NXP Semiconductors

CLRD730

PEGODA contactless smart card reader based on open-controller NFC reader PN7642 with

optional contact interface

6.2 Application architecture

The CCID example demonstrates how to implement Chip Card Interface Device functionality on to the NFC

controller-based PN7642 reader IC using the contactless and contact interface.

aaa-049327

Rx queue

for CLIF

PC/SC

Application

USB ISR

APDU

Interpreter

Rx queue

for CTIF

CLIF

TASK

USB

ISO7816

CT

TASK

- CT/CL arbitration

- exception events handling

PN7642

PC

System Task

CL events

CT events

CL

Type A/B

CT

Type A/B

Figure 15. Application architecture of the “CCID” example

The Pegoda CLRD730 desktop reader based on the NFC controller-based PN7642 reader IC in application has

the following modules:

• USB ISR – send and receive the CCID class commands through the bulk out, bulk in and interrupt endpoints.

• System task − Responsible for any exceptions

– Notification from CT/CL/Timer/PMU ISRs.

– Responsible for initiating CT/CL task messages.

• CL task − Wait for messages from system task to start CL task for polling.

– After polling wait for events from USB ISR for CCID commands.

• CT task − Wait for messages from system task to start CT task for card activation.

– Wait for events from USB ISR for CCID commands after activation.

CLRD730

All information provided in this document is subject to legal disclaimers.

© 2023 NXP B.V. All rights reserved.

Product data sheet

Rev. 3.0 — 6 July 2023

12 / 36