LM3S3749 Luminary Micro, Inc, LM3S3749 Datasheet - Page 158

• Manufacturer Part Number: LM3S3749
• Description: Lm3s3749 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
Hibernation Module
Hibernation RTC Trim (HIBRTCT)
Base 0x400F.C000
Offset 0x024
Type R/W, reset 0x0000.7FFF
158
Bit/Field
31:16
15:0
R/W
RO
31
15
0
0
R/W
RO
Register 10: Hibernation RTC Trim (HIBRTCT), offset 0x024
This register contains the value that is used to trim the RTC clock predivider. It represents the
computed underflow value that is used during the trim cycle. It is represented as 0x7FFF ± N clock
cycles.
Note:
30
14
0
1
R/W
RO
29
13
reserved
0
1
Name
TRIM
HIBRTCC, HIBRTCM0, HIBRTCM1, HIBRTCLD, HIBRTCT, and HIBDATA are on the
Hibernation module clock domain and require a delay of t
accesses. See “Register Access Timing” on page 138.
R/W
RO
28
12
0
1
R/W
RO
27
11
0
1
Type
R/W
RO
R/W
RO
26
10
0
1
0x7FFF
0x0000
R/W
RO
Reset
25
0
9
1
Preliminary
R/W
RO
24
0
8
1
reserved
TRIM
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.
RTC Trim Value
This value is loaded into the RTC predivider every 64 seconds. It is used
to adjust the RTC rate to account for drift and inaccuracy in the clock
source. The compensation is made by software by adjusting the default
value of 0x7FFF up or down.
R/W
RO
23
0
7
1
R/W
RO
22
0
6
1
R/W
RO
21
0
5
1
R/W
RO
20
0
4
1
HIB_REG_WRITE
R/W
RO
19
0
3
1
R/W
RO
18
0
2
1
between write
R/W
RO
17
0
1
1
June 02, 2008
R/W
RO
16
0
0
1