Digital Baseband(Dbb/Msm6250A) - LG U890 Service Manual

3. BB Technical Description

3.6 Digital Baseband(DBB/MSM6250A)

3.6.1 General Description
A. Features(MSM6250A)
• The ARM926EJ-S microprocessor can operate at up to 180 MHz with variable rate, software
controlled clocks to provide greater standby time.
• Integrated PLL to provide additional on-chip clock frequencies
• Supports low-power, low-frequency crystal to enable TCXO shutoff
• Integrated USIM Controller for direct interface to USIM card
• Software-controlled power management feature
• Automatic access conversion of 32-bit data accesses to 16-bit devices
• Advanced 409-ball CSP packaging
• WCDMA Access
- Maximum of eight simultaneous transport channels
- Four coded composite transport channels (CCTrCH)
- PS data rates supporting 384kbps DL / 64kbps UL
• GSM/GPRS Access
- GSM/GPRS network signaling (from Layer 1 to 3)
- GSM AMR,EFR,FR
• Operation and Services
- SIM Interfaces
- General Purpose I/O (GPIO) Interface
- Dual Memory Buses(EBI1 & EBI2)
- JTAG
- RTC
• Data Communication
- UARTs (ACB, EDB (RS232))
- Slave USB
3. TECHNICAL BRIEF
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