RXD-803/803E/853/853E/A83
CIRCUIT DESCRIPTION
10
Pin No. Pin Name
I/O
Description
1
SI
I
NO USED
2
A-PLAY
I
A DECK Head Position Detection Switch Input
H = OFF
L = ON
3
B-PACK
I
B DECK Cassette Tape Detection Switch Input
L = ON
H = OFF
4
R-REC
I
B DECK Reverse Recording prohibition Detection Switch Input
H = prohibit
L = permit
5
B-PLAY
I
B DECK Head Position Detection Switch Input
L = ON
H = OFF
6
CK INH
I
NO USED
7
PSCLK
I
CLOCK INPUT
8
GND
-
GND
9
CLR
I
CONNECTED TO VDD
10
A-CrO2
I
A DECK CrO2 Detection Switch Input
H = CrO2
L = Normal
11
B-CrO2
I
B DECK CrO2 Detection Switch Input
H = CrO2
L = Normal
12
F-REC
I
B DECK Forward Recording prohibition Detection Switch Input
H = prohibit
L = permit
13
PSDATA
O
DATA OUTPUT
14
A-PACK
I
A DECK Cassette Tape Detection Switch Input
L = ON
H = OFF
15
PSLOAD
I
SHIFT/LOAD CONTROL
16
Vdd
-
VDD
4-4 Description of expander IC
TC74HC166AP(X13,IC15)
Pin No. Pin Name
I/O
Description
1
Vss
-
GND
2
DATA
I
DATA INPUT
TERMINAL
3
CLK
I
CLOCK INPUT
4
BIAS
O
NC
5
NOR
O
DECK Normal/CrO2 Changeover Control
H=Normal
L=CrO2
6
B SOL
O
NC
7
A SOL
O
NC
8
CPM
O
NC
9
LMUTE
O
DECK Line Mute Control
H= MUTE OFF L= MUTE ON
10
B-EQ
O
B DECK Play Back Equalizer Control
11
R MUTE
O
DECK Recording Mute Control
12
A-EQ
O
A DECK Play Back Equalizer Control
13
A/B
O
DECK A/B Changeover Control
L=A DECK
H=B DECK
14
R/P
O
NC
15
BEAT.C
O
DECK Beat Cancel On/Off Changeover Control
H= ON
L= OFF
16
Vdd
-
POWER 5V)
BU2090F(X13,IC16)
