CLRC632 Datasheet, PDF (156/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
22.5.2.4 Timing for SPI compatible interface
SYMBOL
t_SCKL
t_SCKH
t_SHDX
t_DXSH
t_SLDX
t_SLNH
PARAMETER
MIN
SCK low pulse width
100
SCK high pulse width
100
SCK high to data changes
20
data changes to SCK high
20
SCK low to data changes
SCK low to NSS high
20
Table 22-13 Timing Specification for SPI
MAX
15
UNIT
ns
ns
ns
ns
ns
ns
SCK
MOSI
t_SCKL
t_SCKH
t_SCKL
t_DXSH
t_SLDX
t_SHDX
MSB
t_DXSH
LSB
MISO
NSS
MSB
LSB
t_SLNH
Figure 22 Timing Diagram for SPI
Note: To send more than bytes in one datastream the NSS signal has to low all the time.
To send more than one datastream NSS has to be set to HIGH level in between the datastreams.
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