Nokia 2170 Service Manual uifmod
Programme’s After Market Services
NHP–4 Series Transceivers
Chapter 5
Uif Module
Issue 1 04/99
NHP–4
Uif Module
Technical Documentation
CONTENTS
External Signals and Connections 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main components on the DU8 module 5–5. . . . . . . . . . . . . . . . . . . . . . . .
Keyboard scanning and display driver control 5–6. . . . . . . . . . . . . . . . . .
Keyboard and display illumination 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Circuitry 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD Module Interface 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Diagram 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List – DU8D_06 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAMS
Page No
List of Figures
Figure 1. UIF Interconnection Diagram 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2. UIF Connections: Pin No. order 5–4. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3. Power Distribution 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UIF Schematic 5–A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UIF Component Layout 5–A2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page No
Page 5–2
Issue 1 04/99
PAMS
NHP–4
Technical Documentation
Uif Module
External Signals and Connections
Table 1. To Radio Module
Signal Name Pin / Conn. Notes
VL1 1 Logic supply voltage 3.15V
GND 2 Ground
V
BATT
BACKLIGHT 4 Backlights on/off
UIF(0:6) 5 – 11 Lines for keyboard read and LCD–controller
MIC_ENA 12 Microphone bias enable
COL(0:3) 13 – 16 Lines for keyboard write
CALL_LED 17 Call led enable
MICP 18 Microphone (positive node)
MICN 19 Microphone (negative node)
3, 30 Battery voltage
control
EARP 20 Earpiece (positive node)
EARN 21 Earpiece (negative node)
BUZZER 22 PWM signal buzzer control
XPWRON 23 Power key (active low)
VA2 24 Analog supply voltage 3.15V
NC 25,27,28
V
LCD
26 Supply voltage 4.0V for the LCD driver
AGND 29 Analog ground for the microphone
BUZZER
POWER
ON/OFF
UIF
Connector
EAR
DISPLAY
DISPLAY
DRIVER
KEY
BOARD
MIC
Issue 1 04/99
Figure 1. UIF Interconnection Diagram
Page 5–3