NX-420
54
TERMINAL FUNCTION
Display unit (X54-3760-XX A/3)
Pin No.
Name
I/O
Function
CN5
1
33M
I
33M input
2
SCK0
I
Clock input
3
SDI0
I
Serial data input
4
SDO0
O
Serial data output
5
DISP_VER
O
Display version detection
6
/EVCS
I
Chip enable
7
/LCDCS
I
LCD IC chip enable
8
GND
-
GND
9
RXAF_2
I
RX AF input with BEEP and VOICE
10
ASQ
O
Analog squelch voltage output
11
ASQAPC
I
Analog squelch signal input
12
VOX
O
VOX voltage output
13
MIC
O
MIC modulation output
14
50C
I
50C input
15
MOD
I
AF modulation input
16
GND
-
GND
17
VCO_MOD
O
VCO modulation output
18
33A
I
33A input
19
TV2
O
Tuning control voltage 2 output
20
TV1
O
Tuning control voltage 1 output
21
SPAF
O
AF output for amplifi er
22
GND
-
GND
23
MICI
I
MIC modulation input
24
SB2
I
SB2 input
Display unit (X54-3760-XX B/3)
Pin No.
Name
I/O
Function
CN6
1
GND
-
GND
2
PTT
O
Internal PTT input
3
/S1
O
Key input (SIDE1 key)
4
/S2
O
Key input (SIDE2 key)
5
/EMG
O
Key input (EMG key)
6
GND
-
GND
TX-RX unit (X57-8370-10)
Pin No.
Name
I/O
Function
CN500
1
+B
O
Power output after passing through
the fuse
2
SB1
I
Power input after power switch
3
NC
-
No connection
4
33A
O
33A output
Pin No.
Name
I/O
Function
5
VOL
I
Volume level input for audio control
6
VOL_GND
-
GND for volume level
7
ENC3
I
Rotary switch input
8
GND
-
GND
9
ENC4
I
Rotary switch input
10
ENC2
I
Rotary switch input
11
ENC1
I
Rotary switch input
CN600
1
SB2
O
SB2 output
2
MICI
O
MIC modulation output
3
GND
-
GND
4
SPAF
I
AF input for AF amplifi er
5
TV1
I
Tuning control voltage 1 input
6
TV2
I
Tuning control voltage 2 input
7
33A
O
33A output
8
VCO_MOD
I
VCO modulation input
9
GND
-
GND
10
MOD
O
AF modulation output
11
50C
O
50C output
12
MIC
I
MIC modulation input
13
VOX
I
VOX voltage input
14
ASQAPC
O
Analog squelch signal output
15
ASQ
I
Analog squelch voltage input
16
RXAF_2
O
RX AF output with BEEP and VOICE
17
GND
-
GND
18
/LCDCS
O
LCD IC chip enable
19
/EVCS
O
Chip enable
20
DISP_VER
I
Display version detection
21
SDO0
O
Serial data output
22
SDI0
I
Serial data input
23
SCK0
O
Clock output
24
33M
O
33M output
CN604
1
GND
-
GND
2
PTT
I
Internal PTT output
3
/S1
I
Key output (Side1 key)
4
/S2
I
Key output (Side2 key)
5
/EMG
I
Key output (EMG key)
6
GND
-
GND
CN902
1
MIC+
I
Internal MIC input
2
MIC–
-
Internal MIC GND
3
SP+
O
Internal speaker output
4
SP–
-
Internal speaker GND
Summary of Contents for NX-420 K
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