SAMSUNG Proprietary-Contents may change without notice
6-2
Circuit Description
6-1-3 Logic Part
The logic part consists of MSM, FROM, SRAM,
EEPROM, LCD and other input and output
peripherals.
MOBILE SYSTEM MODEM(U100:MSM5100)
The MSM5100 is designed to the IS-2000 standard
and enables up to a doubling of overall IS-95A/B
voice capacity and new, higher-data rate services.
The MSM5100 can support 153.6 kilobits per
second(kbps), providing manufacturers worldwide
ability to develop consumer products that provide
voice, high-speed data and video over wireless
networks. The MSM5100 chipset and system
software can support the phase1 1°øMC of the 3G
CDMA Multi Carrier IS-2000 standard, Release 0.
The MSM5100 device is available in the same 208-
pin FBGA production package allowing significant
reuse of existing MSM3100 chipset designs. The
MSM5100 integrates functions that support a tri-
mode CDMA/FM subscriber unit. Subsystems
within the MSM5100 device include a CDMA
processor, a Digital FM(DFM) processor, a QDSP for
voice compression, an ARM7TDMI microprocessor.
Also integrated in the MSM5100 device are analog
functions such as an audio voice codec, PLL,
transmit DACS, ADCS, memories, USB controller,
peripheral interfaces, and an enhanced clock. It is
one of the most important components of the
CDMA cellular phone. The interface circuitry
consists of reset circuit, address bus (A0-A21), data
bus(D0-D15), and memory controls. The TCXO
clock of 19.68Mhz is used as the clock of SCH-A310
model.
FLASH ROM AND STATIC RAM (U120)
One 32MBIT Flash ROMs and 8MBIT Flash
ROM(U120) is used to store the cellular phone's
executable program and necessary data files and a
temporary data space to store the internal flag
informations, call processing data, timer data, and
other temporary data.
EEPROM(U190)
A 256KBIT EEPROM(U190) is used to store ESN,
NAM information, telephone directory, SMS
messages and other important information of the
phone.
KEYPAD
A key pad is used for the user interface function.
For key recognition, key matrix is operated by using
signals SCAN0-5 and KEY0-3 of the MSM.
LCD MODULE
The LCD module is a 128 X 128 dots graphic LCD
with one line of ICONS. Watch LCD is a 96 X 32
dots graphic LCD. The LCD contains a controller
which will display the information by 8-bit data
from the MSM. An external backlight circuitry is
used for easy operation in the dark.
