Regarding Arty A7 100T CK_RST or external reset possibilities

[gvzz]

Hi,

It is well known that Digilent does not provide schematics of FT232HQ connection to CK_RST.

The Arty A7 Manual:

https://digilent.com/reference/programmable-logic/arty-a7/reference-manual

just says:
 

Quote

 

The CK_RST signal (see the Arty A7 Schematic) is also connected to the FT2232HQ device via JP2. When JP2 is shorted, the FT2232HQ can trigger a Microblaze reset, mimicking the behavior of Arduino and chipKIT boards when sketches are loaded. Note the CK_RST signal is also connected to the red RESET button and the RST pin of J7 on the shield connector (these connections are not shown in the figure below).

The connections between the FT2232HQ and the Artix-7 are shown in Figure 8.1.

 

Figure 8.1 shows the BDBUS4 connected to the C2 pin of the FPGA, CK_RST net connected to it.

Questions:

Is the CK_RST active high or active low ?

What is the time duration, in seconds, of this reset ?

Thanks in advance.

Regards,

gvzz

 

 

 

[asmi]

I'm pretty sure it's an active-low, but you can measure it with a multimeter just to be sure. As for duration, it's an asyncronous reset, so it can be of any length.