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ST95HF データシート(PDF) 13 Page - STMicroelectronics

部品番号 ST95HF
部品情報  Dedicated internal frame controller
PDF  93 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST95HF データシート(HTML) 13 Page - STMicroelectronics

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ST95HF
Power management and operating modes
92
3.2
Startup sequence
After the power supply is established at power-on, the ST95HF 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).
1. Note for pin SSI0: - - - SPI selected
2. Pin IRQ_IN low level < 0.2 VPS_Main.
Note:
When ST95HF leaves WFE mode (from Power-up, Hibernate, Tag Detector, or Sleep/Field
Detector) following an IRQ_IN low level pulse.
Figure 4. ST95HF initialization and operating state change
Supply off
PowerUP
Tag Detector
Sleep /
Field Detector
Hibernate
WAIT FOR EVENT
READY
Reader
Card
Emulation
ACTIVE
Protocol
Select cde
Serial I/F
selection
IDLE
cde
Wake
UP
Protocol
Select cde
Figure 5. Power-up sequence



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