Port No.
Port Name
I/O
Function
1
VDD
-
POWER 5V)
2
-20dB ATT
O
-20dB ATTENUATION
3
NO USE/DSA STB
-
GND
4
T BIAS
O
DECK BIAS CONTROL
5
T T1/T2
O
DECK T1/T2 CHANGE OVER
6
REC/PLAY
O
DECK RECORDING/PLAYBACK CHANGE OVER
7
RES OUT
O
CD DSP REQUEST
8
DRF
I
CDRF LEVEL DETECTION
9
WRQ
I
CD DSP WRITE REQUEST
10
REQUEST
I
RESET SIGNAL INPUT
11
X2
O
MAIN CLOCK OUTPUT
12
X1
I
MAIN CLOCK INPUT
13
VPP/IC
-
GND
14
XT2
-
OPEN
15
SPN
-
OPEN
16
VDD
-
POWER 5V)
17
CD CLK
O
CD DSP CLOCK
18
CD DI
O
CD DSP COMMAND
19
CD DO
I
CD DSP CODE Q INPUT
20
CD CE
O
CD DSP CE OUTPUT
21
CE
O
CHIP ENABLE OUTPUT
22
CLK
O
CLOCK OUTPUT
23
DI
O
DATA OUTPUT
24
DO
I
DATA INPUT
25
AVSS
-
GND
26
O/C SW/DSA DATA
I
CD OPEN CLOSE SWITCH INPUT
27
NO USE/DSA ACK
/TUN SM
I
TUNER SIGNAL METER INPUT
28
SPEANA 2
I
SPEANA DATA INPUT(16kHz)
29
SPEANA 1
I
SPEANA DATA INPUT(1kHz)
30
SPEANA 0
I
SPEANA DATA INPUT(63kHz)
31~33
KEY2~KEY0
I
KEY INPUT
34
AVDD
-
ANALOG POWER SUPPLY
35
AVREF
-
ANALOG REFERENCE VOLTAGE
36
P IN
I
POWER FAILURE DETECTION
37,38
JOG1,0
I
JOG VOLUME INPUT 1, 0
39
REMOCON
I
REMOTE CONTROL SIGNAL INPUT
40
VSS
-
GND
41
SMUTE
O
SYSTEM MUTE CONTROL
42
T SOL B
O
DECK2 SOLENOID CONTROL
43
T SOL A
O
DECK1 SOLENOID CONTROL
44
T MOTOR
O
DECK MOTOR CONTROL
45
TIMER LED
O
TIMER LED CONTROL
46
VDD
-
POWER 5V)
47
AC RLY CONT.
O
AC RELAY CONTROL
48
SP RLY
O
SPEAKER OUTPUT RELAY CONTROL
49
SP DET
I
SPEAKER OUTPUT DETECTION
50
T1 RUN
I
DECK1 REEL SENSOR DETECTION PORT
51
T2 RUN
I
DECK2 REEL SENSOR DETECTION PORT
52
CD CLAMP SW
I
CD CHANGER CLAMP SWITCH INPUT
53
PLAY SW A
I
DECK PLAY SWITCH A INPUT
54
PLAY SW B
I
DECK PLAY SWITCH B INPUT
55
FPA
I
DECK FORWARD RECORDING SWITCH INPUT
1. Port Description of Microprocessor
RXD-655/755
10
CIRCUIT DESCRIPTION
