MC68HC708MP16 Datasheet, PDF (247/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Timer Interface Module B (TIMB)
Table 12-2. Mode, Edge, and Level Selection
MSxB:MSxA
X0
X1
00
00
00
01
01
01
1X
1X
1X
ELSxB:ELSxA
00
00
01
10
11
01
10
11
01
10
11
Mode
Output Preset
Input Capture
Output Compare
or PWM
Buffered Output
Compare or
Buffered PWM
Configuration
Pin under Port Control;
Initial Output Level High
Pin under Port Control;
Initial Output Level Low
Capture on Rising Edge
Only
Capture on Falling Edge
Only
Capture on Rising or Falling
Edge
Toggle Output on Compare
Clear Output on Compare
Set Output on Compare
Toggle Output on Compare
Clear Output on Compare
Set Output on Compare
TOVx — Toggle-On-Overflow Bit
When channel x is an output compare channel, this read/write bit
controls the behavior of the channel x output when the TIMB counter
overflows. When channel x is an input capture channel, TOVx has no
effect. Reset clears the TOVx bit.
1 = Channel x pin toggles on TIMB counter overflow.
0 = Channel x pin does not toggle on TIMB counter overflow.
NOTE: When TOVx is set, a TIMB counter overflow takes precedence over a
channel x output compare if both occur at the same time.
CHxMAX — Channel x Maximum Duty Cycle Bit
When the TOVx bit is at logic 0, setting the CHxMAX bit forces the
duty cycle of buffered and unbuffered PWM signals to 100%. As
Figure 12-8 shows, the CHxMAX bit takes effect in the cycle after it
is set or cleared. The output stays at the 100% duty cycle level until
the cycle after CHxMAX is cleared.
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor
Timer Interface Module B (TIMB)
Technical Data
247