6 Feb
2022
6 Feb
'22
9:43 a.m.
Yes, I am putting 1 into the CSR to start the conversion and I do get a
200(8) indicating that the conversion is complete.? I wonder if this
means the A/D chip is OK but something else, like the multiplexer chip
or gain amp is fried.
On 2/6/2022 12:33 PM, Jerry Weiss via cctalk wrote:
Are you triggering an A/D conversion via the CSR or
external signal??
Then check the A/D done bit.
See? EK-AXV11-UG-02 Chapter 4.
?? Jerry
On 2/6/22 11:20 AM, Douglas Taylor via cctalk wrote:
> I have one of these and would like to use it, however it appears to
> only partially work.? Here is what I have found that works and what
> doesn't:
>
> 1. CSR and DBR are present and operational.
>
> 2. Jumpers set to 'factory'.
>
> 3. D/A portion works, can deposit codes in ODT and see voltages out
> on DAC pins that change depending on the octal value deposited in
> CSR+4 or +6.
>
> 4. A/D portion returns full scale code, either 3777 (2's compliment)
> or 7777 (offset binary) whether in the input is open or shorted to gnd.
>
> I think the problem is that the A/D inputs are not exactly protected
> and damage has occurred to this portion in the past.
>
> Does anyone have any info on the A/D module?? Who made it?? Can you
> open it up?? Does XXDP have a test for this?
>
> Doug
>