RX95HF Datasheet, PDF (9/44 Pages) STMicroelectronics – Near field communication transceiver for tag emulation

RX95HF
Power management and operating modes
Figure 4. RX95HF initialization and operating state change
3.2
Note:
Startup sequence
After the power supply is established at power-on, the RX95HF waits for a low pulse on the
pin IRQ_IN (t₁) before automatically selecting the external interface (SPI) and entering
Ready state after a delay (t₃).
Figure 5. Power-up sequence
T_
603
6
33)?
33)?
T_
)21?).
T_
&IRSTVALID
T_
COMMAND
T_
-36
1. Pin IRQ_IN low level < 0.2 VPS_Main.
When RX95HF leaves WFE mode (from Power-up, Hibernate, or Sleep/Field Detector)
following an IRQ_IN low level pulse.
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