> 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/documents/developers-manuals/programmers-manual-commands/commands/generic-pass-through/iso-14443-4-apdu-pass-through.md).

# ISO 14443-4 APDU Pass-Through

## Command 0x3003 – ISO 14443-4 APDU Pass-Through Commands

After the NFC Type A or Type B card is activated, the host uses this command to send application-level APDUs to a PICC that supports ISO 14443-4 Protocol. The device sends the PICC response back to the host.

## Table ‎- Request Data for Command 0x3003 – ISO 14443-4 APDU Pass-Through Commands

<table data-header-hidden><thead><tr><th></th><th width="61.63641357421875"></th><th></th><th width="57"></th><th width="58.8182373046875"></th><th width="82.36358642578125"></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 any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>3003 = Command 0x3003 – ISO 14443-4 APDU Pass-Through Commands</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>81</td><td>var</td><td><p>Command to Send.</p><p>Should follow ISO 7816-4 APDU format</p><ul><li><p>C-APDU</p><ul><li>CLA INS P1 P2 Lc Data Le</li></ul></li></ul><p> </p></td><td> </td><td>R</td><td> </td></tr><tr><td>End of any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table ‎- Response Data for Command 0x3003 – ISO 14443-4 APDU Pass-Through Commands

<table data-header-hidden><thead><tr><th></th><th width="52.54541015625"></th><th></th><th width="59.9090576171875"></th><th width="54.3636474609375"></th><th width="83.3636474609375"></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 any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>3003 = Command 0x3003 – APDU Pass-Through Commands</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>81</td><td>02</td><td><p>Tag Response (SW1 SW2)</p><p>Should follow ISO 7816-4 APDU format</p><p>·         SW1 and SW2 of R-APDU</p><p> </p><p>If card is not able to respond:</p><p>SW1 = 0x64, SW2 = 0x00</p></td><td>B</td><td>R</td><td>N/A</td></tr><tr><td>82</td><td>Var</td><td><p>Tag Data</p><p>·         Data of R-APDU</p></td><td>B</td><td>O</td><td>N/A</td></tr><tr><td>End of any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table - Request Example

**Example (Hex)**

```
AA 00 81 04 01 A1 30 03 84 09 30 03 81 05 90 60 00 00 00
```

## Table - Response Example

```
AA 00 81 04 82 A1 30 03 82 04 01 00 00 00 84 14 30 03 81 02 91 AF 82 0C FC 0A DF 
7A 07 04 01 01 33 00 18 05
```


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