AN2399 datasheet(18/22 Pages) STMICROELECTRONICS

18 / 22 page

RFID library

AN2399

18/22

Table 2.

Control registers

8.3.1

CRX14 parameter register access

Figure 9.

CRX14 parameter register: write operation

Figure 10.

CRX14 parameter register: read operation

Here are the functions used for parameter register access:

int Write_CRX14_PR(UCHAR *DATA)

int Read_CRX14_PR(UCHAR *DATA)

Address

Length

Access

Purpose

00h

Parameter Register

1 Byte

Set parameter register

Read parameter register

01h

Input/Output Frame

36 Bytes

Store and send request frame to the

PICC. Wait for PICC answer frame

Transfer PICC answered frame data to

host

02h

Authenticate Register

Start the Authentication process

Get the Authentication process

03h

Slot Marker Register

1 Byte

Launch the automated anti-collision

process from Slot_0 to Slot_15

Return data FFh

04h

ST Reserved

R and W

ST Reserved. Must not be used

05h

ST Reserved

R and W

ST Reserved. Must not be used

1 0 1 0 X X X

00h

data

ACK

Value

Parameter Register

Address

Device Select

Code

Bus Master

CRX14 Write

Bus Slave

R/W

1010 X X X

00h

data

ACK

Value

Parameter Register

Address

Device Select

Code

Bus Master

CRX14 Read

Bus Slave

1 0 1 0 XXX

R/W

Device Select

Code

R/W

NoACK

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