ST25R95 datasheet(8/61 Pages) STMICROELECTRONICS

部件名	ST25R95

功能描述	Near field communication transceiver

PDF	61 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

8 / 61 page

Figure 5 shows the power-up sequence for a ST25R95 device; where:

•

t0 is the initial wake-up delay

100 μs (minimum)

•

t1 is the minimum interrupt width

10 µs (minimum)

•

t2 is the delay for the serial interface selection

250 ns (typical)

•

t3 is the HFO setup time (tSU(HFO))

10 ms (maximum)

•

t4 is the VPS ramp-up time from 0V to VPS

10 ms (max. by design validation)

Note:

VPS must be 0V before executing the start-up sequence.

The serial interface is selected after the following falling edge of pin IRQ_IN when leaving from POR or

Hibernate state.

Table 4 lists the signal configuration used to select the SPI communication interface.

Table 4. Select serial communication interface selection table

SPI interface

SSI_0

SSI_1

ST25R95

Startup sequence

DS12807 - Rev 4

page 8/61

ST25R95 数据表(PDF) 8 Page - STMicroelectronics