Subsystem(Msm6280) - LG CU400 Service Manual

3. TECHNICAL BRIEF

3.11 Subsystem(MSM6280)

3.11.1 ARM Microprocessor Subsystem
The MSM6280 device uses an embedded ARM926EJ-S microprocessor. This microprocessor,
through the system software, controls most of the functionality for the MSM, including control of the
external peripherals such as the keypad, LCD, SDRAM, and NAND-Flash devices. Through a
QUALCOMM proprietary serial bus interface (SBI) the ARM926EJ-S configures and controls the
functionality of the RTR6275, RFR6275 and PM6650 devices.
3.11.2 WCDMA R99 features
The MSM6280 device supports release 99 June 2004 of the W-CDMA FDD standard, including the
following features:
■ All modes and data rates for W-CDMA frequency division duplex (FDD), with the following
restrictions:
❏ The downlink supports the following specifications:
• Up to four physical channels, including the broadcast channel (BCH), if present
• Up to three dedicated physical channels (DPCHs)
• Spreading factor (SF) range support from 4 to 256
• The following transmit diversity modes are supported:
Space time transmit diversity (STTD)
Time-switched transmit diversity (TSTD)
Closed-loop feedback transmit diversity (CLTD)
■ The uplink supports the following specifications:
❏ The uplink provides the following UE support:
• One physical channel, eight TrCH, and 16 TrBks starting at any frame boundary
• A maximum data rate of 384 kbps
❏ Full SF range support from 4 to 256
■ SMS (CS and PS)
■ PS data rate - 384 kbps DL / 384 kbps UL
■ CS data rate - 64 kbps DL / 64 kbps UL
■ AMR (all rates)
3.11.3 GSM features
The following GSM modes and data rates are supported by the MSM6280 device hardware.
Support modes conform to release '99 specifications of the sub-feature.
■ Voice features
❏ FR
❏ EFR
❏ AMR
❏ HR
❏ A5/1, A5/2, and A5/3 ciphering
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