CR95HF datasheet(39/63 Pages) STMICROELECTRONICS

Part #	CR95HF

Description	13.56-MHz multi-protocol contactless transceiver IC with SPI and UART serial access

PDF	63 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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39 / 63 page

CR95HF

Electrical characteristics

Doc ID 018669 Rev 8

39/63

6.4

SPI characteristics

The CR95HF supports (CPOL = 0, CPHA = 0) and (CPOL = 1, CPHA = 1) modes.

Figure 12.

SPI timing diagram (Slave mode and CPOL = 0, CPHA = 0)

Table 32.

SPI interface characteristics

Symbol

Parameter

Condition

Min.

Max.

Unit

fSCK

1/ tc(SCK)

SPI clock frequency

2.0

MHz

VIL

Input low voltage

0.3

VPS

VIH

Input high voltage

0.7

VOL

Output low voltage

0.4

VOH

Output high voltage

0.7

tSU(NSS)

(1)

Values based on design simulation and/or characterization results, and not on tested in production.

NSS setup time

th(NSS)

(1)

NSS hold time

tCH(SCKL)

(1)

Clock low time

200

tCH(SCKH)

(1)

Clock high time

200

tSU(SI)

(1)

Data slave Input setup time

th(SI)

(1)

Data slave Input hold time

tv(SO)

(1)

Data slave output valid time

th(SO)

(1)

Data slave output hold time

After enable

edge

150

Cb_SPI_IN

Capacitive load for input pins NSS,

CLK, MOSI

3pF

Cb_SPI_OUT

Capacitive load for input pins

MOSI

CR95HF Datasheet(PDF) 39 Page - STMicroelectronics

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