LM3S2965-IRN50-A1T ETC2 [List of Unclassifed Manufacturers], LM3S2965-IRN50-A1T Datasheet - Page 505

• Manufacturer Part Number: LM3S2965-IRN50-A1T
• Description: Microcontroller
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

QEI Control (QEICTL)
QEI0 base: 0x4002.C000
QEI1 base: 0x4002.D000
Offset 0x000
Type R/W, reset 0x0000.0000
November 30, 2007
Reset
Reset
Type
Type
Bit/Field
31:13
8:6
12
11
10
9
RO
RO
31
15
0
0
Register 1: QEI Control (QEICTL), offset 0x000
This register contains the configuration of the QEI module. Separate enables are provided for the
quadrature encoder and the velocity capture blocks; the quadrature encoder must be enabled in
order to capture the velocity, but the velocity does not need to be captured in applications that do
not need it. The phase signal interpretation, phase swap, Position Update mode, Position Reset
mode, and velocity predivider are all set via this register.
reserved
RO
RO
30
14
0
0
STALLEN
reserved
VelDiv
Name
INVB
INVA
INVI
RO
RO
29
13
0
0
STALLEN
R/W
RO
28
12
0
0
INVI
R/W
RO
Type
27
11
R/W
R/W
R/W
R/W
R/W
0
0
RO
INVB
R/W
RO
26
10
0
0
Reset
0x00
0x0
0
0
0
0
INVA
R/W
RO
25
0
9
0
Preliminary
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.
Stall QEI
When set, the QEI stalls when the microcontroller asserts Halt.
Invert Index Pulse
When set , the input Index Pulse is inverted.
Invert PhB
When set, the PhB input is inverted.
Invert PhA
When set, the PhA input is inverted.
Predivide Velocity
A predivider of the input quadrature pulses before being applied to the
QEICOUNT accumulator. This field can be set to the following values:
R/W
RO
Value
24
0
8
0
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
reserved
Predivider
VelDiv
R/W
RO
23
0
7
0
÷128
÷16
÷32
÷64
÷1
÷2
÷4
÷8
R/W
RO
22
0
6
0
VelEn
R/W
RO
21
0
5
0
ResMode
R/W
RO
20
0
4
0
CapMode
LM3S2965 Microcontroller
R/W
RO
19
0
3
0
SigMode
R/W
RO
18
0
2
0
Swap
R/W
RO
17
0
1
0
Enable
R/W
RO
16
0
0
0
505