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Digital control board documentation (view source)
Revision as of 17:59, 16 June 2009
, 17:59, 16 June 2009→Crystal Oscillator
=== Crystal Oscillator ===
=== Crystal Oscillator ===
The CP2201 is responsible for driving the 20MHz crystal oscillator. This oscillator clocks both the CP2201 and the FPGA. The crystal oscillator can be found above the right corner of the FPGA. It can be identified by its four surface mount pads and roughly .3" length. It is labelled Y1, though this label is not visible after the oscillator is soldered on. The CP2201 uses an inverting driver to excite the crystal. The output of hte crystal is then sent to the CP2201 and the FPGA.
The CP2201 is responsible for driving the 20MHz crystal oscillator. This oscillator clocks both the CP2201 and the FPGA. The crystal oscillator can be found above the right corner of the FPGA. It can be identified by its four surface mount pads and roughly .3" length. It is labelled Y1, though this label is not visible after the oscillator is soldered on. The CP2201 uses an inverting driver to excite the crystal. The output of the crystal is then sent to the CP2201 and the FPGA.
=== Bus Format and Multiplexing ===
=== Bus Format and Multiplexing ===