Controller Section - Motorola APX 5000 Service Manual

Sec 2: 3-10
3.4

Controller Section

The controller section
two boards, which are the VOCON and EXPANSION boards. The main functional section consists of
a dual core ARM and DSP controller, Flash memory, and a Double Data Rate Synchronous Dynamic
Random Access Memory (DDR SDRAM). The Power and Clocks section includes a power
management IC (MAKO) and various external switching regulators, and two clock sources (12 MHz
and 24.576 MHz) from which all other controller digital clocks are derived. The Audio section has a
CODEC and a class-D audio power amplifier that provides the radio with a multiple microphone,
single speaker design. The User Interface section provides communication and control to the top
and main Liquid Crystal Displays (LCD) on the radio, as well as a keypad and a side connector
interface conforming to Universal Connector specifications. The Mace Expansion Board consists on
the main class-D audio power amplifier and the Type III secure IC (MACE). In addition to the Mace
features, the Mace with Apps Expansion Board consists of an e-MMC NAND Flash (4GB), a
combination integrated-circuit consisting of a Global Positioning System (GPS) receiver and a
Bluetooth (BT) 2.1 transceiver, an encryption processor (MACE), and a 3-axes digital accelerometer.
Top Display
Interface
Data Display &
KeyPad
Side
Connector
(See Figure 3-11.) comprises of five functional sections that are split among
Battery Supply
POWER & CLOCKS
Voltage Regulators
Clocks Sources:
12 Mhz
24.576 Mhz
USER INTERFACE
Top Display
Data Display
KeyPad
Expansion Board:
Side Connector
Figure 3-11. Controller Block Diagram
Basic Theory of Operation: Controller Section
RF Interface
CONTROLLERS & MEMORY
ARM Processor
Digital Signal Processor
Flash Memory
DDR Memory
Encryption Processor
EXPANSION MEMORY, BLUETOOTH/GPS
& ENCRYPTION PROCESSOR
Expansion Board
Expansion Board
(Basic Version):
(Full Version):
Encryption Processor
Encryption Processor
e-MMC NAND Flash (4GB)
Bluetooth
GPS
Accelerometer
AUDIO
Data Microphone
Expansion Board Audio:
Main Amplifier / Speaker
Main Microphone
Acc. Speaker
Acc. Microphone