LM3S610 Data Sheet
October 8, 2006 159
Preliminary
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.
Bit/Field Name Type Reset Description
31:4 reserved RO 0 Reserved bits return an indeterminate value, and should never
be changed.
3 TBAMS R/W 0 GPTM TimerB Alternate Mode Select
0: Capture mode is enabled.
1: PWM mode is enabled.
Note: To enable PWM mode, you must also clear the TBCMR
bit and set the TBMR field to 0x2.
2 TBCMR R/W 0 GPTM TimerB Capt ure Mode
0: Edge-Coun t mode.
1: Edge-Time mode.
1:0 TBMR R/W 0 GPTM TimerB Mode
0x0: Reserved.
0x1: One-Shot Timer mode.
0x2: Periodic Timer mode.
0x3: Capture mode.
The timer mode is based on the timer configuration defined by
bits 2:0 in the GPTMCFG register.
In 16-bit timer configuration, these bits control the 16-bit timer
modes for TimerB.
In 32-bit timer configuration, this register’s contents are ignored
and GPTMTAMR is used.
reserved
RO
0
GPTM TimerB Mode (GPTMTBMR)
Offset 0x008
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reset
Type
000000000000000
RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
RO
0
Reset
Type
000000000000000
RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W
reserved
TBMR
TBAMS TBCMR