Delta ASD-A2-0121 Series User Manual page 201

Chapter 6 Control Mode of Operation
Settings：
Pulse Type

0: AB phase pulse (4x)
1: Clockwise (CW) and Counterclockwise (CCW) pulse
2: Pulse + symbol
Filter Width

If the received frequency is much higher than the setting, it will be regarded as
the noise and filtered out.
Setting
Note:
1) When the source of external pulse is from the high-speed differential signal and the setting
value is 0 (the high-speed filter frequency is 3.33 Mpps at the moment), then:
Pulse Input
filtered signal
When this pulse width is shorter than
150 ns, it will be regarded as low level.
Two input pulses will be regarded as one.
the user uses
If
Note: When the signal is the high-speed pulse specification of 4 Mpps and the settings value
of the filter is 4, then the pulse will not be filtered.
6-4
Other settings: reserved
Min. pulse width
Value
(Low-speed filter frequency)
0 600 ns (0.83 Mpps)
1 2.4 us (208 Kpps)
2 4.8 us (104 Kpps)
3 9.6 us (52 Kpps)
4 No filter function
<150ns
150ns
When High, Low duty of the pulse width are longer than 150 ns,
it can ensure the pulse command will not be filtered.
2 ~ 4 MHz input pulse, it is suggested to set the filter value to 4.
*note1 Setting
Value
0
1
2
3
4
Pulse Input
filtered signal
When this pulse width is shorter than
150 ns, it will be regarded as high level.
Two input pulses will be regarded as one.
>150 ns
>150 ns
Min. pulse width
*note1
(High-speed filter frequency)
150 ns (3.33 Mpps)
600 ns (0.83 Mpps)
1.2 us (416 Kpps)
2.4 us (208 Kpps)
No filter function
<150ns
150ns
ASDA-A2