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

Nokia 7110 Mic Diagram

Technical Documentation

General Information and NAM Programming

Nokia 3510i Series Connector Pins
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.

Table 6. Signals of the system connector

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

Table 6. Signals of the system connector (continued)

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.

Table 7. Battery Connector Electrical Specifications

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

List of Modules NHX-7

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

Nokia 8210 Block Diagram
BACKLIGHT BACKLIGHT

Technical Documentation

General Information and NAM Programming

DIY Battery Repair

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.

Get My Free Ebook


Post a comment