C508_01 Datasheet, PDF (149/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
6.3.4 Combined Multi-Channel PWM Modes
The CCU of the C508 has been designed to support also motor control or inverter
applications which have a demand for specific multi-channel PWM signal generation. In
these combined multi-channel PWM modes the CAPCOM unit (Compare Timer 1) and
the COMP unit (Compare Timer 2) of the C508 CCU are working together.
In the combined multi-channel PWM modes the signal generation of the CCx and
COUTx PWM outputs can basically be controlled either by the interrupt inputs INT0 to
INT2 (block commutation mode) or by the operation of Compare Timer 1 or by software
(multi-channel PWM mode). In the active phase of a combined multi-channel PWM
mode, Compare Timer 1 compare output signal or the Compare Timer 2 output signal or
both can be switched selectively to the CCx or COUTx PWM output lines.
The combined multi-channel PWM modes are controlled by the BCON (block
commutation control) register. Figure 6-33 shows the block diagram of the multi-channel
PWM mode logic which is integrated in the C508.
Combined
INT0
Multi-Channel
PWM
INT1
Control
INT2
(BCON)
Capture
Interrupt
Period/
Comp. Match
Interrupt
Channel 0 in
Capture Mode
16-Bit
Compare
Timer 1
CCU
Emergency
Interrupt
PWM
10-Bit
Compare
Timer 2
Trap Control
Port 1
Control
Logic
CTRAP
CC0
CC1
CC2
COUT0
COUT1
COUT2
COUT3
MCB02608
Figure 6-33 Block Diagram of the Combined Multi-Channel PWM Modes
User’s Manual
6-84
2001-05