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ST25TA02K-P 数据表(PDF) 13 Page - STMicroelectronics |
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ST25TA02K-P 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 64 page ![]() DocID027794 Rev 2 13/64 ST25TA02K-P Signal descriptions 2.4.1 Session Open configuration (GPO field = 0x10 or 0x90) When the GPO is configured as "Session Open", it goes to the high state when an RF session is ongoing (see Figure 5). An RF session is taken when ST25TA02K-P receives a valid Select Application. The session is released when: • ST25TA02K-P receives a valid Deselect command • RF field becomes OFF GPO is driven high after a delay (1.) when the session is open. GPO is released after a delay (2.) when the session is released. Figure 5. GPO configured as Session Open (GPO field = 0x10 or 0x90) 1. CmdEOFtoGPhigh (RF command End of frame to GPORF Session pad high) 2. CmdEOFtoGPlow (RF command End of frame to GPORF Session pad low) |
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