MFRC63002R datasheet(14/118 Pages) NXP

14 / 118 page

MFRC630

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Product data sheet

COMPANY PUBLIC

Rev. 3.1 — 6 September 2012

227531

14 of 118

NXP Semiconductors

MFRC630

Contactless reader IC

Remark: The Most Significant Bit (MSB) has to be sent first.

8.4.2.3

Write data

To write data to the MFRC630 using the SPI interface the following byte order has to be

used. It is possible to write more than one byte by sending a single address byte

(see.8.5.2.4).

The first send byte defines both, the mode itself and the address byte.

Remark: The Most Significant Bit (MSB) has to be sent first.

8.4.2.4

Address byte

The address byte has to fulfil the following format:

The LSB bit of the first byte defines the used mode. To read data from the MFRC630 the

LSB bit is set to logic 1. To write data to the MFRC630 the LSB bit has to be cleared. The

bits 6 to 0 define the address byte.

NOTE: When writing the sequence [address byte][data1][data2][data3]..., [data1] is written

to address [address byte], [data2] is written to address [address byte + 1] and [data3] is

written to [address byte + 2].

Exception: This auto increment of the address byte is not performed if data is written to

the FIFO address

8.4.2.5

Timing Specification SPI

The timing condition for SPI interface is as follows:

Table 8.

Byte Order for MOSI and MISO

byte 0

byte 1

byte 2

3 to n-1

byte n

byte n + 1

MOSI

address 0

data 0

data 1

……..

data n

1

data n

MISO

X……..

Table 9.

Address byte 0 register; address MOSI

address 6

address 5

address 4

address 3

address 2

address 1

address 0

1 (read)

0 (write)

MSB

LSB

Table 10.

Timing conditions SPI

Symbol

Parameter

Min

Typ

Max

Unit

tSCKL

SCK LOW time

tSCKH

SCK HIGH time

th(SCKH-D)

SCK HIGH to data input hold time

tsu(D-SCKH)

data input to SCK HIGH set-up time

th(SCKL-Q)

SCK LOW to data output hold time

t(SCKL-NSSH)

SCK LOW to NSS HIGH time

tNSSH

NSS HIGH time

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