LG GB108, Service Manual

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3.1.6 C166S Buses
The C166S is connected to three buses:
1. Local Memory (LM) bus
2. X-Bus
3. PD-Bus.
3.1.7 TEAKLite Bus
The TEAKlite is connected to the TEAKlite bus.
3.1.8 Bus Interconnections
The interconnection between the X-Bus and the TEAKlite Bus uses:
• Multicore Synchronization
• Shared Memory.
3.1.9 Clock Concept
The E-GOLDvoice has a flexible clock control.
3.1.10 Interrupt Concept
The C166 MCU carries out the E-GOLDvoice interrupt system.
3.1.11 Debug Concept
The E-GOLDvoice 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.
3.1.12 C166 Debug Concept
The debugging of the C166 uses the OCDS and the Cerberus.
3.1.13 TEAKLite Debug Concept
TEAKlite debugging uses the OCEM and the SEIB.
3.1.14 Power Management
The E-GOLDvoice 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.
A charger control circuit charges NiCd, NiMH and LiIon batteries. The charger control supports
hardware controlled pre-charging and software controlled charging. It offers a wide charger
voltage range, making halfwave/ full-wave charging with cheap transformers possible.
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.