LM3S1968 Datasheet, PDF (607/709 Pages) List of Unclassifed Manufacturers – Microcontroller

Stellaris^® LM3S1968 Microcontroller
Note that the QEI module clock must be enabled before the registers can be programmed (see
page 219). There must be a delay of 3 system clocks after the QEI module clock is enabled before
any QEI module registers are accessed.
Table 17-3. QEI Register Map
Offset Name
Type
0x000 QEICTL
0x004 QEISTAT
0x008 QEIPOS
0x00C QEIMAXPOS
0x010 QEILOAD
0x014 QEITIME
0x018 QEICOUNT
0x01C QEISPEED
0x020 QEIINTEN
0x024 QEIRIS
0x028 QEIISC
R/W
RO
R/W
R/W
R/W
RO
RO
RO
R/W
RO
R/W1C
Reset
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
Description
QEI Control
QEI Status
QEI Position
QEI Maximum Position
QEI Timer Load
QEI Timer
QEI Velocity Counter
QEI Velocity
QEI Interrupt Enable
QEI Raw Interrupt Status
QEI Interrupt Status and Clear
See
page
608
610
611
612
613
614
615
616
617
618
619
17.6
Register Descriptions
The remainder of this section lists and describes the QEI registers, in numerical order by address
offset.
July 15, 2014
607
Texas Instruments-Production Data