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Topic: AS1130 First attempt - working (Read 21 times) previous topic - next topic

Hexadec

According to the datasheet IRQ should be pulled high but the sync is left floating.

I have emailed AMS about the IRQ line as all the chips I have stay at logic low even with a pull-up resistor. Whatever I try I can't get the IRQ to respond.

I haven't had a reply yet though....
Sponge.
I'm allowed to have it 'cos it's not sharp.

funkyguy4000

Aw crap, I pulled SYNC to ground on the boards.  I guess I can just cut the trace.
Accelerate to 88 miles per hour.

Hexadec

Quote
I guess I can just cut the trace.


Unless you're using multiple chips I wouldn't bother...I pulled it low and high on different prototypes and it made no difference.

I haven't tried cascading them yet though.

Keep me informed of how you get on.  ;)
Sponge.
I'm allowed to have it 'cos it's not sharp.

funkyguy4000

Oh thank goodness.  The trace is super close to another one and I don't wanna mess it up.
Will do! 
Accelerate to 88 miles per hour.

Hexadec

#14
Sep 24, 2012, 08:40 pm Last Edit: Sep 24, 2012, 08:44 pm by Hexadec Reason: 1
If you check out the datasheet (page 28 Table 25) it shows that you have to physically set the sync_out or sync_in bits to get any response on pin 12.

In other words it's not a problem pulling it to VSS  8)


I've been working on this chip through an 18F4550 PIC for the last few days and have just added a 512Kbit EEPROM to swap out the frame data. The EEPROM holds 38 full datasets and you can flip the data on the fly.

Great fun this ain't it.... :smiley-mr-green:
Sponge.
I'm allowed to have it 'cos it's not sharp.

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