Nokia 2010 Contents of UIF Module GU1 versions

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

11/97 OJ Technical Documentation

Contents of UIF Module GU1 versions

UIF Modules GU1 Versions 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documentation 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

General 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hierarcy of Design 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Specifications 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mechanics 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electronics 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

External Signals and Connectors 9–4. . . . . . . . . . . . . . . . . . . . .

UIF Connector X1 9–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply Voltages and Power Consumption 9–4. . . . . . . . . . . . .

Control Signals 9–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional Description 9–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keyboard Styles Change 9–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keybard Scanning 9–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keyboard and Display Illuminations 9–6. . . . . . . . . . . . . . . . . . .

Buzzer Circuit 9–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audio Circuitry 9–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF Suppression 9–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Driver 9–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display 9–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vibrating Alert Control Line 9–8. . . . . . . . . . . . . . . . . . . . . . . . . .

Power Distribution Diagram 9–9. . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of GU1N 9–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of GU1T 9–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of GU1MN 9–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of GU1MT 9–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9–1

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

11/97 OJ Technical Documentation

UIF Module GU1 Versions

General

GU1N, GU1T, GU1MN and GU1MT modules are described in this document.

The modules are used in the GSM/PCN phones as shown in following table:

Transceiver GU1N GU1T GU1MN GU1MT

NHE–3DN X or X

NHE–3DA X or X

NHE–3DB X or X

NHE–3DP X

NHE–3YB X

NHE–3ZB X

9–2

NHK–3XN X

NHK–3XA X

NHK–3XB X

NHK–3XT X

NHK–3XP X

Hierarcy of Design

The same PCB layout is used in all modules. The difference between

GU1N/MN and GU1T/MT modules is different locations of power on/off key. In

GU1N/MN has power key in upper right corner in PCB, in GU1T/MT has power

key on left side under LCD.

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

11/97 OJ Technical Documentation

Technical Specifications

Mechanics

The module is made from a single printed circuit board – loaded with all the

parts for the User Interface Module.

The major mechanical parts on the UIF assembly include the following:

– LCD + flexfoil and lightguide

– board to board connector to system module

– connectors for acoustic components: speaker and buzzer

– acoustic components: microphone, speaker and buzzer.

Electronics

The following sections of circuitry are included on the PCB:

9–3

– microphone circuit

– speaker circuit

– buzzer driver

– display

– display driver

– LCD voltage divider & temperature compensation circuit

– oscillator and negative voltage supply circuit for LCD

– keyboard & display lighting circuits

– keyboard switch matrix

– vibra control line

UIF MODULE GU1 VERSIONS

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11/97 OJ Technical Documentation

External Signals and Connectors

The UIF module has two connectors, display module connector X1 and UIF

connector X1.

UIF Connector X1

Pin Name Description

1 VL1 Logic supply voltage 4.65V

2, 25 GND Ground

3, 30 VBATT Battery voltage

4 BACKLIGHT Backlights on/off

5 – 12 UIF(0:7) Lines for keyboard read and LCD contr. control

13 – 16 COL(0:3) Lines for keyboard write

17 UIF(8) Line for LCD controller

9–4

18 MICP Microphone (positive node)

19 MICN Microphone (negative node)

20 EARP Earpiece (negative node)

21 EARN Earpiece (positive node)

22 BUZZER PWM signal buzzer control

23 XPWRON Power key (active low)

24 VA1 Analog supply voltage 4.65V

26 MICENA Microphone bias enable

27 VIBRA Vibra alert control

28, 29 AGND Analog ground

Supply Voltages and Power Consumption

Symbol Description Values

VL1 Logic voltage

• voltage min/typ/max:

• current typical/nominal:

4.5...4.65...4.8 V

1.5 mA

VA Analog voltage

• voltage min/typ/max:

• mic enabled typ/nom current:

• max volume level to earphone

typ/nom current:

4.5...4.65...4.8 V 250 µA

25 mA

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

Symbol Description Values

BATT Battery voltage

Control Signals

Symbol Description Values

MICENA Microphone enable

BACKLIGHT key and LCD backlightning control

11/97 OJ Technical Documentation

• voltage min/typ/max:

• Buzzer with max volume

nom/max current:

• keyboard and display illumination nom current:

• enabled typ/max

• disabled min/typ

• Lights on min/max

• Lights off min/max

9–5

5.3...6.0...9.0 V 85

...

115 mA

65 mA

0...3 V VA–0.4...VA V

VA–1.0...VA V

0...2.0 V

VIBRA Call indicator control

• Vibra alert on typ

• Vibra alert off typ/max

VL1 V

0...0.5 V

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

Functional Description

The module is connected to system board with 30p. board to board connector.

The module have following main blocks:

– keyboard circuit

– keyboard and display illuminations

– buzzer circuit

– audio circuits

– display circuit

– vibrating alert control line

Keyboard Styles Change

In NOKIA (1) style tranceivers is power on/off key in the upper right corner of

PCB and in NOKIA (1 and 2)/OEM style tranceivers is power on/off key on the

left side of PCB under LCD. GU1N/GU1MN versions are purposed to use in

NOKIA (1) style tranceivers and GU1T/GU1MT versions in NOKIA (1 and 2)/

OEM style tranceivers. Only difference between these module versions is

placement of R61 and R62 jumper resistors. Different placement of these jump-

ers makes possible to use same PCB in both styles. The markings N and TP

above the jumpers illuminate which module version is in use. If jumper resistors

are placed under N markings, module is NOKIA (1) style and if they are placed

under TP markings, module is NOKIA (1 and 2)/OEM style.

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9–6

Keybard Scanning

COL(0–4) are used as column lines in keyboard. UIF(0–5) are multiplexed with

display driver control signals and are used as keyboard row lines too.

When a key is pressed the ASIC gets an interrupt from a row and the MCU

start scanning columns. One column at a time is written to low and rows are

used to read which key it was. The power off detection is multiplexed with one

row, when all keys on the row seems to be pressed the ASIC knows that power

key is pressed. The power key is also connected to PSL+ to switch the power

on.

Keyboard and Display Illuminations

The keyboard illumination is achieved by using transistor V17, wired as simple

constant current sinks. It supplies 10 keyboard leds. The base of the transistor

is supplied by emitter follower V14. The led current is fixed by the value of R58

and the ratio of R55 to R56. R65 and R66 balance illuminating between num-

ber keys and function keys. The current of numberkey leds is about 5 mA and

of functionkey leds about 10 mA.

UIF MODULE GU1 VERSIONS

NHE–3 NHK–3

The display illumination operates in a similar. V33 supplies four display leds

and led current is about 10 mA. The current in this case is defined by the value

of R60 and the ratio of R55 to R56.

Buzzer Circuit

The buzzer is dynamic type and the impedance is 25 ohm. The buzzer is fitted

with 25 mm wires and male–side connector. It is connected to UIFmodule via

connector X2. The buzzer is driven from a single transistor switch (V12) which

acts as a buffer for a CMOS output signal applied at BUZZER. Two inverter

from D1 amplifier BUZZER signal to V12. The ringing volume is controlled by

pulse width modulation.

The diode V11 prevents damage to the transistor when switched off, absorbing

the stored energy in the buzzer inductance and suppressing large positive go-

ing spikes on the transistor collectors.

Audio Circuitry

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The earpiece is fitted with 40 mm wires and male side connector. It is con-

nected to UIF module via speaker connector X3. The earpiece is dynamic type

and impedance is 32 ohm and sensitivy 118 dB/1 V. The earphone signal is

routed directly via series resistor R16 and R17 to earpiece connector X3.

VA is an analogue rail supplied by the PSL+ chip on the system board. It is

4.65 V in magnitude. V4 is wired as a switch for VA, controlled by the micro-

phone enable line [MICENA].

Microphone has 10 mm wires and it is soldered straigth to UIF module. Micro-

phone is the electret type and needs a voltage supply for operation. The sensi-

tivy of the microphone is –62 dB (0 dB = 1V/ubar). When MICENA is low bias

voltage is connected to the microphone via transistor V5. C10 and C11 act as

high pass filter with pulldown resistors on the baseband side. –3 dB:n point is

about 100 Hz.

RF Suppression

Small value capacitors are fitted at critical points in the circuit to avoid problems

with rf interference. One is placed directly across the microphone (C9). V5 has

a cap to ground from each of its three terminals (C6,C7 and C8).

Display Driver

The display driver and keyboard row lines uses same interface to system ASIC.

They are separated each other by software. The display driver communicate in

paraller mode with MCU via systemASIC. The communications is synchronous

and needs strobe clock signal which is generated by MCU. The display driver

also requires a control signal to know whether the data to be received is a com-

mand or normal data. Busy, reset and chip select signals are also required be-

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