RX95HF Datasheet, PDF (30/44 Pages) STMicroelectronics – Near field communication transceiver for tag emulation

Electrical characteristics
RX95HF
6.4
SPI characteristics
The RX95HF supports (CPOL = 0, CPHA = 0) and (CPOL = 1, CPHA = 1) modes.
Table 34. SPI interface characteristics
Symbol
Parameter
Condition
Min.
Max. Unit
f_SCK
SPI clock frequency
1/ t_c(SCK)
V_IL
Input low voltage
V_IH
Input high voltage
V_OL
Output low voltage
V_OH
t_SU(NSS)(1)
t_h(NSS)(1)
t_CH(SCKL)(1)
t_CH(SCKH)(1)
t_SU(SI)(1)
t_h(SI)(1)
t_v(SO)(1)
Output high voltage
NSS setup time
NSS hold time
Clock low time
Clock high time
Data slave Input setup time
Data slave Input hold time
Data slave output valid time
t_h(SO)(1) Data slave output hold time
After enable
edge
C_{b_SPI_IN}
Capacitive load for input pins NSS,
CLK, MOSI
2.0
MHz
0.3 x V_PS
0.7 x V_PS
V
0.4 x V_PS
0.7 x V_PS
70
ns
0
200
ns
200
20
ns
80
80
ns
3
pF
C_{b_SPI_OUT}
Capacitive load for input pins
MOSI
20
pF
1. Values based on design simulation and/or characterization results, and not on tested in production.
Figure 10. SPI timing diagram (Slave mode and CPOL = 0, CPHA = 0)
.33INPUT
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-36
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