User Guide

NMM-3 Company Confidential
7 - System Module & UI CCS Technical Documentation
Page 7-16 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
UI Module
The UI Module comprises of:
•LCD Display
• Display and Keypad Backlight LED’s
• Light Guide
•Key Domes
• Engine Shielding
Display
NMM-3 uses a Sharp active matrix LCD (Liquid Crystal Display) module. The module is
comprised of a glass panel, driving IC’s, a backlight system with three white LED’s (Light-
Emitting Diode’s), and a metal frame. The display panel performs RGB with 132 × 162
dot resolution.
For details on signal connections, see ‘UI Module Pin Description’ table below.
Backlighting
NMM-3 UI module has 2 sets of LEDs:
• 3off LCD LEDS: Nichia NSCW215T WHITE. Wired in series. Required cur-
rent = 22mA.
• 4off KEY LEDS: Citizen CL270B blue Wired in two series chains of 2. Cur-
rent ~ 8.5mA.
To enable flexibility in driver solution, the engine/UI interface has been arranged with
the power supplies separate. i.e. paired supplies +VLCDLED,-VLCDLED, and +KEYLED, -
KEYLED
Power is supplied by a Toko LED driver.
In block form the LED driver arrangement is shown below.
The TOKO boost supply switches at 600kHz 18V max. LCDLED current set by 22R resistor
across the TOKO 0.5V reference voltage
The constant current sink used for the KeyLEDs is used for tight current control but
allowing the widest possible VF (Forward Voltage) tolerance for the KEYLEDs.
11 CLK - CIFCLKN CIFClkN TIKU Fast serial data out which is inverted to Clk+
12 VDD VCAM VOUT N102 Reg 2.8V Analog supply Voltage
13,14 GND2 GND GND Ground line corresponding to VDD
No.
Camera
Name
NMM-3
Name
NMM-3 Destination Function