Compare Units
precise control of gate timing requirements. In addition, the dead time is typically specified with
a single program variable that is easily changed for different power converters or adapted on-line.
Dead
Dead
-
-
Band Timer Control Register
Band Timer Control Register
(EVA)
(EVA)
DBTCONA @ 0x007415
DBTCONA @ 0x007415
(lab file:
(lab file:
Ev
Ev
.c)
.c)
EDBT3
76 54 2 0
EDBT2 EDBT1 DBTPS2 DBTPS1 reservedreserved
13
15 14 13 12 10 8
DBT3 DBT0DBT1DBT2
911
DB Timer Enable
0 = disable
1 = enable
DB Timer Prescaler
000 = 1 100 = 16
001 = 2 101 = 32
010 = 4 110 = 32
011 = 8 111 = 32
DB Timer Period
dead time = DB period * DB prescaler * CPUCLK period
reserved reserved reserved reserved
DBTPS0
Each compare unit has its own dead-band timer, but shares the clock prescaler unit and the dead-
band period with the other compare units. Dead-band can be individually enabled for each
compare unit by setting bits 5, 6, and 7 in the DBTCONA register for EVA and DBTCONB for
EVB.
The minimum achievable non-zero dead time is one CPU clock cycle (e.g. 50 ns), obtained by
choosing the x/1 prescale option, and setting the DB period to 1 (i.e. DBTCONx.11-8 = 0001,
where x is A for EVA and x is B for EVB).
7 - 24 C28x - Event Manager
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