Avnet Reach Further Ultra96-V2 User manual

Ultra96-V2-Errata概要-

2
PMICの過電流Warningが出る
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Errata内容
Workaround
-Pmicの閾値の設定値が低すぎたため、電流がスパイク
した際に、warningのトリガーとなっております。
-評価ボードを使用する上では、問題ないので、無視
してください。Warningを消したい際には、閾値を1.5A
に設定してください。

3
Quick Start Card誤記
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Errata内容
Workaround
-左記付属カードに誤記があります。Step8にて、電源オフにした
場合、すべてのLEDが消えると書いてありますが、実際には、
D17は光つづけます。（電源アダプタが挿さっている限り）
-http://ultra96.org/support/documentation/28476よりUpdateされた
Quick Start Cardをダウンロードしてください。

4
SD card cage不良
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Errata内容
Workaround
-赤枠のSDカードケージにて、付属SDカードの出し入れがスムー
ズに行われない場合があります。(全てのボードに見れる現象では
ありません。)
-付属のSDカードより、出し入れスムーズなSanDiskマイクロSD
カードをご提供いたします。（ご希望の際は別途支給の為、ご連絡
ください）

5
該当ロット識別方法
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番号確認
Workaround
-ボード裏に記載してある製造日ラベルの4桁番号を確認してください。(左記緑枠
ないし、その下の拡大図）
1917とは2019年の17週目に製造、
すなわち4月21日の週
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-Pmicの過電流warning: ラベル4桁番号が1927ないし、それより前の番号は該当
-Quick Start Card誤記 :ラベル4桁番号が1927ないし、それより前の番号は該当
-SD Card Cage不良 :ラベル4桁番号が1923ないし、それより前の番号は該当可能性有り
識別方法

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Avnet Ultra96-V2
Revision 1 Errata
14 June 2019

Page 2
Table of Contents
1Introduction .........................................................................................................3
2Identifying Affected Modules................................................................................3
3Errata..................................................................................................................5
3.1 Quick-Start Cards Claim No LED Lit When Powered Off.......................................................5
3.1.1 Applications Affected.......................................................................................................... 5
3.1.2 Description.........................................................................................................................5
3.1.3 Workaround........................................................................................................................5
3.1.4 Identifying Repaired or New Boards...................................................................................5
3.2 Over-current Warning for Switcher A on Pmic 0x14...............................................................6
3.2.1 Applications Affected.......................................................................................................... 6
3.2.2 Description.........................................................................................................................6
3.2.3 Workaround........................................................................................................................8
3.2.4 Identifying Repaired or New Boards...................................................................................8
3.3 Issues Inserting or Ejecting the microSD Card.......................................................................9
3.3.1 Applications Affected.......................................................................................................... 9
3.3.2 Description.........................................................................................................................9
3.3.3 Workaround........................................................................................................................9
3.3.4 Identifying Repaired or New Boards...................................................................................9
4New Erratum .....................................................................................................10
5Additional Support.............................................................................................10
6Revision History ................................................................................................10

Page 3
1 Introduction
Thank you for your interest in the Avnet Ultra96-V2 Single-Board Computer. Although Avnet has made
every effort to ensure the highest possible quality, these kits and associated software are subject to the
limitations described in this errata notification.
Be aware that any of the optional workarounds requiring physical modifications to the board are done at
the User’s own risk, and Avnet is not liable for poorly performed rework.
2 Identifying Affected Modules
The modules affected by these errata can be identified by the Date Code of the Ultra96-V2 Single-Board
Computer. The date code of the Ultra96-V2 Single-Board Computer can be found on the bottom side of the
PCB board near the edge on the backside opposite the Wi-Fi module (removing the thermal bracketis NOT
necessary).
The datecode is a 4-digit number indicating Year and Week of manufacture, in YYWW format. Therefore,
a datecode of 1922 is the 22nd week of 2019, which is the week of May 26th, 2019.
The datecode is found on the 4th line of the sticker on the backside of the board as seen in the following
two figures.
Figure 1 – Ultra96-V2 Backside (Bracket Removed)

Page 4
Figure 2 – Datecode of 1917 is 17th week of 2019, which is week of April 21st

Page 5
3 Errata
3.1 Quick-Start Cards States No LED Lit When Powered Off
3.1.1 Applications Affected
Kits whose Ultra96-V2 boards have a datecode of 1927 or earlierinclude a printed Quick-Start Card
with this error.
3.1.2 Description
The printed Quick-Start Card does not properly account for LED D17, which is the 12V VIN LED.
Any time a live 12V is plugged into the barrel jack, this LED will light, regardless of the power state
of the board. The intention for this LED is to remind users that 12V is active any time that the barrel
jack is plugged in. The barrel jack must be unplugged when pods or mezzanines are attached or
detached from the Ultra96-V2.
The Quick-Start Card should have identified the LED in Step 5. Step 8 claims after the shutdown
sequence that “All the LEDs will turn off.” This is incorrect as D17 will not turn off until the barrel
jack is unplugged.
3.1.3 Workaround
An updated digital copy of the Quick-Start Card with these corrections is available at
http://avnet.me/ultra96-v2 Documentation.
3.1.4 Identifying Repaired or New Boards
New kits will be produced with the updated Quick-Start Card. These will have datecode 1931 or
later.

Page 6
3.2 Over-current Warning for Switcher A on Pmic 0x14
3.2.1 Applications Affected
Ultra96-V2 boards having a datecode of 1927 or earlier will exhibit this behavior.
3.2.2 Description
The Infineon Pmics used on Ultra96-V2 are programmable devices that include voltage value,
warning, and fault settings. Reference Designator U12 is an Infineon IRPS5401 with an address
setting of 0x14. Switcher A on this device delivers 1.8V to the Ultra96-V2 which is VCC_PSAUX.
this can be seen on Sheet 16 of Ultra96-V2 Rev 1 schematics. This rail was designed to deliver a
maximum steady-state current of 1.0A.
Figure 3 – Ultra96-V2 Schematic Page for Pmic #2, 0x14
For the affected boards, the warning threshold was set too low, such that occasional current spikes
will trigger an over-current warning. This is only seen if actively monitoring in the Infineon
PowIRCenter software, as shown in the figures below. The warning does NOT affect the proper
operation of the board.

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Figure 4 – PowIRCenter Shows Warning on Switcher A of 0x14

Page 8
Figure 5 – Detailed Warning Shows IOUT Over-Current Warning
3.2.3 Workaround
It is not necessary to perform a work-around. This warning may be safely ignored. However, the
Infineon Pmic warning thresholds may be adjusted to 1.5A to eliminate this warning.
3.2.4 Identifying Repaired or New Boards
The programming files will be adjusted to eliminate the warning on boards with datecode 1931 or
later.

Page 9
3.3 Issues Inserting or Ejecting the microSD Card
3.3.1 Applications Affected
Ultra96-V2 boards have a datecode of 1923 or earlier may exhibit this behavior.
3.3.2 Description
Some of the first 1000 kits may have a microSD card cage where the card insertion and ejection
isn't smooth with the included Delkin card. This is NOT due to the Delkin card, which is entirely
within specification. This is due to a lack of lubricant inside the sliding mechanism of the cage. All
boards are functional and passed our factory functional test. However, if you find your cage starts
to malfunction, you may request a free SanDisk microSD card from your Avnet FAE. The SanDisk
card is marginally thinner, which is enough to make a difference. You may also request an RMA
through your Avnet sales organization within the first 60 days, and we will replace your board.
3.3.3 Workaround
A thinner SanDisk microSD card may alleviate this issue. You may requesta freeSanDisk microSD
card from your Avnet FAE. Alternatively, you may request an RMA to replace your board within 60
days of receiving your board.
3.3.4 Identifying Repaired or New Boards
Avnet does not plan torepair the affected boards. New boards with datecode of 1924 or latershould
not exhibit this issue.

Page 10
4 New Erratum
Any new erratum found will be posted to the Ultra96-V2 website forum:
http://avnet.me/Ultra96-V2_Errata
5 Additional Support
For additional support, please review the discussions and post your questions in the Ultra96-V2 Forum:
http://avnet.me/Ultra96_Forum
You may also contact your local Avnet FAE.
6 Revision History
Date Version Revision
14 Jun 2018 1.0 Added Items 3.1, 3.2, and 3.3