Terminal Function - Kenwood NX-300 Service Manual

NX-300(G)
Control unit (XC1-0020-XX)
Pin No. Name I/O
1 /CS O
2 /RES O
3 A0 O
4 /WR O
5 D0 I/O Data bus 0
6 D1 I/O Data bus 1
7 D2 I/O Data bus 2
8 D3 I/O Data bus 3
9 D4 I/O Data bus 4
10 D5 I/O Data bus 5
11 D6 I/O Data bus 6
12 D7 I/O Data bus 7
13 VDD O
14 VSS -
15 VDD O
16 V1 -
17 V2 -
18 V3 -
19 V4 -
20 V5 O
1 ME -
2 EMC I
3 SP+ O
4 SP+ O
5 SP- O
6 SP- O
7 6_/KEYI1 I
8 6_/KEYO2 O
9 BL_SB O
10 6_/KEYO0 O
11 6_/KEYO1 O
12 BL_SB O
13 6_/KEYI0 I
14 AGND -
1 33A O
2 VOL_GND -
3 VOL I
4 EN3 I
5 AGND -
6 EN4 I
7 EN1 I
8 EN2 I
66

TERMINAL FUNCTION

Function
CN1
Chip select output
LCD reset output
Address bus 0 output
WR bus output
3.3V LCD power supply output
GND
3.3V LCD power supply output
LCD drive power supply
LCD drive power supply
LCD drive power supply
LCD drive power supply
LCD drive power supply
CN23
Internal MIC GND
Internal MIC input
BTL output + for internal speaker
BTL output + for internal speaker
BTL output – for internal speaker
BTL output – for internal speaker
Key matrix input (KEYI1 for 6-key)
Key matrix output (KEYO2 for 6-key)
LCD backlight voltage output
Key matrix output (KEYO0 for 6-key)
Key matrix output (KEYO1 for 6-key)
LCD backlight voltage output
Key matrix input (KEYI0 for 6-key)
GND
CN403
3.3V for volume level
GND for volume level
Volume level input for audio control
Rotary switch input
GND
Rotary switch input
Rotary switch input
Rotary switch input
Pin No. Name I/O
Power output after passing through the
9 +B O
fuse
10 SB1 I Power input after power switch
CN404
1 LED_G O Green LED control output
2 /EMG I Emergency (Orange) key input
3 LED_R O Red LED control output
4 IFC I TX-RX PCB version recognition input
5 /SAVE O 50C Reg. control output
6 I2CCK O TCXO thermometer clock output
7 /5TC O 50T Reg. switch control output
8 I2CSDA I/O TCXO thermometer data input/output
9 SBC O SB3 switch control output
10 /T_R O TX/RX control output
11 TV2 O RX tuning voltage 2 output
12 ASSIST O VCO tuning voltage output
13 TV1 O RX tuning voltage 1 output
14 VAGC I AGC voltage input
15 5RC O 50R switch control output
TCXO_
16 O TCXO modulation output
MOD
17 PGND - GND
18 RSSI I RSSI voltage input
19 PGND - GND
20 CV I CV voltage input
21 AGND - GND
22 NC - No connection
23 NC - No connection
24 +B I Power input after passing through the fuse
25 +B I Power input after passing through the fuse
26 +B I Power input after passing through the fuse
27 +B I Power input after passing through the fuse
28 NC - No connection
29 NC - No connection
30 AGND - GND
31 /PTT I PTT input
32 Side_G O Key matrix output (SIDE1,2 key)
33 Side_1 I Key matrix input (SIDE1 key)
34 W_/N O W/N control output
35 SDO1 O PLL serial data output
36 Side_2 I Key matrix input (SIDE2 key)
37 /PCS_RF O PLL enable output
APC voltage discharge switch control
38 /DSW O
output
39 APC O APC control voltage output
40 /APCSW O APC switch control output
41 VCO_MOD O VCO modulation output
Function