C164CM_2 Datasheet, PDF (212/470 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

C164CM/C164SM
Derivatives
General Purpose Timer Unit
The reload mode triggered by T3OTL can be used in a number of different
configurations. The following functions can be performed, depending on the selected
active transition:
• If both a positive and a negative transition of T3OTL are selected to trigger a reload,
the core timer will be reloaded with the contents of the auxiliary timer each time it
overflows or underflows. This is the standard reload mode (reload on overflow/
underflow).
• If either a positive or a negative transition of T3OTL is selected to trigger a reload, the
core timer will be reloaded with the contents of the auxiliary timer on every second
overflow or underflow.
• Using this “single-transition” mode for both auxiliary timers allows very flexible Pulse
Width Modulation (PWM). One of the auxiliary timers is programmed to reload the
core timer on a positive transition of T3OTL, the other is programmed for a reload on
a negative transition of T3OTL. With this combination, the core timer is alternately
reloaded from the two auxiliary timers.
Note: Although possible, selecting the same reload trigger event for both auxiliary timers
should be avoided. In such a case, both reload registers would try to load the core
timer at the same time. If this combination is selected, T2 is disregarded and the
contents of T4 is reloaded.
User’s Manual
10-18
V1.0, 2002-02