CY545 Stepper System Controller
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Clock Circuits
The CY545 may be operated with crystal or external clock circuits. These two options are
shown in Figure 18.2. All timing discussed in this manual assumes an 11.059 MHz series
resonant crystal. Note that 11.0 MHz, such as a CTS Knights MP110 or equivalent will work
fine. The CY545 requires an 11 MHz clock in order to generate the standard baud rates,
although any crystal in the allowable range can be used with the adaptive mode, within the
timing resolution limits of the CY545. Use 7.3728 MHz to make the fastest possible rate a
standard 38400 baud, or 14.7456 MHz for 76,800 baud.
© 2002 Cybernetic Micro Systems
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Chapter 18 - Electrical Specifications
ETC [ ETC ]
