Table 3-5. Controller Clock Distribution - Motorola APX 1000 Detailed Service Manual

Theory of Operation
: Controller
Clock Frequency
Source
Y6501 24.576 MHz
Y6502 32.768 kHz
Y6601 12 MHz
U6302 96 MHz
U6101 4.096 MHz
U6101 32.768 kHz
Y701 16.8 MHz
(RF
board)
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

Type Description
Crystal MAKO 24 MHz & tapped into
Oscillator CPLD
Crystal MAKO RTC
Oscillator
Crystal OMAP CPU Clock
Oscillator
OMAP GPIO DDR Clocks
(Complementary signals)
CPLD GPIO MACE Clock
CPLD GPIO OMAP Boot-Up clock & GPS/
Bluetooth digital clock
Crystal RF Frequency Synthesizer
Oscillator IC (Trident) TCXO
Clock Recipient Suggested Probe
U6501, U6101 R6574
U6501 C6541
U6302 C6601
U6301 TP6307 & TP6308
U2510 (to Keypad R6113
Board)
U6302 & U2401 R6114 (GPS/BT) &
(Keypad Board) R6115 (OMAP)
U6302 R6218
3-33
Points