Datasheet

Alternate RAMP2 (RAMP2A) Operation
Alternate RAMP2 operation is similar to RAMP2, but CC0 controls both WO[0] and WO[1] waveforms
when the corresponding circular buffer option is enabled (CIPEREN=1). The waveform polarity is the
same on both outputs. Channel 1 can be used in capture mode.
Figure 31-19. RAMP2 Alternate Operation
COUNT
"match"
ZERO
"clear" update
A B A BRamp
WO[0]
WO[1]
TOP(A)
TOP(B)
CC0(A)
CC0(B)
TOP(B)
CC0(A)
CC0(B)
Retrigger
on
FaultA
CIPEREN = 1
POL0 = 1
CICCEN0 = 1
FaultA input
Keep on FaultB
FaultB input
Critical RAMP2 (RAMP2C) Operation
Critical RAMP2 operation provides a way to cover RAMP2 operation requirements without the update
constraint associated with the use of circular buffers. In this mode, CC0 is controlling the period of ramp A
and PER is controlling the period of ramp B. When using more than two channels, WO[0] output is
controlled by CC2 (HIGH) and CC0 (LOW). On TCC with 2 channels, a pulse on WO[0] will last the entire
period of ramp A, if WAVE.POL0=0.
Figure 31-20. RAMP2 Critical Operation With More Than 2 Channels
COUNT
"match"
ZERO
"clear" update
A B A B
Ramp
WO[0]
WO[1]
CC0
TOP
CC2
CC1
TOP
CC2
CC1
Retrigger
on
FaultA
Keep on FaultB
POL2 = 1
POL1 = 1
FaultA input
FaultB input
SAM D21 Family
TCC – Timer/Counter for Control Applications
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 725