8
KDC-348U/4751SD/BT41U/BT648U
/U4549/U4549SD/U549BT/X395/X695
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
81
MUTE AFS
I/O AFS mute
L: Mute ON (Time constant solo setting: 0.5ms),
Hi-Z: Normal
82
PWIC MUTE
O
Power IC mute
STANDBY source or momentary power down: L,
TEL mute: L
83
PWIC STBY
O
Power IC standby control
POWER ON: H, POWER OFF: L
84
PWIC DC ERR
I
Detection of power IC’s +B and GND short-
circuited
85
LX DATA M
O
Data to slave unit
SIO mode transmission
86
LX DATA S
I
Data from slave unit
SIO mode reception
87
LX CLK
I/O LX-BUS clock
SIO mode clock (125kHz or 107kHz)
88
NC
-
Not used
Output L
fi
xed
89
DVCC3
-
Power supply
90
DVSS
-
GND
91
SW DIO
-
For on-board writing
92
SW CLK
-
For on-board writing
93
TRACE CLK
-
For debug
94
TRACE DATA 0
-
For debug
95
TRACE DATA 1
-
For debug
96
TRACE DATA 2
-
For debug
97
TRACE DATA 3
-
For debug
98
AUD SDA
I/O I2C data input/output (E-VOL IC control)
Communication with E2PROM for system
μ
-COM data keeping
99
AUD SCL
O
I2C clock input/output (E-VOL IC control)
Communication with E2PROM for system
μ
-COM data keeping
100
LX RST
O
Forced reset to slave unit
H: Reset, L: Normal
101
LX MUTE
I
Mute request from slave unit
H: Mute ON, L: Mute OFF
102
LX REQ M
O
Communication request to slave unit
103
LX CON
O
Start-up request to slave unit
H: Slave unit ON, L: Slave unit OFF
104
USB PON
O
USB P.ON output
H: ON, L: OFF
105
USB OC
I
USB over-current detection
L: Detected, H: Normal
106
NC
-
Not used
Output L
fi
xed
107
MUTE PRE
O
External preout mute
O-bit or momentary power down: L, L: Mute ON
108
MUTE PRE SW
O
External preout mute (SUB)
O-bit or momentary power down: L, L: Mute ON
109
LX REQ S
I
Communication request from slave unit
For external interrupt
110
TUN SDA
I/O I2C data input/output (Tuner IC control)
111
TUN SCL
O
I2C clock output (Tuner IC control)
I2C clock frequency: 200kHz
112
REMO
I
Input signal of remote control reception and
wired remote control
Pulse width detection
113
REMO
I
Remote control signal input
Even pin No.112 is being short-circuited, input
signal can be ignored in software
114
REG VCC3
-
Power supply
115
XT1
I
Low frequency resonator connection
Sub clock: 32.768kHz
116
XT2
O
Low frequency resonator connection
Sub clock: 32.768kHz
117
CVCC3
-
Power supply
118
X1
I
High frequency resonator connection
Main clock: 12MHz
119
CVSS
-
GND
MICROCOMPUTER’S TERMINAL DESCRIPTION
