LM3S9B81 Datasheet, PDF (460/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

General-Purpose Timers
Register 11: GPTM Timer A Match (GPTMTAMATCHR), offset 0x030
This register is loaded with a match value. Interrupts can be generated when the timer value is equal
to the value in this register in one-shot or periodic mode. In Edge-Count mode, this register along
with GPTMTAILR, determines how many edge events are counted. The total number of edge events
counted is equal to the value in GPTMTAILR minus this value.
GPTM Timer A Match (GPTMTAMATCHR)
Timer0 base: 0x4003.0000
Timer1 base: 0x4003.1000
Timer2 base: 0x4003.2000
Timer3 base: 0x4003.3000
Offset 0x030
Type R/W, reset 0xFFFF.FFFF
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
TAMRH
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
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TAMRL
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
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Bit/Field
31:16
15:0
Name
TAMRH
TAMRL
Type
R/W
R/W
Reset Description
0xFFFF
GPTM Timer A Match Register High
When the timer is configured for 32-bit mode via the GPTMCFG register,
this value is compared to the upper half of GPTMTAR to determine
match events.
In 16-bit mode, this field reads as 0 and does not have an effect on the
state of GPTMTBMATCHR.
0xFFFF
GPTM Timer A Match Register Low
When the timer is configured for 32-bit mode via the GPTMCFG register,
this value is compared to the lower half of GPTMTAR, to determine
match events.
When the timer is configured for 16-bit mode via the GPTMCFG register,
this value is compared to GPTMTAR to determine match events.
When configured for Edge-Count mode, this value along with
GPTMTAILR, determines how many edge events are counted. The total
number of edge events counted is equal to the value in GPTMTAILR
minus this value.
When configured for PWM mode, this value along with GPTMTAILR,
determines the duty cycle of the output PWM signal.
460
June 29, 2010
Texas Instruments-Advance Information