Specifications

PWM Circuits Associated With Compare Units
6-48
6.5.2 Programmable Dead-Band (Dead-Time) Unit
EVA and EVB have their own programmable dead-band units (DBTCONA and
DBTCONB, respectively)The programmable dead-band unit features:
- One 16-bit dead-band control register, DBTCONx (RW)
- One input clock prescaler: x/1, x/2, x/4, etc., to x/32
- Device (CPU) clock input
- Three 4-bit down counting timers
- Control logic
Dead-Band Timer Control Registers A and B (DBTCONA and DBTCONB)
The operation of the dead-band unit is controlled by the dead-band timer con-
trol registers (DBTCONA and DBTCONB). The bit description of DBTCONA
is given in Figure 6–18 and that of DBTCONB is given in Figure 6–19.
Figure 6–18. Dead-Band Timer Control Register A (DBTCONA) — Address xx15h
15–12 11 10 9 8
Reserved DBT3 DBT2 DBT1 DBT0
R-0 RW-0 RW-0 RW-0 RW-0
765432 1–0
EDBT3
EDBT2 EDBT1 DBTPS2 DBTPS1 DBTPS0 Reserved
RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 R-0
Note: R = Read access, W = Write access, -0 = value after reset
Bits 15–12 Reserved. Reads return zero; writes have no effect.
Bits 11–8 DBT3 (MSB)–DBT0 (LSB). Dead-band timer period. These bits define the pe-
riod value of the three 4-bit dead-band timers.
Bit 7 EDBT3. Dead-band timer 3 enable (for pins PWM5 and PWM6 of Compare
Unit 3).
0 Disable
1 Enable
Bit 6 EDBT2. Dead-band timer 2 enable (for pins PWM3 and PWM4 of Compare
Unit 2).
0 Disable
1 Enable