LM3S5G51 Datasheet, PDF (1063/1266 Pages) Texas Instruments – Stellaris® LM3S5G51 Microcontroller

Stellaris^® LM3S5G51 Microcontroller
Register 24: PWM0 Load (PWM0LOAD), offset 0x050
Register 25: PWM1 Load (PWM1LOAD), offset 0x090
Register 26: PWM2 Load (PWM2LOAD), offset 0x0D0
These registers contain the load value for the PWM counter (PWM0LOAD controls the PWM
generator 0 block, and so on). Based on the counter mode configured by the MODE bit in the
PWMnCTL register, this value is either loaded into the counter after it reaches zero or is the limit
of up-counting after which the counter decrements back to zero. When this value matches the
counter, a pulse is output which can be configured to drive the generation of the pwmA and/or pwmB
signal (via the PWMnGENA/PWMnGENB register) or drive an interruptor ADC trigger (via the
PWMnINTEN register).
If the Load Value Update mode is locally synchronized (based on the LOADUPD field encoding in
the PWMnCTL register), the 16-bit LOAD value is used the next time the counter reaches zero. If
the update mode is globally synchronized, it 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 1030). If this register is re-written before the actual update occurs, the previous value is
never used and is lost.
PWM0 Load (PWM0LOAD)
PWM0 base: 0x4002.8000
Offset 0x050
Type R/W, reset 0x0000.0000
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
LOAD
Type R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:16
15:0
Name
reserved
LOAD
Type
RO
R/W
Reset
0x0000
0x0000
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Counter Load Value
The counter load value.
January 23, 2012
Texas Instruments-Production Data
1063