CLRC663 datasheet(25/177 Pages) NXP

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NXP Semiconductors

CLRC663

High performance multi-protocol NFC frontend CLRC663 and CLRC663 plus

range BR_T1

1 to 32

33 to 64

Table 21. Settings of BR_T0 and BR_T1...continued

Serial SpeedReg

Transfer speed (kbit/s)

(Hex.)

Transfer speed accuracy (%)

7.2

-0.25

9.6

0.32

14.4

-0.25

19.2

0.32

38.4

0.32

57.6

-0.25

115.2

-0.25

128

-0.06

230.4

-0.25

460.8

-0.25

921.6

1.45

1228.8

0.32

Table 22. Selectable transfer speeds

The selectable transfer speeds as shown are calculated according to the following formulas:

if BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1)

if BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33)/2(BR_T0 - 1)

Remark: Transfer speeds above 1228.8 kBits/s are not supported.

8.4.3.2 Framing

Bit

Length

Value

Start bit (Sa)

1 bit

Data bits

8 bit

Data

Stop bit (So)

1 bit

Table 23. UART framing

Remark: For data and address bytes, the LSB bit has to be sent first. No parity bit is used during transmission.

Read data: To read out data using the UART interface, the flow described below has to be used. The first send

byte defines both the mode itself and the address. The Trigger on pin IF3 has to be set, otherwise no read of

data is possible.

Mode

byte 0

byte 1

address

data 0

Table 24. Byte Order to Read Data

CLRC663

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

Product data sheet

Rev. 5.3 — 3 January 2024

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