Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
976
Figure 39-17. Predefined Connection of the Quadrature Decoder with Timer Counters
39.6.16.2 Input Pre-processing
Input pre-processing consists of capabilities to take into account rotary sensor factors such as polarities and phase
definition followed by configurable digital filtering.
definition followed by configurable digital filtering.
Each input can be negated and swapping PHA, PHB is also configurable.
The MAXFILT field in the TC_BMR is used to configure a minimum duration for which the pulse is stated as valid.
When the filter is active, pulses with a duration lower than MAXFILT +1 * t
When the filter is active, pulses with a duration lower than MAXFILT +1 * t
peripheral clock
ns are not passed to down-
stream logic.
Timer/Counter
Channel 0
Channel 0
1
XC0
TIOA
TIOB
Timer/Counter
Channel 1
Channel 1
1
XC0
TIOB
QDEN
Timer/Counter
Channel 2
Channel 2
1
TIOB0
XC0
1
1
SPEEDEN
1
XC0
Quadrature
Decoder
(Filter + Edge
Detect + QD)
PHA
PHB
IDX
TIOA0
TIOB0
TIOB1
TIOB1
TIOA0
Index
Speed/Position
Rotation
Speed Time Base
Reset pulse
Direction
PHEdges
QDEN