Datasheet

As shown in Figure 31-35, the 8-bit dead-time counter is decremented by one for each peripheral clock
cycle until it reaches zero. A non-zero counter value will force both the low side and high side outputs into
their OFF state. When the output matrix (OTMX) output changes, the dead-time counter is reloaded
according to the edge of the input. When the output changes from low to high (positive edge) it initiates a
counter reload of the DTLS register. When the output changes from high to low (negative edge) it reloads
the DTHS register.
Figure 31-35. Dead-Time Generator Timing Diagram
"dti_cnt"
"OTMX output"
"DTLS"
"DTHS"
t
DTILS
t
DTIHS
T
t
P
The pattern generator unit produces a synchronized bit pattern across the port pins it is connected to.
The pattern generation features are primarily intended for handling the commutation sequence in
brushless DC motors (BLDC), stepper motors, and full bridge control. See also Figure 31-36.
Figure 31-36. Pattern Generator Block Diagram
COUNT
UPDATE
BV BVPGEB[7:0]
PGE[7:0]
PGVB[7:0]
PGV[7:0]
SWAP output
ENEN
WOx[7:0]
As with other double-buffered timer/counter registers, the register update is synchronized to the UPDATE
condition set by the timer/counter waveform generation operation. If synchronization is not required by
the application, the software can simply access directly the PATT.PGE, PATT.PGV bits registers.
SAM D21 Family
TCC – Timer/Counter for Control Applications
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 735