Nokia 3110 Uif Module CH 4
Programmes After Market Services
NHE –8/9 Series Transceivers
Chapter 4
Uif Module
issue 3 12/98
NHE –8/9
Uif Module
Technical Documentation
CONTENTS
Introduction 4 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Circuit description 4 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power on/off key 4 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keypad switch matrix 4 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid crystal display module 4 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back light 4 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keypad back light 4 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD back light 4 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buzzer driver circuitry 4 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Microphone and speaker connection 4 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Board to board connection 4 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Specifications 4 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics 4 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Signals and Connections 4 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uif Module – GU9 _08 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uif Module – GU9_10 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uif Module – GU9_11 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PAMS
NHE –8/9
Technical Documentation
List of Figures
Figure 1. Power Distribution 4 –5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2. Keypad switches – Simplex or Flat–J 4 –6. . . . . . . . . . . . . . . . . . . . .
Figure 3. System board connection pads, order of numbering. 4–10. . . . . . . .
Figure 4. LCD module identification 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note: In printed manuals all A3 drawings are located at the back of the binder.
GU9 _08
Figure 5 UIF Schematic 4–A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6 UIF Component Layout 4–A2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GU9 _10
Figure 7 UIF Component Layout 4–A3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uif Module
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Figure 8 UIF Circuit Diagram 4–A4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GU9 _11
Figure 9 UIF Component Layout 4–A5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10 UIF Circuit Diagram 4–A6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Uif Module
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Technical Documentation
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NHE –8/9
Technical Documentation
Introduction
This document describes the User Interface Module GU9.
The GU9 module is intended for use in the GSM and PCN version of the
NHE–8/9 product, that is FLAT–J and Simplex versions.
Functional Circuit description
The following sections of circuitry are included on the PCB:
– Power on/off key.
– Keypad switch matrix.
– Liquid Crystal Display Module and peripheral circuitry
– Keyboard & Display back light circuits
– Buzzer driver circuit and connection pads
– Pads for microphone and speaker connection
– A method of connection between the user interface PCB and the main
system board
Uif Module
The functions are described in details below. See
NO TAG for further information.
VL
VBatt
GND
Power on/off key
The power key, S422, is connected directly to the PSCLD via the line
’XPWRON’ and to ’ROW0’ trough the diode V418. When activated both
lines are pulled low.
LCD
Lights
Figure 1. Power Distribution
Key
Lights
UIF Schematic
Buzzer
driver
on page
LCD
When the key is pressed, its row will go low, but the value of the row will
not be changed when the column outputs are set high at the start of the
scanning process. This fact uniquely identifies the key. A diode is
necessary to prevent key presses on any switches connected to ROW0
from turning on/off the phone. This also protect the 3V baseband against
the pull up of XPWRON to VBATT inside PSCLD
The power key,S422, is handled as any other SMD component, and is
placed in the reflow process.
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NHE –8/9
Uif Module
Keypad switch matrix
The keypad consists of a matrix of 20 switch domes,in the keypad array (0
– 9, #, *, SEND, END, UP, DOWN, CLEAR, ALPHA, SOFTLEFT and
SOFTRIGHT). These are the references on the schematics. The
functionality of the keys are determined via software and is different from
the 3810 version (HD844 MCUSW) and the 3110 version (HD845
MCUSW). The schematics description corresponds to the key pad
functionality in 3810 version.
PAMS
Technical Documentation
X
CLEAR
SOFT
X
UP
X
DOWN
X
123
4
7
*
5
8
0
6
9
#
SOFTLEFT
CLEAR
123
4
7
*
SEND
UP
DOWN
5
8
0
SOFTRIGHT
ALFA
END
6
9
#
3110 Keypad, X: No function
Page 4 – 6
3810 Keypad
Figure 2. Keypad switches
The keypad keys are connected in a 6 by 4 matrix. The 4 outputs
(columns) are normally held at 0V by the ASIC. The 5 rows are also
connected to the ASIC – when any of these inputs goes low (there are
pull–ups inside the ASIC) the ASIC interrupts the MCU, which then
commences scanning. This involves taking all the columns high then
taking each individual column low in turn. When a low is received on a
row input, it can be deduced which key is pressed from the row input
number and the column output which is currently low.
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