Timing specifying device, image forming apparatus, motor drive device, and timing-signal output method
AssigneeOki Electric Industry Co., Ltd.
InventorYosuke Fujii
Life of this patent
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Abstract
A timing specifying device includes count processing circuitry to count an input reference clock; and timing control circuitry configured to set a parameter having an integer part and a fractional part in the count processing circuitry. The count processing circuitry counts the reference clock, outputs a timing signal indicating that a time corresponding to an integer value has passed, and counts a value corresponding to the fractional part at a timing at which the timing signal is output. The integer value is a value indicated by the integer part. The count processing circuitry stops counting of the reference clock when a value obtained by counting the value corresponding to the fractional part carries over from a fraction.
Claims8
A timing specifying device comprising:
- count processing circuitry to count an input reference clock;
- and
- timing control circuitry to set a parameter having an integer part and a fractional part in the count processing circuitry, wherein
- the count processing circuitry is configured to
- count one clock cycle of the reference clock as an integer number of one,
- output a timing signal indicating that a time corresponding to an integer value has passed,
- output a value corresponding to the fractional part at a timing at which the timing signal is output, the integer value being a value indicated by the integer part, and
- omit to count one clock cycle of the reference clock when a value obtained by counting the value corresponding to the fractional part carries over from a fraction.
A timing-signal output method comprising:
- counting an input reference clock by counting one clock cycle of the reference clock as one value
- outputting a timing signal indicating that a time corresponding to an integer value has passed, the integer value being a value indicated by an integer part of a set parameter;
- counting a value corresponding to a fractional part of the parameter at a timing at which the timing signal is output;
- and
- omitting to count one clock of the reference clock when a value obtained by counting the value corresponding to the fractional part carries over from a fraction.
Dependencies are inferred from the claim text.