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CLRC663 Datasheet, PDF (20/132 Pages) NXP Semiconductors – Contactless reader IC
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NXP Semiconductors
CLRC663
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 CLRC663 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.
Table 16.
MOSI
MISO
Byte Order for MOSI and MISO
byte 0
byte 1
byte 2
address 0 data 0
data 1
X
X
X
3 to n-1
……..
……..
byte n
data n 1
X
byte n + 1
data n
X
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 CLRC663 the
LSB bit is set to logic 1. To write data to the CLRC663 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
Table 17. Address byte 0 register; address MOSI
7
6
5
4
3
2
1
0
address 6 address 5 address 4 address 3 address 2 address 1 address 0 1 (read)
0 (write)
MSB
LSB
8.4.2.5 Timing Specification SPI
The timing condition for SPI interface is as follows:
Table 18. Timing conditions SPI
Symbol
Parameter
tSCKL
tSCKH
th(SCKH-D)
tsu(D-SCKH)
th(SCKL-Q)
t(SCKL-NSSH)
tNSSH
SCK LOW time
SCK HIGH time
SCK HIGH to data input hold time
data input to SCK HIGH set-up time
SCK LOW to data output hold time
SCK LOW to NSS HIGH time
NSS HIGH time
Min Typ Max Unit
50
-
-
ns
50
-
-
ns
25
-
-
ns
25
-
-
ns
-
-
25
ns
0
-
-
ns
50
-
-
ns
CLRC663
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 3 April 2012
171133
© NXP B.V. 2012. All rights reserved.
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