LM4F111B2QR Datasheet, PDF (661/1113 Pages) Texas Instruments – Microcontroller

Stellaris^® LM4F111B2QR Microcontroller
Bit/Field
6
5
4
3
2
Name
TAWOT
TAMIE
TACDIR
TAAMS
TACMR
Type
R/W
R/W
R/W
R/W
R/W
Reset
0
0
Description
GPTM Timer A Wait-on-Trigger
Value Description
0 Timer A begins counting as soon as it is enabled.
1 If Timer A is enabled (TAEN is set in the GPTMCTL register),
Timer A does not begin counting until it receives a trigger from
the timer in the previous position in the daisy chain, see Figure
10-9 on page 649. This function is valid for one-shot, periodic,
and PWM modes.
This bit must be clear for GP Timer Module 0, Timer A.
GPTM Timer A Match Interrupt Enable
Value Description
0 The match interrupt is disabled.
1 An interrupt is generated when the match value in the
GPTMTAMATCHR register is reached in the one-shot and
periodic modes.
0
GPTM Timer A Count Direction
Value Description
0 The timer counts down.
1 The timer counts up. When counting up, the timer starts from a
value of 0x0.
When in PWM or RTC mode, the status of this bit is ignored. PWM mode
always counts down and RTC mode always counts up.
0
GPTM Timer A Alternate Mode Select
The TAAMS values are defined as follows:
Value Description
0 Capture mode is enabled.
1 PWM mode is enabled.
Note: To enable PWM mode, you must also clear the TACMR
bit and configure the TAMR field to 0x1 or 0x2.
0
GPTM Timer A Capture Mode
The TACMR values are defined as follows:
Value Description
0 Edge-Count mode
1 Edge-Time mode
April 25, 2012
661
Texas Instruments-Advance Information