TK-280
52
TERMINAL FUNCTION
CN1
1
B
O
Power input after passing through
the fuse.
2
B
O
Power input after passing through
the fuse.
3
SB
I
Power output after power switch.
4
SB
I
Power output after power switch.
5
5M
O
5V.
6
VOL
I
V o l u m e l e v e l i n p u t f o r a u d i o
control.
7
E
-
GND
8
EN2
I
Encoder pulse input.
9
E
-
GND
10
EN1
I
Encoder pulse input.
CN2
1
MON
I
N o r m a l l y ; 5 V . M O N w h e n
for X54-
connected GND.
SW
2
LAMP
I
N o r m a l l y ; 5 V . L A M P w h e n
section
connected GND.
3
PTT
I
N o r m a l l y ; 5 V . t r a n s m i t w h e n
connected GND.
4
GND
-
GND
CN3
1
AF
O
Audio output.
2
AFE
-
Audio GND.
for
3
NC
-
Not use.
X54-
4
PF
I
External PF signal input.
Display
5
CK
O
Clock data output.
unit
6
RXD
I
Serial control signal input.
7
TXD
O
Serial control signal output.
8
DT
O
Data output for LCD driver/decade
counter.
9
KRS
O
Key scan IC reset output.
10
KI1
I
KEY input
11
KI2
I
KEY input
12
GND
-
GND
13
5M
O
5V.
14
AM
O
Audio mute signal output.
Mute: “L”. Unmute: “H”
15
CS
O
LCD driver chip select output.
16
NC
-
Not use.
17
PTT
I
PTT signal input.
18
AUX
I
AUX key input.
19
LR
O
TX LED control. Normally: 0V,
lighting: 5V.
20
LG
O
RX LED control. Normally: 0V,
lighting: 5V.
21
LBL
O
Backlight LED control.
Normally: 0V, lighting: 5V.
22
ME
-
MIC GND.
23
MIC
I
MIC signal input.
24
SB
O
Power output after power switch.
CN300
1
SB
I
Power input after power switch.
2
MIC
O
MIC signal output.
for
3
ME
-
MIC GND.
X57-
4
LBL
I
Backlight LED control.
TX-RX
Normally: 0V, lighting: 5V.
unit
5
LG
I
RX LED control. Normally: 0V, lighting: 5V.
6
LR
I
TX LED control. Normally: 0V, lighting: 5V.
7
AUX
O
AUX key output.
CN No. Pin No. Name I/O
Function
DISPLAY UNIT (X54-3210-12 A/2) : DISPLAY section
TX-RX UNIT (X57-6192-70): TX-RX section
8
PTT
O
PTT signal output.
9
NC
-
Not use.
10
CS
I
LCD driver chip select input.
11
AM
I
Audio mute signal input.
Mute: “L”, Unmute: “H”
12
5M
I
5V.
13
GND
-
GND
14
KI2
O
KEY output
15
KI1
O
KEY output
16
KRS
I
Key scan IC reset input
17
DT
I
Data input for LCD driver/decade counter.
18
TXD
I
Serial control signal input.
19
RXD
O
Serial control signal output.
20
CK
I
Clock data input.
21
PF
O
External PF signal output.
22
NC
-
Not use.
23
AFE
-
Audio GND.
24
AF
I
Audio input.
CN301
1
SSW
I
EXT/INT speaker switch input.
2
SP+
O
BTL for external speaker.
3
SP-
O
BTL output - for external speaker.
4
MSW
I
EXT/INT MIC switch input.
5
EMC
I
External microphone input.
6
ME
-
External microphone ground.
7
PTT
I
External PTT input.
8
PF
I
Programmable function key input.
9
NC
-
Not use.
10
E
-
GND
11
5M
O
5V output
12
TXD
O
Serial data output.
13
RXD
I
Serial data input.
14
NC (E)
-
Not use (GND)
CN302
1
SP
O
Output for internal speaker.
2
E
-
GND
CN304
1
NC
-
Not use.
2
LEDK
I
Backlight LED control.
3
LEDA
O
Backlight LED control.
4
VCI
O
LCD power supply.
5
SOD
O
Serial data output for LCD driver.
6
SID
I
Serial data input for LCD driver.
7
SCLK
O
Clock data output for LCD driver.
8
CS
O
LCD driver chip select output.
9
Vcc
O
5V
10
GND
-
GND
CN303
1
MON
O
Normally; 5V.,MON when connected GND.
For X57-
2
LAMP
O
Normally; 5V, LAMP when connected GND.
TX-RX
3
PTT
O
Normally; 5V, transmit when connected GND.
unit
4
GND
-
GND
CN No. Pin No. Name I/O
Function
DISPLAY UNIT (X54-3210-12 B/2) : SW section
