Intel 8XC196K Series User Manual page 131

8XC196K x , J x , CA USER'S MANUAL
EPA0_TIME = EPA0_TIME + T1 EPA0_TIME = EPA0_TIME + T1
Figure 5-17. EPA and PTS Operations for the PWM Toggle Mode Example
Software can change the duty cycle during the PWM operation. When a duty cycle change is re-
quired, the program writes new values of T1 and T2 – T1 to CSTORE1 and CSTORE2 and selects
normal interrupt service for the next EPA0 interrupt. When the next timer match occurs, the out-
put is toggled, and the device executes a normal interrupt service routine, which performs these
operations:
1. The routine writes the new value of T1 (in CSTORE1) to PTSCONST1 and the new value
of T1 – T2 (in CSTORE2) to PTSCONST2.
2. It selects PTS service for the EPA0 interrupt.
5-36
Start Start
Timer Timer
No No
Match Match
? ?
Yes Yes
Toggle Output Toggle Output
= 0 = 0
TBIT TBIT
EPA0_TIME = EPA0_TIME + (T2 - T1) EPA0_TIME = EPA0_TIME + (T2 - T1)
Toggle TBIT Toggle TBIT
EPA EPA
PTS Cycle PTS
= 1 = 1
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