Nokia 9110 Service Manual

Page of 32
PAMS
Technical Documentation
RAE–2
General Information
Page 1–31
Original 02/99     
PDA HW Module (BS1)
GEOS
HW–
Drivers
Spock GS–DOS
Spock GS–BIOS
GEOS Kernel & Services
GEOS Applications
Manufacturing,
After Sales
and
R&D services
Testmode
       PC
Connectivity
 
CMT
The lowest level of HW/SW interface is handled by the BIOS which provides
some basic services for upper sw layers.  E.g. read data from memory card.
Testmode is used by production and After Sales.  It provides the interface to
test and program PDA and CMT modules.
DOS layer implements only a subset of DOS functions known from convention-
al PC.  DOS is used mainly in testmode and to launch GEOS.
GEOS is the basic SW platform to all applications that user sees. It however
interfaces directly to some HW resources, like LCD display or  serial ports, by
its own HW drivers.
Alignment
Both PDA and CMT modules require alignment. Alignment is done at module
level to modules BS8 and BS1. LCD temperature measurement can be done
only after the assembly of the product.
The following parameters are adjusted in CMT module (BS8): TX power, RSSI,
AFC ,TX I&Q, battery voltage and charging current.
PDA module (BS1) needs alignment of: battery voltage, LCD contrast voltage.
Alignment is software based. Predefined reference point measurements are
stored into EEPROM (CMT) or flash (PDA).