LG U990 Service Manual page 75

3. TECHNICAL BRIEF
3.11.12 USB
• USB 2.0 High speed/full speed
• USB On The Go
• USB applications:
- USB mass storage
- PictBridge
- Webcam
3.11.13 Host Port
• Two flavors:
- Generic interface 8/16-bit Intel style.
Connects as memory map (4-bit address)
- LCD like 8/9/16 bit multiplexed bus.
Connects as an LCD (1-bit address)
3.11.14 Clocks
• Main clock input frequency, 10 to 31 MHz:
- Directly from system PMU main clock and bypass its control
- Embedded crystal oscillator (12Mhz)
- Optional GPS TCXO
• Four configurable clock-out pins to drive external components:
(e.g. Audio codec, Sensor, PWM)
3.11.15 Boot
• Host boot
• Standalone boot
3.11.16 Debug
• JTAG for code debug
• UART for fast system ramp up
3.11.17 Power
• Very low power consumption, smaller than150mW for all intense multimedia applications.
• Low power sleep mode 100 µW
- Host can control display audio and peripherals via bypass
• Light sleep mode 500uW
- Specifically for GPS accurate off-line tracking
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
- 76 -
Only for training and service purposes