LG -P970 Service Manual page 58

3.9.11 Clocking
The clocking system is based on 2 different clocks, a 26 MHz reference clock generated within the RF Engine and
a 32 kHz real-time clock (RTC) generated in the baseband.The 26 MHz clock provided by the RF engine is the
main reference clock for the RF circuit and the X-GOLD™616. Also other system components may be supplied
with 26 MHz reference clocks. A 32 kHz oscillator located at the X-GOLD™616 supplies the RTC with the reference
clock for the real time clock application, as well as provides a low power standby clock for system sleep mode
operation. This clock is available
also for other system components like GPS.
3.9.12 USB
The XMM™6160 platform provides two USB interfaces compliant to the USB2.0 standard:
• High speed interface (480 Mbps) for communication with external devices acting both as host or device
• Full speed interface (12 Mbps) for communication with the UICC using the IC-USB standard acting as host
The USB solution is based on USB controller hardware IP, which is integrated in the X-GOLD™616 baseband chip including
both USB transceivers for high and full speed and the USB Stack software that implements the different USB device classes
and features.
The HS OTG USB component supports the following features:
• Modem connection for DialUp Networking and AT command interface (CDC-ACM)
• Tracing over USB (CDC-ACM)
• Suspend/Resume and Remote Wakeup (for power saving)
• Software download
Optional features (not included in the XMM™6160 platform):
• Support for isochronous transfers
The IC-USB component supports the following features:
• UICC-Terminal USB interface according to ETSI TS 102 600 (ICCD only)
•Suspend/Resume and Remote Wakeup (for power saving)
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3. TECHNICAL BRIEF
Only for training and service purposes