LM3S3739 Luminary Micro, Inc, LM3S3739 Datasheet - Page 86

• Manufacturer Part Number: LM3S3739
• Description: Lm3s3739 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
System Control
GPIO High Speed Control (GPIOHSCTL)
Base 0x400F.E000
Offset 0x06C
Type R/W, reset 0x0000.0000
86
Bit/Field
31:8
RO
RO
7
6
5
4
3
2
1
31
15
0
0
RO
RO
Register 10: GPIO High Speed Control (GPIOHSCTL), offset 0x06C
This register provides the user the ability to change the GPIO ports to run on a single-cycle bus
equivalent to the processor clock instead of the legacy bus with two-cycle access. The address
aperture in the memory map will change for the ports that are enabled for high-speed access (see
Table 10-3 on page 248).
30
14
0
0
PORTHHS
PORTGHS
PORTEHS
PORTDHS
PORTCHS
PORTBHS
PORTFHS
RO
RO
29
13
reserved
0
0
Name
RO
RO
28
12
0
0
reserved
RO
RO
27
11
0
0
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
RO
26
10
0
0
RO
RO
Reset
25
0
9
0
0x0
0
0
0
0
0
0
0
Preliminary
RO
RO
24
0
8
0
reserved
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.
Port H High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port G High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port F High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port E High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port D High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port C High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
Port B High-Speed
When set, the memory aperture for Port H is selected to be high speed
(single-cycle). Otherwise, the legacy aperture (two-cycle) is chosen.
PORTHHS
R/W
RO
23
0
7
0
PORTGHS
R/W
RO
22
0
6
0
PORTFHS
R/W
RO
21
0
5
0
PORTEHS
R/W
RO
20
0
4
0
PORTDHS
R/W
RO
19
0
3
0
PORTCHS
R/W
RO
18
0
2
0
PORTBHS
R/W
RO
17
0
1
0
June 02, 2008
PORTAHS
R/W
RO
16
0
0
0