MFRC63002R datasheet(16/118 Pages) NXP

16 / 118 page

MFRC630

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Product data sheet

COMPANY PUBLIC

Rev. 3.1 — 6 September 2012

227531

16 of 118

NXP Semiconductors

MFRC630

Contactless reader IC

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

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.

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 12.

Selectable transfer speeds

Transfer speed (kbit/s)

Serial SpeedReg

Transfer speed accuracy (%)

(Hex.)

Table 13.

UART framing

Bit

Length

Value

Start bit (Sa)

1 bit

Data bits

8 bit

Data

Stop bit (So)

1 bit

Table 14.

Byte Order to Read Data

Mode

byte 0

byte 1

address

data 0

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