Motorola APX 2000 - Table 3-5. Controller Clock Distribution

Theory of Operation: Controller 3-33
3.2.4 OMAP Processor and Memory
3.2.4.1 OMAP Processor (U6302)
The OMAP1710 dual core processor lies at the center of the controller design. The processor
features utilized in the controller design include:
• ARM9 CPU core
• C55X DSP core
• 16KB shared internal RAM
• SSI Interfaces
• USB Interfaces
• Timers & Watchdog Timers
• Keyboard Matrix Interface
• 1-Wire Interface
• LCD Controller
• I2C Interface
• SPI interface
• External Memory Synchronous Interface
• External Memory Asynchronous Interface
•UARTs
•GPIOs
Table 3-5. Controller Clock Distribution
Clock
Source
Frequency Type Description Clock Recipient Suggested Probe
Points
Y6501 24.576 MHz Crystal
Oscillator
MAKO 24 MHz & tapped into
CPLD
U6501, U6101 R6574
Y6502 32.768 kHz Crystal
Oscillator
MAKO RTC U6501 C6541
Y6601 12 MHz Crystal
Oscillator
OMAP CPU Clock U6302 C6601
U6302 96 MHz OMAP GPIO DDR Clocks
(Complementary signals)
U6301 TP6307 & TP6308
U6101 4.096 MHz CPLD GPIO MACE Clock U2510 (to Keypad
Board)
R6113
U6101 32.768 kHz CPLD GPIO OMAP Boot-Up clock & GPS/
Bluetooth digital clock
U6302 & U2401
(Keypad Board)
R6114 (GPS/BT) &
R6115 (OMAP)
Y701
(RF
board)
16.8 MHz Crystal
Oscillator
RF Frequency Synthesizer
IC (Trident) TCXO
U6302 R6218