LM3S3749 Datasheet, PDF (262/898 Pages) Texas Instruments – Stellaris® LM3S3749 Microcontroller

Hibernation Module
Register 5: Hibernation Control (HIBCTL), offset 0x010
This register is the control register for the Hibernation module.
Hibernation Control (HIBCTL)
Base 0x400F.C000
Offset 0x010
Type R/W, reset 0x8000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
WRC
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
1
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
reserved
VABORT CLK32EN LOWBATEN PINWEN RTCWEN CLKSEL HIBREQ RTCEN
Type RO
RO
RO
RO
RO
RO
RO
RO
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
30:8
7
Name
WRC
reserved
VABORT
Type
RO
RO
R/W
Reset
1
0x00
0
Description
Write Complete/Capable
This bit indicates whether the hibernation module can receive a write
operation.
Value Description
0 The interface is processing a prior write and is busy. Any write
operation that is attempted while WRC is 0 results in
undetermined behavior.
1 The interface is ready to accept a write.
Software must poll this bit between write requests and defer writes until
WRC=1 to ensure proper operation.
This difference may be exploited by software at reset time to detect
which method of programming is appropriate: 0 = software delay loops
required; 1 = WRC paced available.
The bit name WRC means "Write Complete," which is the normal use
of the bit (between write accesses). However, because the bit is set
out-of-reset, the name can also mean "Write Capable" which simply
indicates that the interface may be written to by software. This meaning
also has more meaning to the out-of-reset sense.
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.
Power Cut Abort Enable
Value
0
1
Description
Power cut occurs during a low-battery alert.
Power cut is aborted.
262
November 17, 2011
Texas Instruments-Production Data