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6.14. Oscillator Sources
A crystal oscillator is fitted on the RDK and used to supply the main clock input to the Renesas microcontroller. Table
6-12 details the oscillators that are fitted and alternative footprints provided on this RDK:
Component
Crystal (X1)
Crystal (X2)
Oscillator (Y1)
Oscillator (Y2)
Function
CPU/USB Clock
E10A Processor
Ethernet Clock
E10A System
Frequency
12 MHz
16 MHz
25 MHz
40 MHz
Table 6-12: Oscillators / Resonators
6.15. Reset Circuit
The CPU Board includes a Reset IC M51957 (U6) to meet the minimum reset period of the MCU. Please refer to the
hardware manual for more information on the requirements of the reset circuit. Please check the reset requirements
carefully to ensure the reset circuit on the user’s board meets all the reset timing requirements.
6.16. Total Phase Beagle Debug Header
The Beagle I2C/SPI Protocol Analyzer is a non-intrusive USB-based bus monitor that can capture, display, and filter I2C
and SPI data as it appears on the bus. Using both the Data Center Software and Beagle analyzer, users can easily view
I2C bus traffic (up to 4 MHz) and SPI bus traffic (up to 24 Mhz) in real time. Additional functionality allows engineers to
filter data against a wide variety of parameters, or instantly search for specific hexadecimal or ASCII data patterns
during a live capture. The Beagle analyzer is fully supported on Windows, Linux, and Mac OS X, and comes with free
software, free APIs, free technical support, and free software/firmware upgrades.
Total Phase manufactures powerful and affordable USB, I2C, SPI, and CAN tools for embedded systems engineers.
The complete line of Total Phase host adapters and protocol analyzers are the development and debugging tools of
choice for Fortune 500 companies, small businesses, and research institutions all over the world.
For more technical information, online demos, and ordering information, visit www.totalphase.com .
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