LG U250 Service Manual page 27

3. TECHNICAL BRIEF
• Integrated handset-level user interfaces
- Four programmable current sinks recommended as keypad backlight, LCD backlight, camera flash,
and general-purpose drivers
- Vibration motor driver programmable from 1.2 to 3.1V in 100 mV increments
- Speaker driver with programmable gain, turn-on time, and muting; differential operation (drives
external 8 Ω speakers with volume controlled 500 mW)
• IC-level interfaces
- MSM device-compatible 3-line SBI for efficient initialization, status, and control
- Supports the MSM device's interrupt processing with an internal interrupt manager
- Many functions monitored and reported through real-time and interrupt status signals
- Dedicated circuits for controlled power-on sequencing, including the MSM device's reset signal
- Several events continuously monitored for triggering power-on/power-off sequences
- Supports and orchestrates soft resets
- USB-OTG transceiver for full-speed (12 Mb/s) and low speed (1.5 Mb/s) interfacing of the MSM
device to computers as a USB peripheral, or connecting the MSM device to other peripherals -
RUIM level translators enable MSM device interfacing with external modules
• Twelve multi-purpose pins that can be configured as digital or analog I/Os, bi-directional I/Os, or
current sinks. Default functions support the RUIM level translators, power-on circuits, analog
multiplexer inputs, an LED driver, and a reference voltage buffer.
• Highly integrated functionality in a small package - 84-pin BCCS with a large center slug for electrical
ground, mechanical stability, and thermal relief
[Figure 1.6] MSM6245 Interface
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