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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AS3956 데이터시트(PDF) 27 Page - ams AG |
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AS3956 데이터시트(HTML) 27 Page - ams AG |
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27 / 109 page  ams Datasheet Page 27 [v1-10] 2018-Apr-27 Document Feedback AS3956 − Detailed Description ACK Response The ACK response of AS3956 is a 4-bit value Ah. NACK Response The AS3956 uses all four combinations of NAK values. The usage of various NAK values is explained in section Error Handling. Access to UID, SENS_RES and SEL_REQ During Anti-Collision UID block, SENSR1, SENSR2 and SELR bytes are stored in the 32 byte buffer. The purpose of storing these data into the buffer is faster access to the data and UID verification during the anti-collision procedure. Buffer access over SPI / I²C is locked until NFC tag enters SELECTED state. Get Version Command In addition to standard NFC tag commands, AS3956 supports a custom Get Version command. This command consists of 8 bits and shall be transmitted only in standalone and Extended mode when the tag is SELECTED state. The command code and the tag response are shown resp. in Figure 24 and Figure 25. Figure 24: Coding of Get Version Command b8 b7 b6 b5 b4 b3 b2 b1 011000 0 0 |
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