From: zyagon <zy...@gm...> - 2008-03-28 00:24:17
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does anyone know.. what is USBH_PEN1 for? you have to pull-up to 3.3v USBH_PWR1, but how much current does it draw? (where is it going) what is CLK_32 for? what is BT_NRESET for? i think this is not documented anywhere yet -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16343219.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: pvm <pvm...@gm...> - 2008-03-29 16:50:18
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zyagon wrote: > > does anyone know.. > > what is USBH_PEN1 for? > you have to pull-up to 3.3v USBH_PWR1, but how much current does it draw? > (where is it going) > what is CLK_32 for? > what is BT_NRESET for? > > i think this is not documented anywhere yet > If you read the PXA270 developers manual which is posted here among other places, http://pubs.gumstix.com/documents/PXA%20Documentation/PXA270/ it tells you exactly what they are for. -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16372032.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: zyagon <zy...@gm...> - 2008-03-29 21:34:57
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thank you for your answer, but i haven't seen any reference to BT_NRESET on Table 2-7 Intel® PXA27x Processor Signal Descriptions, nor in the intel specifications at all (sp. chapter 10 UARTs) or in any website on internet. could you please tell me on which page of the intel specification you have seen what is gumstix using this signal for? i could have overlooked it. i don't find any references to CLK_32 either, i do not know if it's any of the signals specified on the Table 2-7 Intel® PXA27x Processor Signal Descriptions under 'Crystal and Clock Signals'. or is it for a 32.768-kHz input clock for operation in low-power mode as described on 22.4.9? it's called CLK_32K there and searching for 'CLK_32K gumstix' on google does not give any results, but it could have been left open for power management implementation in the future and regarding USBH_PEN1 and USBH_PWR1 i'm asking how it is implemented on gumstix, as these signals are not used on the console board, and there aren't even on the 60pin hirose connector. this could be because there is no overcurrent protection implemented and USBH_PWR1 is pulled high directly on the verdex board, and thats why i'm asking where these signal are going, and under which circumstances USBH_PWR1 has or has not to be pulled up i'm sorry if the questions are too trivial, but i couldn't find the answers yet pvm wrote: > > > zyagon wrote: >> >> does anyone know.. >> >> what is USBH_PEN1 for? >> you have to pull-up to 3.3v USBH_PWR1, but how much current does it draw? >> (where is it going) >> what is CLK_32 for? >> what is BT_NRESET for? >> >> i think this is not documented anywhere yet >> > > If you read the PXA270 developers manual which is posted here among other > places, http://pubs.gumstix.com/documents/PXA%20Documentation/PXA270/ it > tells you exactly what they are for. > > -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16374891.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: pvm <pvm...@gm...> - 2008-03-31 02:54:09
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I don't know about the other signals but, as I understand it (and as it is described in section 20.3) the USB signal, USBH_PEN1 is an output that is supposed to control power to the USB device. I have to pull USBH_PWR1 low in order to enable the USB port on the 24pin connector. There is a diagram on the wiki that says to pull it high according to the manual it is configurable so depending on what version of the build root you are using I know there are people on this list that have done it both ways. -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16391034.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Jon S. <jon...@gm...> - 2010-01-19 21:56:43
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We have created a small breakout board for the 24pin connector, giving us access to the BT-UART, USB, and other pins. The USB section is not functioning. We are pulling USBH_PRW1 high. As seen in the reference manual, it is internally high by default, leading me to believe we should pull it low. There is also reference of being able to change this default behavior. Two questions, should it be high or low, and where in the OE environment can you change the default. The USB port does work with my consoleVX board, but I need to use the Robostix board on this project. Jon -- View this message in context: http://old.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p27233434.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: zyagon <zy...@gm...> - 2008-03-31 22:22:08
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thank you for your answer. i think the console board doesn't handle USBH_PWR1 at all, and i'd like to avoid having to use it too if it's already being done on the motherboard. but according to the answers i'm getting from don anderson at gumstix it seems to be a strong secret, and due to this answer and the lack of documentation of some parts of gumstix i'm considering if it's really worth to spend my time on it pvm wrote: > > I don't know about the other signals but, as I understand it (and as it is > described in section 20.3) the USB signal, USBH_PEN1 is an output that is > supposed to control power to the USB device. I have to pull USBH_PWR1 low > in order to enable the USB port on the 24pin connector. There is a > diagram on the wiki that says to pull it high according to the manual it > is configurable so depending on what version of the build root you are > using I know there are people on this list that have done it both ways. > -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16399124.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Gordon K. <go...@gu...> - 2008-04-02 20:54:49
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USBH_PWR doesn't pertain to the Host Port <2>, (the USBH Port used by OTG) on the PXA270. Reference: PXA270 Developers Guide page 24-8 footnote 6 Gordon zyagon wrote: > thank you for your answer. i think the console board doesn't handle USBH_PWR1 > at all, and i'd like to avoid having to use it too > if it's already being done on the motherboard. but according to the answers > i'm getting from don anderson at gumstix it seems to be a strong secret, and > due to this answer and the lack of documentation of some parts of gumstix > i'm considering if it's really worth to spend my time on it > > > > pvm wrote: > >> I don't know about the other signals but, as I understand it (and as it is >> described in section 20.3) the USB signal, USBH_PEN1 is an output that is >> supposed to control power to the USB device. I have to pull USBH_PWR1 low >> in order to enable the USB port on the 24pin connector. There is a >> diagram on the wiki that says to pull it high according to the manual it >> is configurable so depending on what version of the build root you are >> using I know there are people on this list that have done it both ways. >> >> > > |
From: Gordon K. <go...@gu...> - 2008-04-02 20:59:29
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CLK_32 is GPIO(9) BT_NRESET is GPIO(12) They happen to be used as the 32kHz clock source and the reset line for the on-board bluetooth module. We brought them out by name for anyone wishing to use them for similar purposes with another BT module. Gordon > does anyone know.. > > what is USBH_PEN1 for? > you have to pull-up to 3.3v USBH_PWR1, but how much current does it draw? > (where is it going) > what is CLK_32 for? > what is BT_NRESET for? > > > i think this is not documented anywhere yet > > > > |
From: zyagon <zy...@gm...> - 2008-04-04 23:37:58
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thank you for clearing this gordon, i'll update the wiki. i suppose BT_NRESET is active low. i suppose the CLK_32 32.768kHz clock is always active (not only when bluetooth is enabled) so it can be used for other purposes (as CLK_32 is on both, the 60pin hirose and the 24pin connectors whereas BT_NRESET is only on the 24pin connector) Gordon Kruberg wrote: > > CLK_32 is GPIO(9) > BT_NRESET is GPIO(12) > > They happen to be used as the 32kHz clock source and the reset line for > the on-board bluetooth module. We brought them out by name for anyone > wishing to use them for similar purposes with another BT module. > > Gordon > > >> does anyone know.. >> >> what is USBH_PEN1 for? >> you have to pull-up to 3.3v USBH_PWR1, but how much current does it draw? >> (where is it going) >> what is CLK_32 for? >> what is BT_NRESET for? >> >> >> i think this is not documented anywhere yet >> >> >> >> > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- View this message in context: http://www.nabble.com/24pin-connector-%28verdex%29-questions%3A-USBH_PEN1%2C-USBH_PWR1%2C-SYS_EN%2C-CLK_32-tp16343219p16504761.html Sent from the Gumstix mailing list archive at Nabble.com. |