Figure 6.8-14 Immediately Loading In Up-Count Mode - Nuvoton ISD94124BYI Technical Reference Manual

Isd arm cortex-m4f soc

Table of Contents

PERIOD DATA0

PERIOD DATA0

PERIOD DATA1

PERIOD DATA0

CMPDAT DATA1

PERIOD DATA2

CMPDAT DATA0

6.8.5.10 Window Loading Mode

When the WINLDENn (PWM_CTL0[13:8]) bit is set to 1, PWM operates at window loading mode.

In Window loading mode, CLKPSC(PWM_CLKPSCn_m[11:0]), PERIOD(PWM_PERIODn[15:0])

and CMP(PWM_CMPDATn[15:0]) will all load to their active CPSCBUF, PBUF and CMPBUF

registers while each period is completed, but all loading are valid only when load window is opened.

Every channel n's load window is opened by setting the corresponding LOADn (PWM_LOAD[5:0])

to 1, and hardware will close the window at the end of PWM period. Figure 6.8-15 shows an example

and its steps sequence is described below.

1. Software writes CMPDAT DATA1 at point 1, and the load window is not opened at this period

so CMPDAT will not load to CMPBUF.

2. Software writes LOAD to open the load window at point2.

3. Software writes PERIOD DATA1 at point 3.

4. At point 4, load window has been opened, hardware loads CLKPSC DATA1, PERIOD DATA1

and CMPDAT DATA1 to their buffer and closes the load window at the end of PWM period.

5. Software writes PERIOD DATA2 at point 5.

6. Hardware loads CLKPSC DATA2, PERIOD DATA2 to PBUF at the end of PWM period at point

7. Software writes PERIOD DATA3 at point 7.

8. Software writes LOAD to open the load window at point8.

9. Hardware loads CLKPSC DATA3 and PERIOD DATA3 to their buffer and closes the load

window at the end of PWM period at point 9.

ISD94100 Series Technical Reference Manual

PERIOD DATA1