MC9S12E128CFUE Datasheet, PDF (352/606 Pages) Freescale Semiconductor, Inc – MC9S12E128 Data Sheet

Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
11.3.2.29 PMF Deadtime B Register (PMFDTMB)
Module Base + 0x002E
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R0
0
0
0
W
PMFDTMB
Reset 0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
= Unimplemented or Reserved
Figure 11-35. PMF Deadtime B Register (PMFDTMB)
Read anytime and write only if MTG is set. This register cannot be modified after the WP bit is set.
Table 11-38. PMFDTMB Field Descriptions
Field
Description
11–0
PMFDTMB
PMF Deadtime B — The 12-bit value written to this register is the number of PWM clock cycles in
complementary channel operation. A reset sets the PWM deadtime register to a default value of 0x0FFF,
selecting a deadtime of 256-PWM clock cycles minus one bus clock cycle.
Note: Deadtime is affected by changes to the prescaler value. The deadtime duration is determined as follows:
DT = P × PMFDTMB – 1, where DT is deadtime, P is the prescaler value, PMFDTMB is the programmed
value of dead time. For example: if the prescaler is programmed for a divide-by-two and the PMFDTMB is
set to five, then P = 2 and the deadtime value is equal to DT = 2 × 5 – 1 = 9 IPbus clock cycles. A special
case exists when the P = 1, then DT = PMFDTMB.
MC9S12E128 Data Sheet, Rev. 1.07
352
Freescale Semiconductor