LTC1298 help
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Hi Don,
Take a look at http://www.parallaxinc.com/
There is an application note for using the LTC1298 with stamps. It's under
products/appnotes.
Myself as well as many others on the list have used this part.
Take a look at the appnote, and if you have any other questions, I'm sure
they can be answered here.
good luck
Steve
At 06:17 PM 08/11/2000 -0700, you wrote:
> Hello Group-- Want to thank Al and Frank for pointing me to the Stamp
>manual. Here are my initial conditions: +5Vdc
>gnd tied to pin 8 (+5Vdc) n/c tied to pin 4 (gnd)
> n/c all grounds tied together. Then, I try for an output with the
>following: +5Vdc gnd tied to pin 4 (gnd)
> +2Vdc from external power supply tied to pin 4 (gnd)
> high Z 'scope probe floating 1 kHz clock, 0 to +5V
>all grounds tied together. Would the data continue on pin 5 indefinitely
>or is it just a burst? There are a number of issues here, and am willing
>to take this off-line, but if others can learn from this too, all the
>better. --Don
>
Take a look at http://www.parallaxinc.com/
There is an application note for using the LTC1298 with stamps. It's under
products/appnotes.
Myself as well as many others on the list have used this part.
Take a look at the appnote, and if you have any other questions, I'm sure
they can be answered here.
good luck
Steve
At 06:17 PM 08/11/2000 -0700, you wrote:
> Hello Group-- Want to thank Al and Frank for pointing me to the Stamp
>manual. Here are my initial conditions: +5Vdc
>gnd tied to pin 8 (+5Vdc) n/c tied to pin 4 (gnd)
> n/c all grounds tied together. Then, I try for an output with the
>following: +5Vdc gnd tied to pin 4 (gnd)
> +2Vdc from external power supply tied to pin 4 (gnd)
> high Z 'scope probe floating 1 kHz clock, 0 to +5V
>all grounds tied together. Would the data continue on pin 5 indefinitely
>or is it just a burst? There are a number of issues here, and am willing
>to take this off-line, but if others can learn from this too, all the
>better. --Don
>
Comments
Want to thank Al and Frank for pointing me to the Stamp manual.
Is there anyone out there who is very· familiar with the LTC1298?· I am very new to it and have a few questions before interfacing it to the Stamp.· I'm trying to understand it's operation by using a breadboard and "manually" inputting voltages·and signals, but not getting any reasonable output, at least not what I expect.· Here are my initial conditions:
pin 8:········· +5Vdc
pin 4:··········gnd
pin 1 /CS:··· tied to pin 8 (+5Vdc)
pin 2:········· n/c
pin 3:········· tied to pin 4 (gnd)
pin 5,6,7:·····n/c
all grounds tied together.
Then, I try for an output with the following:
pin 8:········· +5Vdc
pin 4:········· gnd
pin1 /CS:···· tied to pin 4 (gnd)
pin 2:··········+2Vdc from external power supply
pin 3:········· tied to pin 4 (gnd)
pin 5:········· high Z 'scope probe
pin 6:········· floating
pin 7:········· 1 kHz clock, 0 to +5V
all grounds tied together.
I expected to see some sort of data stream on pin 5 as an indication of the 2V on pin 2, but no such luck.· Would the data continue on pin 5 indefinitely or is it just a burst?
Would be happy to go into more detail if needed.· There are a number of issues here, and am willing to take this off-line, but if others can learn from this too, all the better.
Thanks for any help.· --Don