LG GB110, Service Manual

Page: 18 / 142

18
Bus Interconnections
The interconnection between the X-Bus and the TEAKlite Bus uses:
• Multicore Synchronization
• Shared Memory.
3.1.6 Clock Concept
The X-GOLDTM102 has a flexible clock control.
3.1.7 Interrupt Concept
The C166 MCU carries out the X-GOLDTM102 interrupt system.
3.1.8 Debug Concept
The X-GOLDTM102 includes a multi-core debug. The C166 and TEAKlite cores can be debugged
in parallel with:
• A single JTAG port (that is, on a single host)
• Mutual breakpoint control.
C166 Debug Concept
The debugging of the C166 uses the OCDS and the Cerberus.
The X-GOLDTM102 also inlcudes a Real Time Trace module for software debugging.
TEAKLite Debug Concept
TEAKlite debugging uses the OCEM and the SEIB.
3.1.9 Power Management
The X-GOLDTM102 provides the power management unit (PMU) for the complete mobile phone
application. The integrated PMU is directly connected to the battery and provides a set of linear
voltage regulators (LDO’s). These LDO’s generate all required supply voltages and currents
needed in a low feature mobile phone.
The charger unit controls the charging of NiCd, NiMh, LiPolymer and LiON batteries. Only a few
external parts are required to support charging from a DC wall adaptor. In addition, the charger
generates the power-on reset after battery insertion or charger connection. The supported battery
voltage range is 3.1 to 5.1 V for NiCd/NiMH and 3.1 to 4.6 V for LiPolymer and LiON batteries. The
upper voltage limit is programmable.The charger supports constant current precharging,
full-charging (pulsed charging) and software controlled constant current charging. The charging
functions are protected by hardware timer. Charger idle voltages up to 20 V can be handled. An
integrated overvoltage protection protects batteries and system against overvoltage.
White/blue backlight generation is supported with a special driver for very a low external parts
count. Power consumption during operation phases is minimized due to flexible clock switching
In the Standby Mode most parts of the device are switched off, only a small part is running at
32kHz and the
controller RAM is switched to a power saving mode. The TEAKLite ROM can be switched off
during Standby via SW.
This Units (associated to the Measurement Unit) provides also support for a accessory
detection .