Nokia 2220 Servicehandbuch
CCS Technical Documentation
System Module
RH-42
Issue 2 09/2003
Nokia Corporation Confidential
Page 15
Flash Memory
Introduction
The RH-42 transceiver uses a 16-Mbit flash as its external memory. The VIO regulator is
used as a power supply for normal in-system operation. An accelerated program/erase
operation can be obtained by supplying Vpp of 12 volt to the flash device.
used as a power supply for normal in-system operation. An accelerated program/erase
operation can be obtained by supplying Vpp of 12 volt to the flash device.
The device has two read modes: asynchronous and burst. The burst read mode is utilized
in RH-42, except for the start-up, when the asynchronous read mode is used for a short
time.
time.
User Interface Hardware
LCD
Introduction
RH-42 uses a black-and-white GD46 84x48 full dot matrix graphical display. The LCD
module includes the LCD glass, the LCD COG-driver, an elastomer connector, and a metal
frame. The LCD module is included in the lightguide assembly module.
module includes the LCD glass, the LCD COG-driver, an elastomer connector, and a metal
frame. The LCD module is included in the lightguide assembly module.
Interface
The LCD is controlled by the UI SW and the control signals are from the UPP ASIC. The
VIO and Vflash1 regulators supply the LCD with power.
VIO and Vflash1 regulators supply the LCD with power.
The LCD has an internal voltage booster and a booster capacitor is required between
Vout and GND.
Vout and GND.
Pin 3 (Vss9) is the LCD driver’s ground and Pin 9 (GND) is used to ground the metal
frame.
frame.
Keyboard
Introduction
The RH-42 keyboard style follows the Nokia Jack style, without side keys for volume con-
trol. The PWR key is located at the top of the phone.
trol. The PWR key is located at the top of the phone.