Control Section; Major Features - RCA RDR9000 Service Manual

Service Manual 3. Baseband Section

3.2 Control Section

The control platform is composed of two OMAP-L138 processors for the repeater unit and the
MCU for the control head. The OMAP-L138 processor has a dual-core architecture which
incorporates an ARM926EJ-S core and a TMS320C674x DSP core. ARM926EJ-S is the main
controller, while TMS320C674xDSP is used for modulation/demodulation and voice
encoding/decoding. OMAP-L138 has powerful processing capacity at the maximum of 375
MHz operating frequency. Multiple interfaces are available on the processor for connecting to
various peripherals. Two OMAP-L138 processors allows parallel processing of TX/RX control
and data processing, provides powerful data processing and relay capacity, which ensures
high-speed service replay.
The MCU for the front panel is an ARM Cortex-M3 core and it works with a SDRAM memory
and a flash memory to control key operation, external data interface, and LCD display.
DC-DC and LDO regulators are adopted to generate appropriate power supply to the
hardware platform. The Class AB BTL amplifier is used to amplify the output audio signal.

3.2.1 Major Features

 Sleep and system clocks
 NOR flash and mobile DDRAM interface
 LCM interface
 PLL interface
 IF processor interface
 DAC interface
 RTC interface
 GPS interface
 Bluetooth interface
 Keypad interface
 Tuning interface
 GPIO interface
 MAC interface
 Audio input and output interface
 Option board interface
 Front panel interface
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