Rx and Tx input output of 7i78
- diegoroman17
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25 Dec 2012 00:39 #28014
by diegoroman17
Rx and Tx input output of 7i78 was created by diegoroman17
Hi everybody,
Can you help me with a dude? is possible use RX pin of 7i78 card how a general purpose input and TX pin How General purpose output?
Can you help me with a dude? is possible use RX pin of 7i78 card how a general purpose input and TX pin How General purpose output?
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25 Dec 2012 01:19 #28017
by PCW
Replied by PCW on topic Rx and Tx input output of 7i78
The TX output is easily used as a GPIO output
(the TX- pin will be an inverted copy of the TX+ pin)
the RX pin is not so easy to use as its a
differential input and has a 120 Ohm termination resistor
across the input pair, You can use the 7I78 encoder inputs as GPIO
input pins in TTL mode
(the TX- pin will be an inverted copy of the TX+ pin)
the RX pin is not so easy to use as its a
differential input and has a 120 Ohm termination resistor
across the input pair, You can use the 7I78 encoder inputs as GPIO
input pins in TTL mode
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25 Dec 2012 02:32 #28019
by diegoroman17
Replied by diegoroman17 on topic Rx and Tx input output of 7i78
mmm I have used all enconder inputs. I have used my 7i76 only for one input more jjjj it is really bad. Thanks my friend. Merry Christmas
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25 Dec 2012 02:45 #28020
by PCW
Replied by PCW on topic Rx and Tx input output of 7i78
Not sure why you need the 7I78 inputs, you have 32 inputs available on the 7I76
Merry Christmas to you as well
Merry Christmas to you as well
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- diegoroman17
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26 Dec 2012 00:51 #28026
by diegoroman17
Replied by diegoroman17 on topic Rx and Tx input output of 7i78
The reason is cost and size 7i78 is cheaper that 7i76 and minor size. What about use how input step or dir signals?
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26 Dec 2012 01:37 #28028
by PCW
Replied by PCW on topic Rx and Tx input output of 7i78
The step/dir signals on the 7I78 are output only
Another option if you want the most flexibility is to use a 7I75. Then any pin can be used as you wish. You can also use standard parallel port type breakout boards (probotics,cnc4pc etc)
Another option if you want the most flexibility is to use a 7I75. Then any pin can be used as you wish. You can also use standard parallel port type breakout boards (probotics,cnc4pc etc)
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27 Dec 2012 01:28 #28049
by diegoroman17
Replied by diegoroman17 on topic Rx and Tx input output of 7i78
Is posible use 5i25 with 7i75 and generate a output of pwm? I need control three axis of stepper motor, one pwm output for my power laser source, 5 input of general purpose, 3 output of general purpose.
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27 Dec 2012 02:19 #28053
by PCW
Replied by PCW on topic Rx and Tx input output of 7i78
Sure, but you have to be OK with 3.3V signals since the I/O is just the FPGA pins directly (with protection)
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