> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/dynaflex-ii-go/documentation/developers-manuals/programmers-manual-commands/notifications/pass-through-mode-info-update.md).

# Pass-Through Mode Info Update

## Notification Source 0x03nn - Notifications from Generic Pass-Through Mode

#### Notification 0x0301 – Pass-Through Mode Information Update <a href="#ref222763564" id="ref222763564"></a>

This notification reports information about progress and state changes that occur during a Pass-Through Mode.

For this notification, Notification Detail described in section Notification Messages contains one byte each, shown in Table ‎- Notification Detail Codes, to indicate:

* The Payment Technology (PT) involved
* The Reason (Rsn) for the notification
* Detail (Det) about the notification that has different meanings depending on the Reason, and
* An Extra field (Ext) that has different meanings depending on the Reason.

## Table - Notification Detail Codes

{% hint style="info" %}
Payment Technology 0x20 EMV Contactless contains transaction notification detail codes involving contactless cards and contactless payment devices.

* Reason 0x01 = Card Event
* Reason 0x02 = Online PIN Event
* Reason 0x08 = Data Update
* Reason 0x10 = State Update
  {% endhint %}

<table data-header-hidden><thead><tr><th width="49.666656494140625"></th><th width="54.333343505859375"></th><th width="60.33331298828125"></th><th width="60"></th><th></th></tr></thead><tbody><tr><td><strong>PT</strong></td><td><strong>Rsn</strong></td><td><strong>Det</strong></td><td><strong>Ext</strong></td><td> <strong>Meaning</strong></td></tr><tr><td>20</td><td>01</td><td>04</td><td>10</td><td>Contactless, Card Event, Detected, ISO 14443 Type A (Contactless Only)</td></tr><tr><td>20</td><td>01</td><td>04</td><td>11</td><td>Contactless, Card Event, Detected, ISO 14443 Type B (Contactless Only)</td></tr><tr><td>20</td><td>01</td><td>04</td><td>12</td><td>Contactless, Card Event, Detected, Not Supported (Contactless Only)</td></tr><tr><td>20</td><td>01</td><td>05</td><td>00</td><td>Contactless, Card Event, Collision, Reserved (EMV Contactless Only)</td></tr><tr><td>20</td><td>08</td><td>04</td><td>02</td><td><p>Contactless, Data Update, NFC UID data, Data Attached</p><p>In this case, the device includes additional data, defined in Table 8 - Notification Payload for Data Update, ARQC Update (Quick Chip), Data Attached, in the Notification Payload portion of the Notification Message. (Contactless Only)</p></td></tr></tbody></table>

## Table - Notification Payload for Data Update, ARQC Update (Quick Chip), Data Attached

<table data-header-hidden><thead><tr><th width="222.6363525390625"></th><th width="54"></th><th width="154"></th><th width="55"></th><th width="55"></th><th width="80.33331298828125"></th></tr></thead><tbody><tr><td>Tag</td><td>Len</td><td>Value / Description</td><td>Typ</td><td>Req</td><td>Default</td></tr><tr><td>Beginning of Notification Message </td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><p>0101 = DynaPro Format Transaction Data</p><p>0301 = Generic Pass-Through Transaction Data</p></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>84</td><td>var</td><td>Transaction Data</td><td>B</td><td>R</td><td> </td></tr><tr><td>/null</td><td>(v)</td><td><br>EMV ARQC Type data blob, if the notification is an ARQC Update (Quick Chip) notification.  (MCE Only) If the notification is for manual card entry, the data blob does not contain Track 3 Data or MagnePrint Data.
<br>
<br>EMV Batch Data Type data blob, if the notification is a Batch Data notification.  (MCE Only) If the notification is for manual card entry, the data blob does not contain Track 3 Data or MagnePrint Data.
<br>
<br>Decoded raw barcode data, if the notification is a Barcode event notification.  If the barcode data is Base64 encoded, the device sends the decoded version in binary format.
<br>
<br>NFC UID Type reports the unique ID from the NFC tag (EMV Contactless Only)
<br>
<br>GPO Response Type reports the card’s GPO Response (EMV Contactless Only)
<br>
<br>– MIFARE Card Data Type reports the data reading from NFC/MIFARE tag (EMV Contactless Only)</td><td>B</td><td>O</td><td> </td></tr><tr><td>End of any wrappers, at minimum including <strong>Response Message</strong> </td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>


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