Subsystem; Arm Microprocessor Subsystem - LG -P990 Service Manual

3. TECHNICAL BRIEF
3.9 Subsystem (PMB9801_X-GOLD 616)
TM

3.9.1 ARM Microprocessor Subsystem

The ARM1176JZ-S incorporates an integer unit that implements the ARM11 ARM architecture v6. The core
supports the 32-bit ARM and 16-bit Thumb instruction sets, Jazelle technology to enable direct execution of Java
byte codes and a range of SIMD DSP instructions that operate on 16-bit or 8bit values in 32-bit registers.
3.9.2 WCDMA Subsystem
The 3.5G cellular modem is implemented as an independent Layer1 subsystem including a separate
microcontroller. The X-GOLDTM616 Modem core acts as a master controlling the 3.5G cellular Modem slave via
the Layer1 host controller interface.
3.9.3 GSM Subsystem
The X-GOLDTM616 is suited for mobile stateons operating in the GSM850/900/1800/1900 band. In the receiver
path the antenna input signal is converted to the base band, filtered, and amplified to target level by the RF
transceiver chip set. Tne modem processor performs for both, GMSK and 8-PSK, the complex baseband signal
equalization with soft-output recovery and the channel decoding supported by a Viterbi hardware accelerator.
3.9.4 RF Interface
The RF interface communicates with the mobile station's external RF and analog baseband circuits. Signals to
these circuits control signal gain in the Rx and Tx signal path and maintain The system's frequency reference.
3.9.5 SPI based IPC
The XMM™6160 platform supports the serial connection via SPI. The command flow of the IPC is independent
from the HW solution and the IPC protocol. It is implemented using a logical channel multiplexer and AT
commands.
The IPC hardware interface consists of a serial SPI interface and two control signals, and one additional optional
control signal. The SPI is implemented using the USIF2 of the X-GOLD™616, with the GPIO's implementing sleep
mode and readiness handling
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