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TPU pin state

TPU pin state

2003-01-09 by Andrei Chichak

When a TPU pin is not programmed, does it default to an input, output, or 
is it high Z?

What is the proper way to stop a TPU port so that it goes back to default 
state? Just set the channel priority to disabled?

I have a TPU UART transmitter channel that I want to disable until the 
remote party initiates a conversation. I currently set the channel to be a 
receiver until it is needed then it is disabled and turned into a 
transmitter. I have since changed my code to simply set the channel 
priority to disabled until it is needed.

Andrei

-------
Andrei Chichak               #200 10835-120 Street
Senior Software Developer    Edmonton, Alberta
Pulmonox Medical Inc.        Canada
                              T5H 3P9
                              (W) (780) 451-3660
                              (F) (780) 452-0169

RE: [68300] TPU pin state

2003-01-09 by Melear Charles-rdph40

Hello everyone,
 
Unprogrammed TPU pins become inputs and have no function.
 
They cannot be used as I/O or anything.  Only the TPU can use these pins.
 
Charlie
Show quoted textHide quoted text
-----Original Message-----
From: Andrei Chichak [mailto:acpmiedm@...]
Sent: Thursday, January 09, 2003 1:20 PM
To: 68300@yahoogroups.com
Subject: [68300] TPU pin state


When a TPU pin is not programmed, does it default to an input, output, or 
is it high Z?

What is the proper way to stop a TPU port so that it goes back to default 
state? Just set the channel priority to disabled?

I have a TPU UART transmitter channel that I want to disable until the 
remote party initiates a conversation. I currently set the channel to be a 
receiver until it is needed then it is disabled and turned into a 
transmitter. I have since changed my code to simply set the channel 
priority to disabled until it is needed.

Andrei

-------
Andrei Chichak               #200 10835-120 Street
Senior Software Developer    Edmonton, Alberta
Pulmonox Medical Inc.        Canada
                              T5H 3P9
                              (W) (780) 451-3660
                              (F) (780) 452-0169


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To learn more about Motorola Microcontrollers, please visit
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[Non-text portions of this message have been removed]

RE: [68300] TPU pin state

2003-01-09 by Andrei Chichak

Thanks Charlie,

The second part of the question was does setting the channel priority, of a 
configured channel, to disabled make the pin into an input with no function?

Thanks
Andrei

At 12:57 PM 1/9/2003 -0700, you wrote:
Show quoted textHide quoted text
>Hello everyone,
>
>Unprogrammed TPU pins become inputs and have no function.
>
>They cannot be used as I/O or anything.  Only the TPU can use these pins.
>
>Charlie
>
>-----Original Message-----
>From: Andrei Chichak [mailto:acpmiedm@...]
>Sent: Thursday, January 09, 2003 1:20 PM
>To: 68300@yahoogroups.com
>Subject: [68300] TPU pin state
>
>
>When a TPU pin is not programmed, does it default to an input, output, or
>is it high Z?
>
>What is the proper way to stop a TPU port so that it goes back to default
>state? Just set the channel priority to disabled?
>
>I have a TPU UART transmitter channel that I want to disable until the
>remote party initiates a conversation. I currently set the channel to be a
>receiver until it is needed then it is disabled and turned into a
>transmitter. I have since changed my code to simply set the channel
>priority to disabled until it is needed.
>
>Andrei
>
>-------
>Andrei Chichak               #200 10835-120 Street
>Senior Software Developer    Edmonton, Alberta
>Pulmonox Medical Inc.        Canada
>                               T5H 3P9
>                               (W) (780) 451-3660
>                               (F) (780) 452-0169
>
>
>---------------------------------------------------
>To unsubscribe from this group, send an email to:
>68300-unsubscribe@yahoogroups.com
>
>To learn more about Motorola Microcontrollers, please visit
>http://www.motorola.com/mcu <http://www.motorola.com/mcu>
>
>
>
>Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service 
><http://docs.yahoo.com/info/terms/> .
>
>
>
>
>[Non-text portions of this message have been removed]
>
>
>
>---------------------------------------------------
>To unsubscribe from this group, send an email to:
>68300-unsubscribe@yahoogroups.com
>
>To learn more about Motorola Microcontrollers, please visit
>http://www.motorola.com/mcu
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

RE: [68300] TPU pin state

2003-01-09 by Melear Charles-rdph40

Andrei,
 
Changing the channel priority will not do anything to a TPU pin.
 
Suppose that you configured a TPU channel to be a PWM, which makes the TPU pin an output.  Well, the pin will just sit there and give a nice PWM.  
 
If you change the channel priority to %00 (no priority) then the TPU channel will never get serviced again.  The pin will remain an output at the level it was at when the channel priority was set to %00.
 
Once again, changing the channel priority to %00 will not reset a TPU channel or make it become an input or anything else.
 
Regards,
 
Charlie
Show quoted textHide quoted text
-----Original Message-----
From: Andrei Chichak [mailto:acpmiedm@...]
Sent: Thursday, January 09, 2003 3:05 PM
To: 68300@yahoogroups.com
Subject: RE: [68300] TPU pin state


Thanks Charlie,

The second part of the question was does setting the channel priority, of a 
configured channel, to disabled make the pin into an input with no function?

Thanks
Andrei

At 12:57 PM 1/9/2003 -0700, you wrote:
>Hello everyone,
>
>Unprogrammed TPU pins become inputs and have no function.
>
>They cannot be used as I/O or anything.  Only the TPU can use these pins.
>
>Charlie
>
>-----Original Message-----
>From: Andrei Chichak [mailto:acpmiedm@...]
>Sent: Thursday, January 09, 2003 1:20 PM
>To: 68300@yahoogroups.com
>Subject: [68300] TPU pin state
>
>
>When a TPU pin is not programmed, does it default to an input, output, or
>is it high Z?
>
>What is the proper way to stop a TPU port so that it goes back to default
>state? Just set the channel priority to disabled?
>
>I have a TPU UART transmitter channel that I want to disable until the
>remote party initiates a conversation. I currently set the channel to be a
>receiver until it is needed then it is disabled and turned into a
>transmitter. I have since changed my code to simply set the channel
>priority to disabled until it is needed.
>
>Andrei
>
>-------
>Andrei Chichak               #200 10835-120 Street
>Senior Software Developer    Edmonton, Alberta
>Pulmonox Medical Inc.        Canada
>                               T5H 3P9
>                               (W) (780) 451-3660
>                               (F) (780) 452-0169
>
>
>---------------------------------------------------
>To unsubscribe from this group, send an email to:
>68300-unsubscribe@yahoogroups.com
>
>To learn more about Motorola Microcontrollers, please visit
> http://www.motorola.com/mcu <http://www.motorola.com/mcu>  < http://www.motorola.com/mcu <http://www.motorola.com/mcu> >
>
>
>
>Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service 
>< http://docs.yahoo.com/info/terms/ <http://docs.yahoo.com/info/terms/> > .
>
>
>
>
>[Non-text portions of this message have been removed]
>
>
>
>---------------------------------------------------
>To unsubscribe from this group, send an email to:
>68300-unsubscribe@yahoogroups.com
>
>To learn more about Motorola Microcontrollers, please visit
> http://www.motorola.com/mcu <http://www.motorola.com/mcu> 
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ <http://docs.yahoo.com/info/terms/> 


---------------------------------------------------
To unsubscribe from this group, send an email to:
68300-unsubscribe@yahoogroups.com

To learn more about Motorola Microcontrollers, please visit
http://www.motorola.com/mcu <http://www.motorola.com/mcu> 



Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . 




[Non-text portions of this message have been removed]

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