93
XR-A550MD
No.
Pin Name
I/O
Function
No.
Pin Name
I/O
Function
1
CD RESET
O
Reset output for CD LSI
51
VFDP
−
2
CD CE
O
Strobe output for CD LSI
52
S05
O
FL display control segment
3
CD DRF
I
RF level detection input
53
S06
4
S.DATA OUT
O
System bus data output
54
S07
5
EXP CLK
O
Clock output for EXP IC (BU4094BCF)
55
S08
6
EXP DATA
O
Data output for EXP IC (BU4094BCF)
56
S09
7
EXP CE
O
Strobe output for EXP IC (BU4094BCF)
57
S10
8
LED1
O
LED1 control
58
S11
9
LED2
O
LED2 control
59
S12
10
LED3
O
LED3 control
60
S13
11
AC
I
AC pulse input for power supply monitor
61
S14
12
XRESET
I
CPU reset input
62
S15
13
REEL1
I
Pulse input for deck reel
63
CLAMP/S16
I/O
14
I
Pull down
64
OPEN/S17
15
VSS
−
65
INSIDE/S18
16
CF1
I
66
DISC123/S19
17
CF2
O
67
ARR/S20
18
VDD
−
68
ARF/S21
19
KEY1
I
Front key input 1
69
MODE1/S22
20
MS
I
DECK MS signal input
70
S23
O
21 ST/TUNE
I
TUNER TUNED (STEREO) detection
71
HALF1/S24
I/O
22
I
Pull down
72
VDD
−
Power supply
23 S.REQ
I/O System bus request input/output
73
S25
O
FL display control segment
24
KEY2
I
Front key input 2
74
CrO2_1/S26
I/O
25
SPE-IN
I
Spectram analizer signal input
75
S27
O
26
KEY3
I
Front key input 3
76
SCAN ON
O
Key scan input control
27
CD WRQ
I
Q data OK signal input of CD sub code
77
S.CLK
O
System bus clock output
28
RDS CLK
I
Clock input (BU1923) for RDS IC
78
SOL1
O
Deck solenoid control
29
REMOCON
I
Remote control signal input
79
MOTOR
O
Deck motor control
30
G01
80
RDSDATA
I
Data input for RDS
31 G02
81
VOLJOG1
I
Pulse input for Volume JOG
82
VOLJOG2
83
PLL CE
O
TUNER PLL IC strobe output
84
XMDRESET
O
Reset output for MD system microcomputer
85
EVOL CE
O
Main volume control IC strobe output
86
POWER
O
Main power control
87
LINE MUTE
O
Line mute control
88
LED CE
O
LED control for timer
89
VSS
−
GND
90
VDD
−
Power supply
41 G12
91
S.DATA IN
I
System bus data input
42 G13
92
I
Pull down
43 G14
93
MORP JOG1
I
Pulse input for Sound Morphing JOG
44
94
MORP JOG2
45
95
SYSDATA
O
Serial data output
46
VDD
−
Power supply
96
TXDATA
I
Serial data input
47
D1/S01
I/O
FL display control segment
97
SYS CLK
O
Serial clock output
48
D2/S02
I/O
98
CD DATA
O
Serial data output for CD LSI
49
S03
O
99
SQ OUT
I
Serial data (Q data) input for CD LSI
50
S04
O
100 CD CLK
O
Serial clock output for LSI
PDC055A (DISPLAY ASSY : IC5501)
• System Control Microcomputer
•
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