LG -A100 Service Manual page 16

Crystal Oscillator
• Fully digital controlled crystal oscillator core with a highly linear tuning characteristic
Mixed Signal and Power Management Unit
• Embedded stepdown converter (1.8V)
• DC/DC boost for voltages up to 15 V for driving White or Blue LEDs
• 8- loud speaker driver (700 mW)
• 16- earpiece driver
• 32- headset driver
• Measurement interfaces (PA temperature, battery voltage, battery temperature, and ambient temperature)
• Accessory Detection
• PCB ID detection as part of measurement interface.
• Differential microphone input
• System start up circuitry
• Charger circuitry for NiCd, NiMh and LiIon cells with integrated Control Current/Voltage Charging.
• Integrated regulators for direct connection to battery.
C166S-V2 Buses
The C166S-V2 is connected to four buses:
1. IMB (Internal Program) bus (64b - 0 cycle instruction bus))
2. DPMI (Data-Program) Bus (16b - 0 cycle data bus)
3. X-Bus (16b - 3 cycle peripheral bus)
4. PD-Bus (16b 0 cycle peripheral bus)
Bus Interconnections
The interconnection between the X-Bus and the TEAKlite Bus uses:
• Multicore Synchronization
• Shared Memory.
LGE Internal Use Only - 16 - Copyright © 011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
Only for training and service purposes