CR14 datasheet(12/46 Pages) STMICROELECTRONICS

Part #	CR14

Description	Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision and CRC Management

PDF	46 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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3 CR14 registers

CR14

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CR14 registers

The CR14 chip coupler contains six volatile registers. It is entirely controlled, at both digital and

analog level, using the three registers listed below and shown in Table 2:

●

Parameter Register

●

Input/Output Frame Register

●

Slot Marker Register

The other 3 registers are located at addresses 02h, 04h and 05h. They are “ST Reserved”, and

must not be used in end-user applications.

In the I²C protocol, all data Bytes are transmitted Most Significant Byte first, with each Byte

transmitted Most significant bit first.

Table 2.

CR14 Control Registers

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

ST Reserved

ST Reserved, must not be used.

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

CR14 Datasheet(PDF) 12 Page - STMicroelectronics

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