ST25R95 datasheet(47/61 Pages) STMICROELECTRONICS

47 / 61 page

Figure 13. SPI timing diagram (Slave mode and CPOL = 1, CPHA = 1)

MOSI

MISO

tc(SCK)

th(NSS)

tCH(SCKL)

tv(SO)

th(SO)

tsu(SI)

th(SI)

NSS input

MSB out

MSB in

Bit 6 out

Bit 1 in

LSB out

LSB in

tCH(SCKH)

tSU(NSS)

CPOL = 1

CPHA = 1

6.5

RF characteristics

Test conditions are TA = 0°C to 50°C, unless otherwise specified.

VPS_TX = 3V ± 10% and VPS_MAIN = 3V ± 10%.

Table 50. Tag/Card emulation characteristics

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

Frequency of operating field (carrier frequency)

13.553 13.56 13.567 MHz

MI carrier

Carrier modulation index from reader

ISO/IEC 14443 -Type A

100

HField (1) Operating field strength in ISO/IEC 14443

1.5

7.5

A/m

VMaxCarrier Input voltage between RX1 and RX2

fS (1)

Frequency of Subcarrier modulation (ISO/IEC

14443 FeliCa and ISO/IEC 15693)

fC / 16

ALoad

Load Modulation Amplitude

fC + fS

fC - fS

ISO 10373-6 test methods for

ISO/IEC 14443-A @ 1.5 A/m

fC + fS

fC - fS

ISO 10373-6 test methods for

ISO/IEC 14443-A @ 7.5A/m

ALoad

Load Modulation Amplitude

fC + fS

fC - fS

ECMA 356 test methods for

ECMA 340 @ 1.5 A/m

fC + fS

fC - fS

ECMA 356 test methods for

ECMA 340 @ 7.5 A/m

DataR

ISO/IEC 14443 Type A

106

212

Kbps

1. Maximum values based on design simulation and/or characterization results, and not tested in production.

2. Parameter measured on samples using recommended output matching network.

ST25R95

RF characteristics

DS12807 - Rev 4

page 47/61

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