LM3S611 Datasheet, PDF (366/409 Pages) List of Unclassifed Manufacturers – Microcontroller

Pulse Width Modulator (PWM)
Register 19: PWM0 Interrupt Status and Clear (PWM0ISC), offset 0x04C
Register 20: PWM1 Interrupt Status and Clear (PWM1ISC), offset 0x08C
Register 21: PWM2 Interrupt Status and Clear (PWM2ISC), offset 0x0CC
These registers provide the current set of interrupt sources that are asserted to the controller
(PWM0ISC controls the PWM generator 0 block, and so on). Bits set to 1 indicate the latched
events that have occurred; a 0 bit indicates that the event in question has not occurred. These are
R/W1C registers; writing a 1 to a bit position clears the corresponding interrupt reason.
PWMn Interrupt Status (PWMnISC)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W1C
R/W1C
R/W1C
R/W1C
R/W1C
R/W1C
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:6
Name
reserved
Type
RO
5
IntCmpBD
R/W1C
4
IntCmpBU
R/W1C
3
IntCmpAD
R/W1C
2
IntCmpAU
R/W1C
1
IntCntLoad
R/W1C
0
IntCntZero
R/W1C
Reset
0
0
0
0
0
0
0
Description
Reserved bits return an indeterminate value, and should
never be changed.
Indicates that the counter has matched the comparator B
value while counting down.
Indicates that the counter has matched the comparator B
value while counting up.
Indicates that the counter has matched the comparator A
value while counting down.
Indicates that the counter has matched the comparator A
value while counting up.
Indicates that the counter has matched the PWMnLOAD
register.
Indicates that the counter has matched 0.
366
April 27, 2007
Preliminary