LM3S317-IQN20-A0T Luminary Micro, Inc., LM3S317-IQN20-A0T Datasheet - Page 342
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LM3S317-IQN20-A0T
Manufacturer Part Number
LM3S317-IQN20-A0T
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S317-IQN20-A0T.pdf
(379 pages)
- Current page: 342 of 379
- Download datasheet (3Mb)
Pulse Width Modulator (PWM)
342
Reset
Reset
Type
Type
Bit/Field
31:12
11:10
PWMn Generator A Control (PWMnGENA)
9:8
7:6
5:4
3:2
1:0
RO
RO
31
15
0
0
Register 18: PWM0 Generator A Control (PWM0GENA), offset 0x060
counter, as well as the compare A and compare B pulses from the comparators. When the counter
is running in Count-Down mode, only four of these events occur; when running in Count-Up/Down
mode, all six occur. These events provide great flexibility in the positioning and duty cycle of the
PWM signal that is produced.
The PWM0GENA register controls generation of the PWM0A signal.
Each field can take on one of the values defined in Table 15-2, which defines the effect of the
event on the output signal.
If a zero or load event coincides with a compare A or compare B event, the zero or load action is
taken and the compare A or compare B action is ignored. If a compare A event coincides with a
compare B event, the compare A action is taken and the compare B action is ignored.
control the generation of the PWMNA signal based on the load and zero output pulses from the
RO
RO
30
14
0
0
reserved
ActCmpBD
ActCmpBU
ActCmpAD
ActCmpAU
reserved
ActLoad
ActZero
Name
RO
RO
29
13
0
0
RO
RO
28
12
0
0
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
27
11
ActCmpBD
0
0
R/W
RO
26
10
0
0
Reset
R/W
RO
25
ActCmpBU
0
9
0
0
0
0
0
0
0
0
Preliminary
R/W
RO
24
0
8
0
reserved
Description
Reserved bits return an indeterminate value, and should
never be changed.
The action to be taken when the counter matches
comparator B while counting down.
The action to be taken when the counter matches
comparator B while counting up. Occurs only when the
Mode bit in the PWMnCTL register (see page 334) is set
to 1.
The action to be taken when the counter matches
comparator A while counting down.
The action to be taken when the counter matches
comparator A while counting up.Occurs only when the
Mode bit in the PWMnCTL register is set to 1.
The action to be taken when the counter matches the load
value.
The action to be taken when the counter is zero.
R/W
RO
23
ActCmpAD
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
ActCmpAU
0
5
0
R/W
RO
20
0
4
0
R/W
RO
19
0
3
0
ActLoad
R/W
RO
18
0
2
0
R/W
RO
17
May 4, 2007
0
1
0
ActZero
R/W
RO
16
0
0
0
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