SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 296

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

17.3
The three capture/compare channels associated with T12 may operate in center aligned
mode. The compare timer T12 counts up starting at 0000
match the respective compare value in register CC6x, the associated output signal CC6x
is switched to its active state (while counting up). Upon reaching the period value stored
in register T12P the count direction is reversed and the timer counts down. When the
timer contents match the respective compare value in register CC6x, the associated
output signal CC6x is switched to its passive state (while counting down).
The output signals COUT6x are switched upon matches of register CC6x with
T12 + T12OF. Non-zero offset values shift the COUT6x edges symmetrically against the
CC6x edges (see
pairs CC6x/COUT6x with arbitrary active levels. These signal pairs may e.g. be used to
drive the high and low side switches of a power bridge without the risk of a branch
shortcut (prevented by the programmable dead-time
Figure 17-6 Operation in Center Aligned Mode
Note: In order to generate correct dead times for PWM signals, the offset value stored
User’s Manual
in T12OF must be lower than the value stored in the compare registers.
The offset value affects all COUT6x outputs.
Dead time generation is available only in the full function module.
T12P = 7
T12OF = 2
T12 Start
CC6x
(Active High)
COUT6x
(Active High)
COUT6x
(Active Low)
CC6x = 5 (in this example)
Center Aligned Mode
Count Value
Figure
2
0
3
1
4
2
17-6). This allows the generation of non-overlapping signal
5
3
t
OFF
6
4
7
5
8
6
T12
9
7
8
6
17-7
7
5
T12+T12O
t
OFF
6
4
F
5
3
4
2
Capture/Compare Unit CAPCOM6
t
3
1
OFF
2
0
, see
3
1
H
. When the timer contents
4
2
Figure
5
3
t
OFF
6
4
C164CM/C164SM
7
5
MCT02603
17-6).
Duty
Cycles:
29%
57%
57%
Time
Derivatives
V1.0, 2002-02