C508_01 Datasheet, PDF (122/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
6.3.2.5 Burst Mode of CAPCOM / COMP Unit
In burst mode, both units of the CCU are combined in a way that the CAPCOM outputs
COUTx or CCx and COUTx (controlled by bit BCMP in SFR BCON) are modulated by
the output signal of the COMP unit. Using the burst mode, the CAPCOM unit operates
in compare mode and the COMP unit provides a PWM signal which is switched to the
COUTx outputs. This PWM signal typically has a higher frequency than the compare
output signal of the CAPCOM unit. Figure 6-30 shows the waveform generation using
the burst mode.
Count Value
Period
Register
Compare
Register
Compare
Timer 1
Start of CT1
COUTx
(COINI = 1)
COUTx
(COINI = 0)
Compare
Timer 2
COUT3
COUTx
(COINI = 1)
(CT1OFF = 0)
COUTx
(COINI = 0)
Note: If the Bits COUT3I and COUTXI in the COINI register are identical,
COUT3 and the burst signals at COUTx have the same polarity.
Time
CMSELx3 = 0
Burst Mode
Disabled
COUT3I = 0
COUTXI = 0
COUT3I = 0
COUTXI = 1
COUT3I = 1
COUTXI = 1
COUT3I = 1
COUTXI = 0
MCT04295
Figure 6-30 Burst Mode Operation
User’s Manual
6-57
2001-05