CLRC632 Datasheet, PDF (17/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
4.4 SPI compatible interface
Additionally the serial peripheral interface (SPI) will be supported. The CL RC632 acts as a slave during the
SPI communication. The SPI clock SCK has to be generated by the master. Data communication from the
master to the slave uses the line MOSI. Line MISO is used to send data back from the CL RC632 to the
master.
CL RC632
SPI Interface
ALE
A2
A1
A0
NRD
NWR
NCS
D7 ... D1
D0
NSS
SCK
LOW
MOSI
HIGH
HIGH
LOW
do not connect
MISO
Table 4-3: SPI compatible interface
The following table shows the µ-Processor connection to the CL RC632 using the SPI interface.
LOW
SCK
LOW
MOSI
MISO
NSS
CL RC632
NCS
A2
A1
A0
D0
ALE
Figure 4-4: Connection to µ-Processors with SPI
17
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