TM4C1231D5PZ Datasheet, PDF (729/1161 Pages) Texas Instruments – Universal Asynchronous Receiver/Transmitter Run Mode Clock

Tiva^™ TM4C1231D5PZ Microcontroller _{(identical to LM4F112C4QC)}
Register 14: GPTM Timer A Prescale (GPTMTAPR), offset 0x038
This register allows software to extend the range of the timers when they are used individually.
When in one-shot or periodic down count modes, this register acts as a true prescaler for the timer
counter. When acting as a true prescaler, the prescaler counts down to 0 before the value in the
GPTMTAR and GPTMTAV registers are incremented. In all other individual/split modes, this register
is a linear extension of the upper range of the timer counter, holding bits 23:16 in the 16-bit modes
of the 16/32-bit GPTM and bits 47:32 in the 32-bit modes of the 32/64-bit Wide GPTM.
GPTM Timer A Prescale (GPTMTAPR)
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
32/64-bit Wide Timer 0 base: 0x4003.6000
32/64-bit Wide Timer 1 base: 0x4003.7000
32/64-bit Wide Timer 2 base: 0x4004.C000
32/64-bit Wide Timer 3 base: 0x4004.D000
32/64-bit Wide Timer 4 base: 0x4004.E000
32/64-bit Wide Timer 5 base: 0x4004.F000
Offset 0x038
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
TAPSRH
TAPSR
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:16
15:8
7:0
Name
reserved
TAPSRH
TAPSR
Type
RO
R/W
R/W
Reset
0
0x00
0x00
Description
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.
GPTM Timer A Prescale High Byte
The register loads this value on a write. A read returns the current value
of the register.
For the 16/32-bit GPTM, this field is reserved. For the 32/64-bit Wide
GPTM, this field contains the upper 8-bits of the 16-bit prescaler.
Refer to Table 11-5 on page 680 for more details and an example.
GPTM Timer A Prescale
The register loads this value on a write. A read returns the current value
of the register.
For the 16/32-bit GPTM, this field contains the entire 8-bit prescaler.
For the 32/64-bit Wide GPTM, this field contains the lower 8-bits of the
16-bit prescaler.
Refer to Table 11-5 on page 680 for more details and an example.
July 16, 2013
729
Texas Instruments-Production Data