Nokia HSE-6XA Documentation

Programmes After Market Services (PAMS)

Technical Documentation

NME–2A Series Transceivers

Chapter 5

Handset HSE - 6XA

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NME–2A

P.A.M.S.

Handset HSE - 6XA

Amendment Number

Date Inserted By Comments

08/97 Original

Technical Documentation

AMENDMENT RECORD SHEET

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Handset HSE - 6XA

CHAPTER 5 – HANDSET HSE - 6XA

CONTENTS

Introduction 5 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Summary 5 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modes of Operation 5 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

External Signals and Connections 5 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Specifications 5 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional Description 5 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional Blocks 5 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit Description 5 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 5 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page No

Construction 5 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Handset Module 5 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Microphone Amplifier 5 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Earphone Amplifier 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CPU with Peripherals 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HOOK Indicator 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M2BUS Electronics 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD Display 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Controller/Driver 5 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keyboard Matrix 5 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Illumination 5 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage Supply 5 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power on/off Logic 5 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oscillators 5 – 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly Parts 5 – 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of EH9 v. 3.4 5 – 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of EH9 v. 4.1 5 – 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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List of Figures

Figure 1. Handset connector 5 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2. Block Diagram – HSE–6XA 5 – 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3. Exploded View HSE–6XA 5 – 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematic Diagrams:

Circuit Diagram EH9 Module (Version: 0.8 Edit 48) 5/A3 – 1. . . . . . . . . . . . . . . .

Component Layout Diagrams EH9 Module Side 1 5/A3 – 2. . . . . . . . . . . . . . . . .

Component Layout Diagrams EH9 Module Side 2 5/A3 – 3. . . . . . . . . . . . . . . . .

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Introduction

The HSE–6XA Handset has two main functions: to form an

electro–acoustic interface between the user and the transceiver unit and

to provide means for controlling the transceiver unit and other

accessories.

The HSE–6XA is divided into two parts: the EH9 electronics module and

the MHSE6XA mechanics. The EH9 module consists of an 8–bit

microprocessor with internal memory, a 2x8 character display (+ 2

seven–segment) with one driver IC, keyboard, earphone, microphone,

loudspeaker and corresponding amplifiers.

The mechanics consist of the A–cover (front), B–cover (rear), keyboard

rubber mat, coiled cord, display frame and a number of smaller parts.

The HSE–6XA is designed for single–handset systems and for mobile use

only, so it has no audio switches, and is not provided with functions for a

power–safe or sleep mode.

Handset HSE - 6XA

Technical Summary

Modes of Operation

The HSE–6XA has only one mode of operation, used when the handset is

operating as a combined handset and control unit. There is no need for a

local mode because all testing can be done by means of

M2BUS–messages.

External Signals and Connections

The HSE–6XA has an 8–pin connector for connection to the junction box,

system cable and transceiver via coiled cord.

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Handset HSE - 6XA

RXD

HANDSET

47R

100k

10uF

47nF

Technical Documentation

VBS DGND

M2BUS

N/C

PWR AGND

MIC EAR

Figure 1. Handset connector

Signal names and basic interface connections:

Pin Name Level Comments

1 VBS typ. 13.2 V

min. 10.0 V

max. 17.0 V 2 DGND Digital ground 3 MBUS Input: ”0”< 0.9 V Input levels at processor

”1”> 1.9 V input/RxD

Output: ”0”< 0.5 V Max allowed capacitance 2

nF 4 No connection 5 POWER Series diode dropout 0.7 V 6 AGND Analog ground 7 MIC max. 2 V

rms

8 EAR max. 1.2 V

rms

No DC connection

DC 0.0 V

Display Specifications

The HSE–6XA comprises a 16 character (5x2) dot matrix and two and a half seven segment indexes.

The HSE–6XA comprises a 2x8 (5x7) dot matrix display for 2 seven–segment characters, a signal strength indicator (left bar) and a number of fixed indicators over and under the character lines.

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The yellow–green supertwist liquid crystal display is connected to the pcb by means of elastomer connectors. The display is illuminated with green LEDs from both sides.

Technical specifications for the display include: Display type Yellow–green supertwist lcd, transflective Illumination colour Yellow–green LED Driving mode MUX 1:16, 1/5–bias Driving voltage 7.5 V at +25°C Temp. compensation 30 mV/°C Lens thickness 1.1 mm Display driver NEC µPD7228AG Storage temperature –30...+85°C

Handset HSE - 6XA

Oper. temperature –25...+70°C Humidity typ. 50% RH max. 90% RH Response times t(

Functional Description

Functional Blocks

HSE–6XA Handset consists of the following functional blocks:

– Audio circuit – Microprocessor – Keyboard matrix – Keyboard illumination – Display controller/driver – Voltage converter – LCD display

) < 100 ms (+25°C) < 1500 ms (–25°C)

rise

) < 100 ms (+25°C) < 1500 ms (–25°C)

fall

– Display illumination

The Audio circuit consists of the earphone and the microphone and corresponding amplifiers.

The Microprocessor is a single chip version with internal ROM and RAM. The microprocessor controls all other blocks.

The Keyboard matrix is connected directly to microprocessor inputs and outputs.

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Handset HSE - 6XA

Keyboard illumination is accomplished with LEDs and is switched on, off or dimmed by the microprocessor.

The Display controller/driver is connected to the microprocessor over a parallel data line, and contains a display data RAM and character generator ROM/RAM.

The Voltage converter converts the voltages of +5 V to –5 V and divides the voltage between +5 V and –5 V to five levels (V1...V5), which are connected to the display controller/driver.

The LCD display is connected to pcb and display drivers over two elastomer connectors.

The Display illumination is of the same type as the keyboard illumination.

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