Change History#

This section describes the change history of this document and board. Document changes are not always a result of a board change. A board change will always result in a document change.

Document Change History#

Table 89 Change History#

Rev

Changes

Date

By

A.x

Production Document

December 7, 2017

JK

0.0.5

Converted to .rst and gitlab hosting

July 21, 2022

DK

Board Changes#

Table 90 Board History#

Rev

Changes

Date

By

A1

Preliminary

February 14, 2017

JK

A2

Production. Fixed mikroBUS Click reset pins (made GPIO).

September 22, 2017

JK

A2a

Fixed label on P2_24. Was labeled GPIO48, should be GPIO44.

November 7, 2017

JK

A2b

Because there are 2 TI parts which have long lead-time, we made the following changes:

  1. Use ESD discrete devices instead of integrated TVS TI: TPD4S012DRYR.

  2. Change Logic IC TI SN74LVC1G07DCKR to Nexperia 74LVC1G07GV

June 15, 2021

JK

PocketBone#

Upon the creation of the first, 27mm-by-27mm, Octavo Systems OSD3358 SIP, Jason did a hack two-layer board in EAGLE called “PocketBone” to drop the Beagle name as this was a totally unofficial effort not geared at being a BeagleBoard.org Foundation project. The board never worked because the 32kHz and 24MHz crystals were backwards and Michael Welling decided to pick it up and redo the design in KiCad as a four-layer board. Jason paid for some prototypes and this resulted in the first successful “PocketBone”, a fully-open-source 1-GHz Linux computer in a fitting into a mini-mint tin.

Rev A1#

The Rev A1 of PocketBeagle was a prototype not released to production. A few lines were wrong to be able to control mikroBUS Click add-on board reset lines and they were adjusted.

Rev A2#

The Rev A2 of PocketBeagle was released to production and launched at World MakerFaire 2017.

Known issues in rev A2:

Issue

Link

GPIO44 is incorrectly labelled as GPIO48

Issue #4

Rev A2B#

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.