LG U990 Service Manual page 29

3. TECHNICAL BRIEF
• IC-level interfaces
- MSM device-compatible 3-line SBI for efficient initialization, status, and control
- Supports the MSM devices 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 devices 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
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