LM3S5P3B Datasheet, PDF (1017/1170 Pages) Texas Instruments – Stellaris® LM3S5P3B Microcontroller

Stellaris^® LM3S5P3B Microcontroller
Register 2: QEI Status (QEISTAT), offset 0x004
This register provides status about the operation of the QEI module.
QEI Status (QEISTAT)
QEI0 base: 0x4002.C000
QEI1 base: 0x4002.D000
Offset 0x004
Type RO, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
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
DIRECTION ERROR
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:2
1
Name
reserved
DIRECTION
Type
Reset Description
RO 0x0000.000 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.
RO
0
Direction of Rotation
Indicates the direction the encoder is rotating.
Value Description
0 The encoder is rotating forward.
1 The encoder is rotating in reverse.
0
ERROR
RO
0
Error Detected
Value Description
0 No error.
1 An error was detected in the gray code sequence (that is, both
signals changing at the same time).
January 20, 2012
Texas Instruments-Production Data
1017