RF430CL331HIPWR datasheet(21/60 Pages) TI1

21 / 60 page

Enables RF field

PCD/Mobile

PICC/Dynamic Tag

Host Controller

ISO/IEC 14443B Layer 3

Handled

automatically

NDEF tag application

select

Handled

automatically

Select file?

Sets up registers for

host controller

Responds based

on existence of

file

Interrupt, Then I

Yes

Sets up Layer 4

response

Deselect

command sent

Read or write

needed?

Yes

Sets up the Layer 4

read or write request

by configuring

registers or the buffer

Services the

Layer 4 read or

write request

Interrupt, Then I

Formats response

into Type 4 format

Turn off RF field

RF430CL331H

www.ti.com

SLASE18A – SEPTEMBER 2015 – REVISED NOVEMBER 2015

5.9

Typical Operation

Figure 5-6 shows typical operation of this device. Generally, on power up or reset, the host controller

initializes this device and then enables the RF. When a PCD approaches the dynamic tag, it starts by

performing the ISO14443-B anticollision sequence. This portion is handled automatically by the

RF430CL331H.

Eventually the sequence reaches the NFC Type 4 level. When the PCD issues a file select, Read Binary

or Update Binary commands, the RF430CL331H interrupts the host controller by asserting the INT0 pin to

request the necessary information or act on the information. Each type of interrupt request is detailed in

the following sections.

Figure 5-6. High-Level Flow

Detailed Description

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