fixed at “H”.)
125
MD2 (H)
I
Operation mode setting input (Fixed at “H”.)
126 – 128
PG0 – 2
O
Not used. (Open)
34
• IC500 MB90574APMT-G-215-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1, 2
RE IN0, 1
I
Rotary encoder input
3
TIR BUSY
I
TIR reception audio recording IC operation mode input (“H” : BUSY)
4
TIR PDOWN
O
TIR reception audio recording/playback IC operation mode setting output
5
TIR RST
O
TIR reception audio recording IC reset output
6
SYS RST
O
Reset output for SONY BUS slave micon.
7
BUS ON
O
SONY BUS ON output
8
VCC
—
Power supply pin (+5 V)
9
DSPSTP
O
Digital signal processor master clock control output
10
TIR PLAY
O
AM reception/TIR playback select output (“L” : TIR playback)
11
CSV PLAY
O
Voice guide sound/Digital signal processor sound select output
12
RX/FLS SI
I
FLASH write communication input
13
TX/FLS SO
O
FLASH write communication output
14
FLS WR
I
FLASH write mode select input
15
BEEP
O
Beep output
16
CSV ON
O
CSV control IC power supply control output
17
DSP SI
I
Serial data input from digital signal processor.
18
DSP SO
O
Serial data output to digital signal processor.
19
DSP CK
O
Serial data shift clock output to digital signal processor.
20
UNI SI
I
SONY BUS serial data input
21
UNI SO
O
SONY BUS serial data output
22
UNI CK
O
SONY BUS serial clock output
23
SD IN
I
Tuner reception signal detection input
24
SIRCS
I
Wireless remote commander signal input
25
CSV SI
I
CSV control IC serial data input
26
CSV SO
O
CSV control IC serial data output
27
CSV CK
O
CSV control IC serial clock output
28
DSP RST
O
Digital signal processor reset output
29
ST/MONO
I/O
Used in conjunction with stereo input/forced monaural output.
30
DSP XMST
O
Digital signal processor master mode/slave mode select output
31
WIDE
O
WIDE/NARROW select output
32
NARROW
O
WIDE/NARROW select output
33
VSS
—
Ground
34
C
—
Stabilized capacitor connection pin
35
RAM BU
I
RAM backup voltage detection input (Not used in this set.)
36
MUTE
O
Mute control output of audio output.
37
ASEL0
O
Digital signal processor analog input source select output
38
DVCC
—
D/A power supply pin (+5 V)
39
DVSS
—
D/A ground
40
ASEL1
O
Digital signal processor analog input source select output
41
LCD ANG
O
LCD contrast alignment output
42
AVCC
—
D/A, A/D power supply pin (+5 V)
43
AVRH
—
A/D reference voltage input (+5 V)
44
AVRL
—
A/D reference voltage input (0 V)
45
AVSS
—
D/A, A/D ground
46
VSM
I
Tuner S-Meter voltage input
47, 48
KEY IN0, 1
I
Front panel key input
49
RC IN0
I
Rotary commander key input
50
DST SEL0
I
Destination select input
51
DST SEL1
I
Destination select input
52
QUALITY
I
Tuner quality voltage input
53
MPT
I
Tuner multi pass voltage input
54
VCC
—
Power supply pin (+5 V)
35
Pin No.
Pin Name
I/O
Pin Description
55
VOL LOAD
O
Electronic volume IC data latch output
56
VOL DATA L
O
Electronic volume L-ch setting data output
57
VOL DATA R
O
Electronic volume R-ch setting data output
58
VOL CLK
O
Electronic volume setting clock output
59
DSP XLAT
O
Data latch output to digital signal processor.
60
RC IN1
I
Rotary commander shift switch input
61
ACC IN
I
Accessory signal input
62
POW ON
O
System power ON/OFF control output
63
VSS
—
Ground
64
BOOT
O
Low output at display micon rewriting.
65
PWM
I
PWM control input
66
NCO
—
Not used. (Open)
67
RDS DAVN
I
RDS IC data reception mode read input
68
CD/MD
I
CD/MD mechanism deck setting input (“L” : CD mechanism deck)
69
CD/MD ON
I
CD/MD servo B+ detection input
70
I2C SDA
I/O
For communication with device connected to I
2
C-bus.
71
I2C SCL
I/O
For communication with device connected to I
2
C-bus.
72
SHIFT
O
Shift signal output
73
X1A
O
Low speed frequency output (32.768 kHz)
74
X0A
I
Low speed frequency input (32.768 kHz)
75
NCO
—
Not used. (Open)
76
KEY ACK
I
Key input detection at micon sleeping.
77
BU IN
I
Back-up power supply detection input
78
SP LAT
O
Spectrum analyzer data latch output
79
DSP REDY
I
Ready signal input from digital signal processor.
80
TEST
I
Test input
81
EMPH
I
Emphasis signal input at MD/CD play. (“H” : emphasis ON)
82
WAKE UP
O
DC/DC converter power supply ON/OFF control output (Not used in this set.)
83
TEL MUTE
I
Audio signal muting input (“L” : mute ON)
84
TU ON
O
Tuner power supply ON/OFF output
85
ILL IN
I
Illumination signal input
86
HSTX
I
Hardware standby input
87
MD2
I
Operation mode designation input (Fixed at “L” in this set.)
88, 89
MD1, 0
I
Operation mode designation input (Fixed at “H” in this set.)
90
RST
I
Reset input
91
VSS
—
Ground
92
X0
I
High speed frequency input (3.58 MHz)
93
X1
O
High speed frequency output (3.58 MHz)
94
VCC
—
Power supply pin (+5 V)
95
DOOR IND
O
Front panel door indicator output
96
DSP ON
O
Digital signal processor power control output
97
NCO
—
Not used. (Open)
98
AMP-STBY
O
Power amplifier standby signal output
99 – 102
TIR D0 – 3
I/O
Parallel translation data line input from/output to TIR reception audio record/
playback IC.
103
TIR RD
O
Read pulse output to TIR reception audio recording/playback IC.
104
TIR WR
O
Write pulse output to TIR reception audio recording/playback IC.
105
TIR CE1
O
Chip enable output to TIR reception audio recording/playback IC.
106
TIR CE0
O
Chip enable output to TIR reception audio recording/playback IC.
107
AD ON
O
Power control output to keys.
108
NCO
—
Not used. (Open)
109
NOSE SW
I
Front panel attachment detection input
110
CSV REQ
I
Data transfer request input from CSV control IC.
36
Pin No.
Pin Name
I/O
Pin Description
111
CSV CE
O
Chip enable output to CSV control IC.
112
CSV RST
O
CSV control IC initial reset output
113
NCO
—
Not used. (Open)
114
FM ON
O
Power control output at FM reception.
115
DOOR SW
I
Door switch input
116
NS MASK
O
Mask control output of quality input at tuner reception.
117
SEEK
O
Seek control output at tuner reception.
118
AF MUTE
O
Muting output of tuner audio output.
119
VSS
—
Ground
120
SSTOP
I
IF count result input of PLL IC.
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