LM3S3749 Luminary Micro, Inc, LM3S3749 Datasheet - Page 85
LM3S3749
Manufacturer Part Number
LM3S3749
Description
Lm3s3749 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S3749.pdf
(753 pages)
Available stocks
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Quantity
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Part Number:
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Texas Instruments
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Reset
Reset
Type
Type
Run-Mode Clock Configuration (RCC)
Base 0x400F.E000
Offset 0x060
Type R/W, reset 0x078E.3AD1
June 02, 2008
Bit/Field
31:28
27
RO
RO
31
15
0
0
reserved
RO
RO
Register 8: Run-Mode Clock Configuration (RCC), offset 0x060
This register is defined to provide source control and frequency speed.
30
14
0
0
reserved
PWRDN
R/W
RO
29
13
reserved
0
1
Name
ACG
reserved
RO
RO
28
12
0
1
BYPASS
ACG
R/W
R/W
27
11
0
1
Type
R/W
RO
R/W
R/W
26
10
1
0
R/W
R/W
Reset
25
1
9
1
0x0
SYSDIV
0
Preliminary
XTAL
R/W
R/W
24
1
8
0
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.
Auto Clock Gating
This bit specifies whether the system uses the Sleep-Mode Clock
Gating Control (SCGCn) registers and Deep-Sleep-Mode Clock
Gating Control (DCGCn) registers if the controller enters a Sleep or
Deep-Sleep mode (respectively). If set, the SCGCn or DCGCn registers
are used to control the clocks distributed to the peripherals when the
controller is in a sleep mode. Otherwise, the Run-Mode Clock Gating
Control (RCGCn) registers are used when the controller enters a sleep
mode.
The RCGCn registers are always used to control the clocks in Run
mode.
This allows peripherals to consume less power when the controller is
in a sleep mode and the peripheral is unused.
R/W
R/W
23
1
7
1
USESYSDIV
R/W
R/W
22
0
6
1
reserved
R/W
RO
21
0
5
0
OSCSRC
USEPWMDIV
R/W
R/W
20
0
4
1
R/W
RO
19
1
3
0
LM3S3749 Microcontroller
reserved
PWMDIV
R/W
RO
18
1
2
0
IOSCDIS
R/W
R/W
17
1
1
0
MOSCDIS
reserved
R/W
RO
16
0
0
1
85
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