1-24 (No.RA054<Rev.001>)
2.5.2 SUB unit (XC3-050M-00)
2.5.3 Module(BT/GPS) unit (XC2-0040-10)
2.6
TERMINAL FUNCTION
2.6.1 TX-RX unit (XC1-182K-00,XC1-183K-XX)
D205-209
Diode
Antenna switch
D301-304
Diode
Excessive input protection
D401
Diode
Reverse current prevention
D402-406
Diode
Line protection
D407
Zener diode
Over voltage protection
D408-410
Diode
Reverse current prevention
D601
Zener diode
Over voltage protection
D602
Diode
Reverse current prevention
D603-608
Zener diode
Line protection
D609,610
Diode
Line protection
D611
Zener diode
Over voltage protection
D612,613
Diode
Line protection
D614,615
Diode
Reverse current prevention
D616,617
Diode
Surge protection
D618
Diode
Over voltage protection
D619
Diode
Reverse current prevention
Ref. No.
Part Name
Use / Function
IC1
IC
Voltage regulator (50M)
IC3,4
IC
Level conversion
IC5
IC
Bus switch
IC6
IC
I/O expander
Q1
FET
DC switch
Q2
FET
DC switch (KEY Illumination)
Q3,4,6
Transistor
DC switch (TX/BUSY)
Q8
FET
DC switch (LCD backlight)
D1,2
Diode
Surge protection
D3-6
LED
KEY Illumination
D9,10
LED
LCD backlight
D11,12
LED
KEY Illumination
D15,16
LED
LCD backlight
D17,18
LED
KEY Illumination
D20
LED
TX/BUSY LED
D21
Zener diode
Over voltage protection
D22
Diode
Reverse current protection
D24
Zener diode
Over voltage protection
D26
Zener diode
Over voltage protection
D27
Diode
Over current protection
D28
Zener diode
Over voltage protection
D30
Zener diode
Over voltage protection
D32
Zener diode
Over voltage protection
D33,34
LED
KEY Illumination
Ref. No.
Part Name
Use / Function
Ref. No.
Part Name
Use / Function
IC1
IC
Level conversion
IC2
IC
Voltage regulator (18BT)
IC3
IC
Voltage regulator (33BT)
IC4
IC
Voltage regulator (33GPS)
IC5
IC
GPS/Bluetooth
IC6,7
IC
Level conversion
Q1
FET
DC switch
D17,18
Diode
Over voltage protection
Pin No.
Name
I/O
Function
CN1
1
GND
- Ground
2
GND
- Ground
3
GND
- Ground
4
NC
- No connection
5
SP+
O Speaker output
6
SP+
O Speaker output
7
SP+
O Speaker output
8
NC
- No connection
9
GND
- Ground
10
GND
- Ground
11
GND
- Ground
12
GND
- Ground
13
IGN
- Ignition sense input
14
SB1
O Switched power supply
15
SB1
O Switched power supply
16
SB1
O Switched power supply
17
SB1
O Switched power supply
18
NC
- No connection
19
54M
O 5.4V output
20
NC
- No connection
21
32M
O 3.2V output
22
NC
- No connection
23
18M
O 1.8V output
24
NC
- No connection
25
GND
- Ground
26
USB_D+
I/O USB0 PHY data plus
27
GND
- Ground
28
USB_D-
I/O USB0 PHY data minus
29
GND
- Ground
30
NC
- No connection
31
MIC/VBUS
I MIC signal input / USB VBUS
Detection
Summary of Contents for NX-3720
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