LM3S5K36 Datasheet, PDF (471/1050 Pages) Texas Instruments – Stellaris® LM3S5K36 Microcontroller

Stellaris^® LM3S5K36 Microcontroller
Register 2: GPTM Timer A Mode (GPTMTAMR), offset 0x004
This register configures the GPTM based on the configuration selected in the GPTMCFG register.
When in PWM mode, set the TAAMS bit, clear the TACMR bit, and configure the TAMR field to 0x1 or
0x2.
This register controls the modes for Timer A when it is used individually. When Timer A and Timer
B are concatenated, this register controls the modes for both Timer A and Timer B, and the contents
of GPTMTBMR are ignored.
Important: Bits in this register should only be changed when the TAEN bit in the GPTMCTL register
is cleared.
GPTM Timer A Mode (GPTMTAMR)
Timer 0 base: 0x4003.0000
Timer 1 base: 0x4003.1000
Timer 2 base: 0x4003.2000
Offset 0x004
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
reserved
TASNAPS TAWOT TAMIE TACDIR TAAMS TACMR
TAMR
Type RO
RO
RO
RO
RO
RO
RO
RO
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
31:8
7
Name
reserved
TASNAPS
Type
RO
R/W
Reset Description
0x0000.00 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.
0
GPTM Timer A Snap-Shot Mode
Value Description
0 Snap-shot mode is disabled.
1 If Timer A is configured in the periodic mode, the actual
free-running value of Timer A is loaded at the time-out event
into the GPTM Timer A (GPTMTAR) register. If the timer
prescaler is used, the prescaler snapshot is loaded into the
GPTM Timer A (GPTMTAPR).
6
TAWOT
R/W
0
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
10-2 on page 460. This function is valid for both one-shot and
periodic modes.
This bit must be clear for GP Timer Module 0, Timer A.
January 21, 2012
471
Texas Instruments-Production Data