RXD-M33/M33MD
9
CIRCUIT DESCRIPTION
Used for RXD-M33MD only.
Port No.
Port Name
I/O
Description
ACTIVE
H
L
36
SLT SW
I
CD start limit switch input.
37
XRST
O
CD DSP reset output.
RESET
38
OP SW
I
Input port of open switch for CD tray.
39,40
NC
-
Unused.
41
VPP
I
Microcomputer power supply (+5v).
42
MDATA
O
CD DSP command data output.
43
STAT
I
CD DSP status signal input.
44
MCLK
O
CD DSP command clock signal output.
45
MLD
O
CD DSP command load signal output.
46
SUBQ
I
CD sub code input.
47
SQCK
O
Clock output for CD sub code.
48
EEP SDA
-
Unused.
49
EEP SCL
-
Unused.
50
HP IN
I
Detection port for headphones jack.
51
OPEN
O
Control port of CD tray motor.
52
CLOSE
O
Control port of CD tray motor.
53
MD CE
I
Detection port for MD back up.
54
MD RST
I
Reset output from MD mechanism.
55
INI MD SW
-
Unused.
56
BACK CHK
-
Unused.
57
BACK ON
-
Unused.
58
MD IN SW
I
Load switch input for MD disc.
59
NC
-
Unused.
60
PLAY SW
I
Detection switch input of head position for deck.
61
CrO2 SW
I
Detection switch input of CrO2 tape for deck.
62
HALF SW
I
Cassette half switch input.
63
REC F SW
I
Deck forward recording switch input.
OFF
ON
64
CPM
O
Control port of capstan motor for deck.
65
REC R SW
I
Deck reverse recording switch input.
OFF
ON
66
SOL
O
Control port of solenoid for deck.
67
LMUTE
O
Deck lien mute control.
ON
68
A/B-1
O
Deck recording mute & head select control 1.
69
A/B-2
O
Deck recording mute & head select control 2.
70
B
ø
/
¿
O
Control port of recording equalizer for deck.
71
NOR
O
Switching port of bias (NOR/CrO2) for deck.
72
BIAS
O
Control port of bias on/off for deck.
ON
OFF
73
R/P
O
Deck recording & playback changeover.
RECORDING PLAYBACK
74
BEAT C
O
On/off control port of beat cancel for deck.
ON
OFF
75
NC
-
Unused.
76
EVCLK
O
Sound controller clock output.
77
EVDATA
O
Sound controller data output.
78~80
NC
-
Unused.
81
LED STBY GRN
O
Standby led (green) control port.
OFF
ON
82
LED STBY RED
O
Standby led (red) control port.
OFF
ON
83,84
NC
-
Unused.
85
CD POWER
O
CD DSP power on/off changeover control.
ON
OFF
86
SP RLY
O
On/off control port for speaker relay.
87
AMUTE
O
Audio mute output.
88
POWER
O
Power relay control.
89
PROTECTION
I
Detection port for power supply protection.
90
RDS DATA
I
RDS data input. (RDS version only)
91
TU MUTE
O
Tuner mute control.
92
EMPHASIS
-
Unused.
93
ST
I
Stereo detector input.
94
SD
I
SD detector input.
95
GND
-
Connected to ground.
96
PLL DATA
O
PLL IC data output.
97
PLL CLK
O
PLL IC clock output.
98
PLL DO
I
PLL IC data input.
99
PLL CE
O
PLL IC chip enable output.
100
DAVDD
I
D/A converter positive voltage.
4-2 Port Description of Microprocessor
