LM3S315 Luminary Micro, Inc., LM3S315 Datasheet - Page 344
LM3S315
Manufacturer Part Number
LM3S315
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S315.pdf
(382 pages)
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Pulse Width Modulator (PWM)
344
Reset
Reset
Type
Type
Bit/Field
31:16
15:0
PWMn Compare B (PWMnCMPB)
R/W
RO
31
15
0
0
Register 17: PWM0 Compare B (PWM0CMPB), offset 0x05C
This register contains a value to be compared against the counter. When this value matches the
counter, a pulse is output; this can drive the generation of a PWM signal (via the PWMnGENA/
PWMnGENB registers) or drive an interrupt or ADC trigger (via the PWMnINTEN register). If the
value of this register is greater than the PWMnLOAD register, then no pulse is ever output.
For comparator B, if the update mode is immediate (based on the CmpBUpd bit in the PWMnCTL
register), then this 16-bit CompB value is used the next time the counter reaches zero after a
synchronous update has been requested through the PWM Master Control (PWMCTL) register
(see page 327). If this register is rewritten before the actual update occurs, the previous value is
never used and is lost.
R/W
RO
30
14
0
0
reserved
CompB
Name
R/W
RO
29
13
0
0
R/W
RO
28
12
0
0
Type
R/W
R/W
RO
RO
27
11
0
0
R/W
RO
26
10
0
0
Reset
R/W
RO
25
0
9
0
0
0
Preliminary
R/W
RO
24
0
8
0
reserved
CompB
Description
Reserved bits return an indeterminate value, and should
never be changed.
The value to be compared against the counter.
R/W
RO
23
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
0
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
April 27, 2007
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
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