C508_01 Datasheet, PDF (150/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
In block commutation mode, a well defined incoming digital signal pattern of e.g. hall
sensor signals, which are applied to the INT0-2 inputs, is sampled. Each transition at the
INT0-2 inputs results in a change of the state of the PWM outputs. In block commutation
mode, all six PWM output signals CCx and COUTx (x = 0-2) are outputs. According to a
block commutation table (Table 6-10), the outputs CCx are put either to a low or high
state while the outputs COUTx are switched to the PWM signal which is generated by
the 10-bit Compare Timer 2 (COMP unit).
For monitoring of sensor input signal timing in block commutation mode, the signal
transitions at INT0-2 can also generate an interrupt (if enabled) and a capture event at
channel 0 of the CAPCOM unit (Compare Timer 1). For emergency cases, (trap function
of CTRAP input signal) the six outputs CCx and COUTx can be put selectively to the
levels as defined by the first six bits in COTRAP register.
At the multi-channel PWM modes of the C508, a change of the PWM output states
(active or inactive) is triggered by Compare Timer 1, which is running either in operating
mode 0 or 1. If its count value reaches 0000_H, the PWM output signal changes its state
according to a well defined state table. The multi-channel PWM modes consists of three
modes:
– 4-phase multi-channel PWM mode (4 PWM output signals)
– 5-phase multi-channel PWM mode (5 PWM output signals)
– 6-phase multi-channel PWM mode (6 PWM output signals)
User’s Manual
6-85
2001-05