Chameleon-PIC Nurve Networks, Chameleon-PIC Datasheet - Page 36

• Manufacturer Part Number: Chameleon-PIC
• Description: MCU, MPU & DSP Development Tools PIC24 & PROPELLER DEV SYSTEM (SBC)
• Manufacturer: Nurve Networks

Specifications of Chameleon-PIC

• Processor To Be Evaluated: PIC24
• Data Bus Width: 16 bit
• Interface Type: USB, VGA, PS/2, I2C, ISP, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 NURVE NETWORKS LLC “Exploring the Chameleon PIC 16-Bit”
7.0 Microchip PIC24 Subsystem
Figure 7.1 – The PIC24 Subsystem (not including SPI mux).
Referring to Figure 7.1, you can see the schematic uses the PIC24HJ128GP502. The chip is very simple to interface, just
power and an external XTAL (which is removable) at 5 MHz. We mentioned that the clock runs at 40 MHz so how can we
possibly be using a 5 MHz XTAL? The answer is that the PIC has an onboard Phase-Locked-Loop (PLL) that can multiply
the incoming clock and increase the rate of execution. Take note of the SPI interface lines on the right, these are very
important since they are used to communicate with the Propeller chip as well as the on board 1MB FLASH.
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