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AS3955 数据表(PDF) 49 Page - ams AG |
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AS3955 数据表(HTML) 49 Page - ams AG |
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49 / 111 page  ams Datasheet Page 49 [v1-01] 2015-Apr-29 Document Feedback AS3955 − Detailed Description Figure 52: Data Transmission in Extended Mode If MCU decides to update the buffer before the NFC device issues a WRITE command to address FFh, a I_acc_err interrupt will be triggered, signaling that buffer cannot be accessed (see Interrupt Register 1). Relevant Registers, Interrupts and Commands Relevant Registers: • Buffer Status Register 1 (status flags : rf_busy, rf_data_rdy, io_data_rdy) Relevant Interrupts: • Rx start (I_rxs bit in Interrupt Register 1) • Rx end, Tx end (resp. I_rxe and I_txe bits in Interrupt Register 0) Commands: • Transmit Buffer • Clear Buffer PCD AS3955 MCU Transmit WRITE @ FFh READ @ FC h DATA WRITE IN Tx end |
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