UPP connections

asad1

Intellectual 995 points

Dears;

Can I connect multiple CPUs to a UPP Bus?

At any time only one is transmitter and only one is receiver.

the master/transmitter will use an io pin to set the Enable and Start pins of the receiver.

All the cpus are on same PCB.

If yes; how many do you think we could connect together like this?

I could do it with Spi and I2c; but UPP in 8 or 16 bits mode; it much faster.

Would you please share your thoughts on this. -

thank you for your time.

over 15 years ago

0 jc-ti over 15 years ago

TI__Mastermind 27585 points

Yes this is possible.

The limitation of how many devices can be on the bus can be determined through simulation using the IBIS models provided with each device. Buffers could also be used to increase the number of devices if required, since all pins are uni-directional during operation.

Jeff

0 asad1 over 15 years ago in reply to jc-ti

Intellectual 995 points

Hi Jeff.

thanks for the answer.

while I find someone to do the IBIS simulation for me;

Just as a good estimation; do you think 8 to 10 cpus are ok or too many?

Or should I use a buffer just to make sure?

thanks

0 jc-ti over 15 years ago in reply to asad1

TI__Mastermind 27585 points

8-10 cpus on the same bus would probably require a buffer or isolating switch.

Jeff

0 asad1 over 15 years ago in reply to jc-ti

Intellectual 995 points

Thanks Jeff.

I'll work it out.

take care.

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UPP connections