RF430CL331HIPWR datasheet(22/60 Pages) TI1

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Configures the

registers to

describe the

request and then

asserts the

interrupt

Reader (PCD)

Dynamic NFC Tag

(PICC)

Reads the file ID

from the registers

Host Controller

INTO

Interrupt

Does the file

exist?

Sets the Host

Response register

accordingly

Yes/No

Examines the

response and

converts it to a

Type 4 protocol

format and sends

it to the PCD

PCD sends the Select File

request with a file identifier

Decides whether to

proceed with reading or

writing

RF430CL331H

SLASE18A – SEPTEMBER 2015 – REVISED NOVEMBER 2015

www.ti.com

5.9.1

NDEF or Capability Container Select Procedure

This select procedure does not change between selection of the capability container or an NDEF file.

These two types of selects can be differentiated by the file identifier that the RF430CL331H reports in the

NDEF File Identifier register (see Section 5.11.7).

For the general flow, see Figure 5-7.

Figure 5-7. Select System Flow

The procedure:

1. PCD procedure:

(a) Issues a Capability Container or a NDEF File Select command.

2. RF430CL331H procedure:

(a) Receives the RF packet.

(b) Sets the NDEF File Identifier register (see Section 5.11.7) using the file identifier that was included

in the packet from the PCD.

describe the file select request.

(d) Ensure that General Type 4 request interrupt is enabled to generate the required interrupt on the

INTO pin.

3. Host controller procedure:

(a) Interrupt is received.

(b) Checks the source of the interrupt by reading the interrupt registers (see Section 5.11.3).

(d) When there is a General Type 4 request, the Status register (see Section 5.11.2) must be read

and the Type 4 Command field examined to determine what Type 4 command has been received.

(e) The result is a File Select command.

(f) The NDEF File Identifier register (see Section 5.11.7) should be read.

(g) The host controller should, search its available files and determine if the file exists.

(h) The interrupt must be cleared by writing to the Interrupt Flag register (see Section 5.11.3). This

step must be done before setting the Interrupt Serviced field in the Host Response register (see

Section 5.11.8).

(i) If a specific Status Word (SW) response is necessary (generally for communicating specific error

conditions) to the Select command:

(i) Set the Custom Status Word Response register (see Section 5.11.13) with the desired status

word.

(ii) Set the Use Custom SW Response bit in the Host Response register (see Section 5.11.8).

(j) To complete servicing the Select command interrupt, set the Interrupt Serviced field in the Host

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