diff --git a/boards/pocketbeagle/original/ch02.rst b/boards/pocketbeagle/original/ch02.rst index 06b2ac61f293542895399440e02ee8fa5e48c87f..91bcaa3425dda46eaba396aabaabc1344641634d 100644 --- a/boards/pocketbeagle/original/ch02.rst +++ b/boards/pocketbeagle/original/ch02.rst @@ -75,31 +75,33 @@ Rev A2 ^^^^^^^^^^^^ The Rev A2 of PocketBeagle was released to production and -[https://www.prnewswire.com/news-releases/small-in-size--cost-meet-pocketbeagle-the-25-development-board-for-hobbyists-educators-and-professionals-300519950.html\ *launched -at World MakerFaire 2017*]. +`launched at World MakerFaire 2017 <https://www.prnewswire.com/news-releases/small-in-size--cost-meet-pocketbeagle-the-25-development-board-for-hobbyists-educators-and-professionals-300519950.html>`__. Known issues in rev A2: -+----------------------------------+----------------------------------+ -| **Issue** | **Link** | -+==================================+==================================+ -| GPIO44 is incorrectly labelled | `github | -| as GPIO48 | .com/beagleboard/pocketbeagle/is | -| | sues/4 <https://github.com/beagl | -| | eboard/pocketbeagle/issues/4>`__ | -+----------------------------------+----------------------------------+ ++----------------------------------+----------------------------------------------------------------------------------+ +| **Issue** | **Link** | ++==================================+==================================================================================+ +| GPIO44 is incorrectly labelled | `Issue #4 <https://git.beagleboard.org/beagleboard/pocketbeagle/-/issues/4>`__ | +| as GPIO48 | | ++----------------------------------+----------------------------------------------------------------------------------+ Rev A2B ^^^^^^^^^^^^ -Because there are 2 TI parts which have long LT, we propose to have the following changes: - - Use ESD discrete devices instead of integrated TVS TI: TPD4S012DRYR. - Change Logic IC TI: SN74LVC1G07DCKR to Nexperia: 74LVC1G07GV,125. - -Related documents put on google drive： - -https://drive.google.com/drive/folders/14UVNA0i3mATkLZFYGYaGFKt3y6VxfSd-?usp=sharing - - +Because 2 TI parts had a long lead time, we made the following changes: + ++---------------+-------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+ +| Change # | Modification | Reference Designators | Part Type | Before（value ）| After（value) | ++==========+======================================================+=======================+==============+=================+=============================+ +| 1 | Changed C2,C3 from 18pF to 22pF. | C2,C3 | Cap Ceramic | 18pF | 22pF | ++----------+------------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+ +| 2 | Changed Y1 from 24MHz_18pF to 24MHz_22pF. | Y1 | Crystal | 24MHz_18pF | 24MHz_22pF | ++----------+------------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+ +| 3 | Use ESD discrete devices(D1-D4) to replace U3. | U3 | ESD Solution | integrated | ESD discrete devices(D1-D4) | ++----------+------------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+ +| 4 | Changed U2 from SN74LVC1G07DCKR to 74LVC1G07GV,125. | U2 | Logic | SN74LVC1G07DCKR | 74LVC1G07GV,125 | ++----------+------------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+ +| 5 | The PCB Revision for this board is Rev A2b. | The PCB Revision for this board is Rev A2b. | ++----------+------------------------------------------------------+-----------------------+--------------+-----------------+-----------------------------+