Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X Datenbogen
Produktcode
DK-TM4C129X
Register 18: GPTM Timer A (GPTMTAR), offset 0x048
This register shows the current value of the Timer A counter in all cases except for Input Edge Count
and Time modes. In the Input Edge Count mode, this register contains the number of edges that
have occurred. In the Input Edge Time mode, this register contains the time at which the last edge
event took place.
and Time modes. In the Input Edge Count mode, this register contains the number of edges that
have occurred. In the Input Edge Time mode, this register contains the time at which the last edge
event took place.
Note:
When an alternate clock source is enabled, a read of this register returns the current count
-1.
-1.
When a GPTM is configured to one of the 32-bit modes, GPTMTAR appears as a 32-bit register
(the upper 16-bits correspond to the contents of the GPTM Timer B (GPTMTBR) register). In
the16-bit Input Edge Count, Input Edge Time, and PWM modes, bits 15:0 contain the value of the
counter and bits 23:16 contain the value of the prescaler, which is the upper 8 bits of the count. Bits
31:24 always read as 0. To read the value of the prescaler in 16-bit One-Shot and Periodic modes,
read bits [23:16] in the GPTMTAV register. To read the value of the prescalar in periodic snapshot
mode, read the Timer A Prescale Snapshot (GPTMTAPS) register.
(the upper 16-bits correspond to the contents of the GPTM Timer B (GPTMTBR) register). In
the16-bit Input Edge Count, Input Edge Time, and PWM modes, bits 15:0 contain the value of the
counter and bits 23:16 contain the value of the prescaler, which is the upper 8 bits of the count. Bits
31:24 always read as 0. To read the value of the prescaler in 16-bit One-Shot and Periodic modes,
read bits [23:16] in the GPTMTAV register. To read the value of the prescalar in periodic snapshot
mode, read the Timer A Prescale Snapshot (GPTMTAPS) register.
GPTM Timer A (GPTMTAR)
16/32-bit Timer 0 base: 0x4003.0000
16/32-bit Timer 1 base: 0x4003.1000
16/32-bit Timer 2 base: 0x4003.2000
16/32-bit Timer 3 base: 0x4003.3000
16/32-bit Timer 4 base: 0x4003.4000
16/32-bit Timer 5 base: 0x4003.5000
16/32-bit Timer 6 base: 0x400E.0000
16/32-bit Timer 7 base: 0x400E.1000
Offset 0x048
Type RO, reset 0xFFFF.FFFF
16/32-bit Timer 1 base: 0x4003.1000
16/32-bit Timer 2 base: 0x4003.2000
16/32-bit Timer 3 base: 0x4003.3000
16/32-bit Timer 4 base: 0x4003.4000
16/32-bit Timer 5 base: 0x4003.5000
16/32-bit Timer 6 base: 0x400E.0000
16/32-bit Timer 7 base: 0x400E.1000
Offset 0x048
Type RO, reset 0xFFFF.FFFF
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TAR
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Type
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
TAR
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Type
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reset
Description
Reset
Type
Name
Bit/Field
GPTM Timer A Register
A read returns the current value of the GPTM Timer A Count Register,
in all cases except for Input Edge Count and Time modes. In the Input
Edge Count mode, this register contains the number of edges that have
occurred. In the Input Edge Time mode, this register contains the time
at which the last edge event took place.
in all cases except for Input Edge Count and Time modes. In the Input
Edge Count mode, this register contains the number of edges that have
occurred. In the Input Edge Time mode, this register contains the time
at which the last edge event took place.
0xFFFF.FFFF
RO
TAR
31:0
1159
December 13, 2013
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TM4C129XNCZAD Microcontroller