LM3S8970 Luminary Micro, Inc, LM3S8970 Datasheet - Page 218

• Manufacturer Part Number: LM3S8970
• Description: Lm3s8970 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
General-Purpose Timers
GPTM TimerB Mode (GPTMTBMR)
Timer0 base: 0x4003.0000
Timer1 base: 0x4003.1000
Timer2 base: 0x4003.2000
Timer3 base: 0x4003.3000
Offset 0x008
Type R/W, reset 0x0000.0000
218
Bit/Field
31:4
3
2
RO
RO
31
15
0
0
Register 3: GPTM TimerB Mode (GPTMTBMR), offset 0x008
This register configures the GPTM based on the configuration selected in the GPTMCFG register.
When in 16-bit PWM mode, set the TBAMS bit to 0x1, the TBCMR bit to 0x0, and the TBMR field to
0x2.
RO
RO
30
14
0
0
reserved
RO
RO
TBAMS
TBCMR
29
13
0
0
Name
RO
RO
28
12
0
0
RO
RO
27
11
0
0
Type
R/W
R/W
RO
RO
RO
26
10
0
0
reserved
Reset
0x00
RO
RO
25
0
9
0
0
0
Preliminary
RO
RO
24
0
8
0
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.
GPTM TimerB Alternate Mode Select
The TBAMS values are defined as follows:
GPTM TimerB Capture Mode
The TBCMR values are defined as follows:
Value
Value
reserved
0
1
0
1
RO
RO
23
Description
Capture mode is enabled.
PWM mode is enabled.
Note:
Description
Edge-Count mode
Edge-Time mode
0
7
0
RO
RO
22
0
6
0
To enable PWM mode, you must also clear the TBCMR
bit and set the TBMR field to 0x2.
RO
RO
21
0
5
0
RO
RO
20
0
4
0
TBAMS
R/W
RO
19
0
3
0
TBCMR
R/W
RO
18
0
2
0
July 25, 2008
R/W
RO
17
0
1
0
TBMR
R/W
RO
16
0
0
0