KRC-165
4
●
Terminal Description (IC1 : X14-6860-20)
Pin No.
Pin name
I/O
Description
Processing Operation
1
I
N.C. (Not used)
2
VL1
I
Positive power supply connection terminal 1
for LCD driver
3
KI0
I
Key return input 0
4
KI1
I
Key return input 1
5
KI2
I
Key return input 2
6
KS0
O
Key scan output 0
7
KS1
O
Key scan output 1
8
KS2
O
Key scan output 2
9
KS3
O
Key scan output 3
10
S METER
I
S-meter input from the F/E
11
KS4
O
Key scan output 4
12
BEEP
O
BEEP sound output
13
O
N.C. (Not used)
14
MOTOR
O
Cassette motor on/off output
Hi : Motor ON
15
FF/REW
I
FF/REW detection input
Lo : FF/REW, Hi : PLAY
16
PACK IN
I
Cassette tape Pack-in detection input
Lo : Pack-in
17
KI3
I
Key return input 3
18
FWD/REV
I
FWD/REV mode detection input
Lo : REV mode
19-25
O
N.C. (Not used)
26
SD
I
SD input from the F/E
Hi : Station detected
27
PLL CLK
O
Clock output to the F/E
28
PLL DATA
I/O
Data input/output with the F/E
29
IFC
I
N.C. (Not used)
30
AM+B
O
AM+B ON/OFF output
Hi : during AM reception
31
FM+B
O
FM+B ON/OFF output
Hi : during FM reception
32
SCK
O
Clock output to the E-VOL. IC
33
SDA
I/O
Data input/output with the E-VOL. IC
34
O
Pull down to GND lines. (Not used)
35
RESET
I
RESET input
Lo : System reset
36,37
O
N.C. (Not used)
38
XIN
-
Main clock resonator connection terminal
39
XOUT
-
Main clock resonator connection terminal
40
VSS
-
Ground connection terminal
Connected to GND lines.
41
IC2 Type 1
I
Constant select terminal 1
Pull down to GND lines.
42
IC2 Type 2
I
Constant select terminal 2
Pull down to GND lines.
43
O
N.C. (Not used)
44
SEL1
I
Destination select terminal 1
KRC-165 : (SEL1, SEL2)=(Lo, Hi)
45
SEL2
I
Destination select terminal 2
RX-290 : (SEL1, SEL2)=(Hi, Lo)
46
MUTE
O
Audio mute on/off output
Hi : Mute ON
47
STBY
O
Power IC standby control output
Hi : POWER ON mode
When the momentary power down, after
48
SVR
O
Power IC reset terminal
ACC ON/OFF is detected and after POWER OFF,
the output becomes Hi temporarily.
49
ACC DET
I
ACC detection input
Hi : ACC OFF
Hi : When momentary power down detected
50
B.U. DET
I
Momentary power down detection input
or B.U. OFF
Lo : B.U. ON
MICROCOMPUTER'S TERMINAL DESCRIPTION
