External signals and Connections
This section describes the external electrical connection and interface levels on the baseband. The electrical interface specifications are collected-ed into tables that covers a connector or a defined interface each.
System Connector
The system connectors includes the following parts:
- DC connector for external plug-in charger and a desktop charger.
- System connector for accessories and intelligent battery packs.
- Internal microphone with spring contacts.
Battery contact BVOLT Bi
Battery contact BVOLT Bi
Technical Documentation
General Information and NAM Programming
- Table 5. System connector contacts
|
Contact |
Line Symbol |
Function |
|
1 |
VIN |
Charger input voltage |
|
DC-jack side contact (DC-plug ring) |
L_GND |
Charger ground |
|
DC-jack center pin |
VIN |
Charger input voltage |
|
DC-jack side contact (DC-plug jacket) |
CHRG_CTRL |
Charger control output (from phone) |
|
2 |
CHRG_CTRL |
Charger control output (from phone) |
|
Microphone acoustic port |
Acoustic signal (to phone) | |
|
3 |
XMIC |
Accessory microphone signal input (to phone) |
|
4 |
SGND |
Accessory signal ground |
|
5 |
XEAR |
Accessory earphone signal output (from phone) |
|
6 |
MBUS |
MBUS, bidirectional serial data I/O |
|
7 |
Not used | |
|
8 |
Not used | |
|
9 |
L_GND |
Charger ground |
The electrical specifications in the table below shows the bottom connector signals and levels in the baseband. The system connector is used to connect the transceiver to accessories. System connector pins can also be used to connect intelligent battery packs to the transceiver. The table gives the idle voltage produced by the acceptable chargers at the DC connector input. The absolute maximum input voltage is 30 V due to the transient suppressor that is protecting the charger input.
|
Pin |
Name |
Min |
Typ |
Max |
Unit |
Notes |
|
1,3 |
VIN |
7.25 |
7.6 |
7.95 |
V |
Unloaded ACP-7 Charger |
|
320 |
370 |
420 |
mA |
Supply current | ||
|
7.1 |
8.4 |
9.3 |
V |
Unloaded ACP-9 Charger | ||
|
720 |
800 |
850 |
mA |
Supply current | ||
|
2 |
L_GND |
0 |
0 |
0 |
V |
Charger ground input |
|
4,5 |
CHRG_ |
0 |
0.5 |
V |
Charger control PWM low | |
|
CTRL |
2.0 |
2.90 |
V |
Charger control PWM high | ||
|
32 |
Hz |
PWM frequency for a fast charger | ||||
|
1 |
99 |
% |
PWM duty cycle | |||
|
6 |
MICP |
N/A |
N/A |
N/A |
See Audio section | |
|
7 |
MICN |
0 |
V |
Internal microphone. Connected to GND | ||
|
8 |
XMIC |
2.0 |
2.2 |
kW |
Input AC impedance, Headset detected | |
|
100 |
600 |
mA |
Bias current for headset microphone | |||
|
0 |
3.2 |
45 |
mV |
Headset microphone signal Connected to NASTA Mic input | ||
|
60 |
3500 |
mV |
Maximum signal level | |||
|
2.73 |
2.82 |
2.90 |
V |
DC voltage ( 47 k pull-up to VL ) | ||
|
2.0 |
2.90 |
V |
Headset not detected | |||
|
0 |
2.0 |
V |
Headset detected | |||
|
9 |
SGND |
0 |
mV |
Signal ground | ||
|
10 |
XEAR |
130 |
W |
Output AC impedance (ref. GND) | ||
|
10 |
mF |
Series output capacitance | ||||
|
16 |
300 |
W |
Load AC impedance to SGND (Headset) | |||
|
1.6 |
Vpp |
Maximum output level (no load) | ||||
|
15 |
620 |
mV |
Output signal level ( Headset connected ) | |||
|
16 |
1500 |
W |
Load DC resistance to SGND (Headset) | |||
|
2.73 |
2.82 |
2.90 |
V |
DC voltage (47k pull-up to VL) |
Technical Documentation General Information and NAM Programming
|
Pin |
Name |
Min |
Typ |
Max |
Unit |
Notes |
|
11 |
MBUS |
0 2.0 |
logic low logic high |
0.8 2.90 |
V |
Serial bidirectional control bus. Baud rate 9600 Bit/s Phone has a 4k7 pullup resistor |
|
12 |
Not connected | |||||
|
13 |
Not connected | |||||
|
14 |
L_GND |
0 |
0 |
0 |
V |
Charger ground input |
An external headset device is connected to the system connector XMIC, SGND and XEAR lines, from which the signals are routed to NASTA microphone input via analog mux and external earphone output via buffer.
For protection against ESD spikes at the system connector, the data transmission line (MBUS), charger control (CHRG_CTRL), charger input (VIN), external microphone (XMIC) and external earphone (XEAR) lines are equipped with an ESD protection circuit.
Battery connector
The electrical specifications for the battery connector is shown in table 7.
|
Pin |
Name |
Min |
Typ |
Max |
Unit |
Notes |
|
1 |
BVOLT |
3.1 |
3.6 |
4.8 4.8 5.3 |
V |
Battery voltage Maximum voltage in call state with charger Maximum voltage in idle state with charger |
|
2 |
BSI |
0 |
2.90 |
V |
Battery size indication Phone has 22kohm pull up resistor. | |
|
2.2 |
18 |
kohm |
Battery indication resistor (Ni battery) | |||
|
20 |
24 |
kohm |
Battery indication resistor (service battery) | |||
|
25 |
57 |
kohm |
Battery indication resistor (4.1V Lithium battery) | |||
|
3 |
BTEMP |
0 |
2.90 |
V |
Battery temperature indication Phone has a 100k (+-5%) pullup resistor, Battery package has a NTC pulldown resistor: 47k+-5%@+25C , B=4050+-3% | |
|
9 |
11 |
14 |
kHz |
PWM control to VIBRA BATTERY | ||
|
4 |
BGND |
0 |
0 |
V |
Battery ground |
General Information and NAM Programming Technical Documentation
|
Unit |
Type code |
Material code |
|
User Interface Module |
JE3 |
0201213 |
|
System/RF Module |
JP3 |
0201185 |
|
Assembly parts |
MNHX7N |
0261696 |
NHX-7 Block Diagram
NHX-7 Block Diagram
- BACKLIGHT BACKLIGHT
Technical Documentation
General Information and NAM Programming
DIY Battery Repair
You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.
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