PCL6045B Datasheet, PDF (101/176 Pages) List of Unclassifed Manufacturers – User Manual For PCL6045B Pulse Control LSI

10-4. Example of setting up an acceleration/deceleration speed pattern
Ex. Reference clock = 19.6608 MHz
When the start speed =10 pps, the operation speed =100 kpps, and the accel/decel time = 300 msec,
1) Select the 2x mode for multiplier rate in order to get 100 kpps output
PRMG = 149 (95h)
2) Since the 2x mode is selected to get an operation speed 100 kpps,
PRFH = 50000 (C350h)
3) In order to set a start speed of 10 pps, the rate magnification is set to the 2x mode.
PRFL = 5 (0005h)
4) In order to make the acceleration/deceleration time 300 msec, set PRUR = 28,494, from the equation
for the acceleration time and the RUR value.
Acceleration time [s] =
(PRFH - PRFL) x (PRUR + 1) x 4
Reference clock frequency [Hz]
0.3 =
(50000 - 5) x (PRUR + 1) x 4
19.6608 x 10⁶
PRUR = 28.494
However, since only integers can be entered for PRUR, use 28 or 29. The actual
acceleration/deceleration time will be 295 msec if PRUR = 28, or 305 msec if PRUR = 29.
An example of the speed pattern when PRUR = 29
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