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Mini57
Apr. 06, 2017
Page 244 of 475
Rev.1.00
MINI5
7
S
E
RI
E
S
TECH
NIC
A
L R
E
F
E
RE
N
CE
MA
N
UA
L
cycle
comparison
units.
The
MSKENn
register
contains
six
bits,
MSKEN[5:0]
(EPWM_PHCHG[13:8] / EPWM_PHCHGNXT[13:8]) determine which PWM I/O pins will be
overridden. On reset MSKENn is 00H. The MSKDATn register contains six bits, MSKDAT[5:0]
(EPWM_PHCHG[5:0] / EPWM_PHCHGNXT[5:0]) determine the state of the PWM I/O pins when
a particular output is masked via the MSKDATn bits. On reset MSKDATn is 00H. When the
MSKEN[5:0] bits are set, the corresponding MSKDAT[5:0] bit will have effect on the PWM
channel.
3-phase
load
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
Symbol of a typical 3-phase inverter
n : 0~5
0 2 4
1 3 5
MSKENn
0 2 4
1 3 5
MSKDATn
3-phase
load
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
Symbol of a typical 3-phase inverter
0 2 4
1 3 5
PWMnME
0 2 4
1 3 5
PWMnMD
n : 0~5
Figure 6.8-23 EPWM 3-phase Motor Mask Diagram
For example 1, Motor activating path is path 0 connects path 3, and path 0 is used as EPWM0
and path 3 is ON (short).
PWM channel 0 follow PWM generator.
PWM channels 1-5 are masked by MSKENn bits,.
PWM channels 1-5 outputs are determined by state of MSKDATn bits.
Switch 0 (On/Off)
Control By EPWM0 (EPWM0 Frequency/Duty Generator).
Switch 1 (Off)
MSKDAT1 = 0
Switch 2 (Off)
MSKDAT2 = 0
Switch 3 (On)
MSKDAT3 = 1
Switch 4 (Off)
MSKDAT4 = 0
Switch 5 (Off)
MSKDAT5 = 0
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