Gecko timing

[chester88]

I'm looking for the timing specs for the gecko 320. The manual does not specify the timing of direction hold time or direction setup time.
Here is the list on the EMC wiki of gecko products.
goes step hold, step space, direction hold, direction setup time .
If I get solid answers I will add them to the wiki and stepconf program.

Gecko 201 500 4000 20000 1000
Gecko 202 500 4500 20000 1000
Gecko 203v 2000 1000 200 200
Gecko 210 500 4000 20000 1000
Gecko 212 500 4000 20000 1000
Gecko 320 500 3500 ? ?

Thanks

[Mariss Freimanis]

The DIR setup and hold times are less than 200nS. The STP and DIR signal paths are symmetrical; they pass through identical optoisolator channel circuits. The STP signal winds up on the CLK input of an Up/Down counter while the DIR signal winds up on the counter's U/D input. The active edge is the rising STP edge so change DIR on the falling edge.

That takes care of setup and hold. STP pulse min logic '0' and '1' times are constrained by the opto characteristics, primarily the opto storage delay time. Min logic '0' time is 500nS, min logic '1' time is 3.5uS.

The input DC levels are <0.5V and >4.5V. Rise and fall times should be 100nS or less. The opto LEDs are connected common anode to +5VDC so the preferred STP polarity is logic '1' when there is no activity on the STP input (narrow logic '0' pulses).

Hope that helps.

Mariss

[chester88]

Thank you I will add the timing spec to the EMC wiki.