sak-c868p-1rr Infineon Technologies Corporation, sak-c868p-1rr Datasheet - Page 83
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sak-c868p-1rr
Manufacturer Part Number
sak-c868p-1rr
Description
8 - Bit Cmos Microcontroller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.SAK-C868P-1RR.pdf
(266 pages)
- Current page: 83 of 266
- Download datasheet (4Mb)
Figure 4-17
The events triggering the set and reset action of the CC6xST bits have to be combined,
see
the setting of CC6xS in register CMPMODIF also leads to a set action of bit CC6xST,
whereas the negative edge at pin CCPOSx (in hysteresis-like mode, signal hyst_x_ev)
or the setting of bit CC6xR leads to reset action.
The set signal is only generated while bit CC6xST is reset, a reset can only take place
while the bit is set. This permits the OR-combination of the resulting set and reset signals
to one common signal (DTCx_rl) triggering the reload of the dead-time counter. It is only
triggered if bit CC6xST is changed, permitting a correct PWM generation with dead-time
and the complete duty cycle range of 0% to 100% in edge-aligned and in center-aligned
mode.
In the case that the dead-time generation is enabled, the change of bit CC6xST triggers
the dead-time unit and a signal DTCx_o is generated. The length of the ’0’ level of this
signal corresponds to the desired dead-time, which is used to delay the rising edge
(passive to active edge) of the output signal.
In order to generate independent PWM patterns for the highside and the lowside
switches of the power inverter, the interval when a PWM signal should be active can be
selected by the bits CC6xPS. They select if the PWM signal is active while the compare
state bit is ’0’ (T12 counter value below the compare value) or while it is ’1’ (T12 counter
value above the compare value).
User’s Manual
Cap_xST_so
T12_xST_so
Hall_edge_o
T12_xST_ro
Figure
hyst_x_ev
CC6xR
CC6xS
4-17. The occurrence of the selected capture event (signal Cap_xST_so) or
T12 Logic for CC6xST Control
O
R
O
R
DTCx_rl
A
N
D
A
N
D
OR
dead-time generation
hyst_x_state
set
reset
CC6xST
4-39
T12clk
Q
Q
On-Chip Peripheral Components
DTCx_o
A
N
D
A
N
D
COUT6xPS
CC6xPS
V 1.0, 2003-01
COUT6x_
0
1
0
1
CC6x_
T12_o
T12_o
C868
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