Sony CDX-C90 Service Manual ▷ View online
– 53 –
Pin No.
Pin Name
I/O
Pin Description
54
VCC
—
Power supply pin (+5 V)
55
RAMBU
I
RAM reset detection input
56
TESTIN
I
Test mode setting detection input
57
AD ON
O
Power control output of A/D conversion.
58, 59
RE IN0, 1
I
Rotary encoder input 0, 1
60
BOOT
I
Compulsory boot mode input
61
DIMMER
O
Dimmer control output
62
TIR IND
O
TIR indicator control output (Not used in this set.)
63
GND
—
GND
64
SYSRST
O
System reset output
65, 66
NCO
—
Not used.
67
EEDATA
I/O
EEPROM serial data input/output
68
EECLK
O
EEPROM serial clock output
69
NCO
—
Not used.
70
RDSSI
I
RDS serial clock input (Not used in this set.)
71
RDSCKO
I
RDS serial data input (Not used in this set.)
72
DAVN
I
RDS IC data taking in detection input (Not used in this set.)
73
X0A
—
Low speed oscillation input (32.768 kHz)
74
X0B
—
Low speed oscillation input (32.768 kHz)
75
RC IN1
I
Rotary commander input
76
BU IN
I
Back-up power detection input
77
KEY ACK
I
Key input acknowledge
78
ILLIN
I
Illumination line detection input
79
TEL ATT
I
Telephone mute detection input
80
NCO
—
Not used.
81
ACC IN
I
Accessory power detection input
82
EMPH I
I
Emphasis input
83
FP CLOSE
I
Front panel close detection input
84
FP OPEN
O
Front panel open control output
85
BOOT DP
O
Display controller boot mode control output
86
HSTX
—
Connect to power supply pin.
87
MD2
—
Connect to GND.
88, 89
MD0, 1
—
Connect to power supply pin.
90
RESET
I
Microcomputer reset input
91
VSS
—
GND
92
X0
—
High speed oscillation input (3.68 MHz)
93
X1
—
High speed oscillation input (3.68 MHz)
94
VCC
—
Power supply pin (+5 V)
95
TIMPOL
O
Time poling setting (Fixed at “H” in this set.)
96
PW ON
O
System power control output
97
ILL ON
O
Illumination power control output
98
DIRECT
O
Direct volume control output
99
ATT
O
System mute control output
100
ANTREM
O
Antenna remote control output
101
VOLCE0
O
Input selector/tone/sub volume serial chip enable output
102
VOLCE1
O
Electric volume serial chip enable output (L-CH)
103
VOLCE2
O
Electric volume serial chip enable output (R-CH)
104
VOLCKO
O
Volume serial clock output
105
VOLSO
O
Volume serial data output
106
ENC+
I
Rotary commander and encoder input (+)
107
ENC–
I
Rotary commander and encoder input (–)
108
FM ON
O
FM ON control output
109
AM ON
O
AM ON control output
– 54 –
Pin No.
Pin Name
I/O
Pin Description
110
SEEKOUT
O
SEEK OUT output
111
AM STIN
I
AM stereo input (Not used in this set.)
112
FM STIN
I/O
Used in conjunction with stereo input/monaural output (FM mode)
113
SD IN
I
Signal detector input
114
TU ATT
O
Tuner mute output (Not used in this set.)
115
TIR D0
I/O
TIR IC data 0 input/output (Not used in this set.)
116
TIR D1
I/O
TIR IC data 1 input/output (Not used in this set.)
117
TIR D2
I/O
TIR IC data 2 input/output (Not used in this set.)
118
TIR D3
I/O
TIR IC data 3 input/output (Not used in this set.)
119
VSS
—
GND
120
TIRPLAY
O
TIR IC play mode audio select control output (Not used in this set.)
– 55 –
• IC500 HD6413002F16 (DISPLAY CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
VDD
—
Power supply pin (+5 V)
2
SIRCS
I
Remote commander input
3
SIRCS
I
Remote commander input
4
LCD-RST
O
LCD controller reset control output
5
ILL ON
O
LCD controller power supply control output
6
EL ON
O
LCD back light EL power supply control output
7
LCD-ST
O
LCD controller information start request signal output
8
CS-CTL
O
SRAM master chip enable control output
9
BOOTI
I
Compulsory boot mode input
10
(RESO)
O
Connect to GND.
11
VSS
O
GND
12
LCD-SO
O
LCD controller serial data output
13
UNI-SO
O
BUS interface data output
14
LCD-RX
I
LCD controller serial data input
15
UNI-SI
I
BUS interface data input
16
UNI-CO
O
LCD controller serial clock ouput
17
UNI-CI
I
LCD controller serial clock input
18 – 21
D0 – D3
I/O
External RAM, ROM data bus input/output
22
VSS
—
GND
23 – 34
D4 – D15
I/O
External RAM, ROM data bus input/output
35
VDD
—
Power supply pin (+5 V)
36 – 43
A0 – A7
O
External RAM, ROM address bus output
44
VSS
—
GND
45 – 56
A8 – A19
O
External RAM, ROM address bus output
57
VSS
—
GND
58
WAIT
O
Not used.
59
(P61)
—
Not used.
60
(P62)
—
Not used.
61
NC
—
Not used.
62
STBY
I
Hardware standby input (Fixed at “H”.)
63
SYSRST
I
Reset input
64
BU-IN
I
Back-up power detection input
65
VSS
—
GND
66
EXTAL
O
Oscillation output (14.74 MHz)
67
XTAL
I
Oscillation input (14.74 MHz)
68
VDD
—
Power supply pin (+5 V)
69
AS
—
Not used.
70
RD
O
Read signal output
71
HWR
O
High write signal output
72
LWR
O
Low write signal output
73
MD0
I
Microcomputer oparation mode input (Fixed at “L”.)
74
MD1
I
Microcomputer oparation mode input (Fixed at “L”.)
75
MD2
I
Microcomputer oparation mode input (Fixed at “H”.)
76
AVDD
I
A/D converter power supply input
77
VREF
I
A/D converter reference voltage input
78 – 83
(AN0 – AN5)
—
Connect to GND.
84
BU-IN
I
Back-up power detection input
85
PBS
I
Parking brake input
86
AVSS
—
A/D converter GND
87
BUS-ON
I
BUS-interface BUS-ON input
88
SRAM-CS
O
SRAM chip enable output
89
DEC-CS
O
Demodulator LSI chip enable output (Not used in this set.)
– 56 –
Pin No.
Pin Name
I/O
Pin Description
90
DEC-INT
O
Demodulator LSI initial output (Not used in this set.)
91
ROM-CS
O
PROM chip enable output
92
VSS
—
GND
93
UNI-REQ
O
Not used.
94
LINK-OFF
O
BUS interface link output
95
DEC-ON
O
Not used.
96
DEC-CLR
O
Demodulator LSI reset output (Not used in this set.)
97 – 99
A21 – A23
O
Not used.
100
A20
O
External RAM, ROM address bus output
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