Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD 数据表

845

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

Input filtering can efficiently remove spurious pulses that might be generated by the presence of particulate 

contamination on the optical or magnetic disk of the rotary sensor.
Spurious pulses can also occur in environments with high levels of electro-magnetic interference. Or, simply if 

vibration occurs even when rotation is fully stopped and the shaft of the motor is in such a position that the 

beginning of one of the reflective or magnetic bars on the rotary sensor disk is aligned with the light or magnetic 

(Hall) receiver cell of the rotary sensor. Any vibration can make the PHA, PHB signals toggle for a short duration.

1

1

1

MAXFILT

PHA

PHB

IDX

TIOA0

TIOB0

TIOB1

INVA

1

INVB

1

INVIDX

SWAP

1

IDXPHB

Filter

Filter

Filter

1

FILTER

Direction
and 
Edge
Detection

IDX

PHedge

DIR

Input Pre-Processing