LM3S818 Luminary Micro, Inc, LM3S818 Datasheet - Page 337
LM3S818
Manufacturer Part Number
LM3S818
Description
Lm3s818 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S818.pdf
(392 pages)
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February 6, 2007
Reset
Reset
Type
Type
Bit/Field
31:16
15:0
PWMn Compare B (PWMnCMPB)
R/W
RO
31
15
0
0
Register 31: PWM0 Compare B (PWM0CMPB), offset 0x05C
Register 32: PWM1 Compare B (PWM1CMPB), offset 0x09C
Register 33: PWM2 Compare B (PWM2CMPB), offset 0x0DC
These registers contain a value to be compared against the counter (PWM0CMPB controls the
PWM generator 0 block, and so on). 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 319). 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
LM3S818 Data Sheet
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
337
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