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AS3953 数据表(PDF) 27 Page - ams-OSRAM AG |
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AS3953 数据表(HTML) 27 Page - ams-OSRAM AG |
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27 / 71 page  Page 26 ams Datasheet Document Feedback [v1-05] 2019-Feb-15 AS3953A − Detailed Description Figure below defines the coding of the AS3953A reply to Write EEPROM command. Figure 33: Write EEPROM Reply Passing of Block Data to Controller After the PICC Logic has passed the anti-collision procedure and replied with SAK on Cascade Level 2 it passes in ACTIVE(*) state. On this level it expects that blocks received from the PCD have the format according to ISO 14443A-4. The ISO 144443A Logic recognizes the command by observing the first received byte. Based on content of this byte command is either processed by the AS3953A or the complete block data is put in the FIFO for further processing by the controller. The figure below displays the decision criteria. Information Field Comment 90h Writing is normally processed 61h Writing is not done due to coding error (error in parity, CRC, nonexistent address…) 62h Writing is not done since the word is locked 64h Writing is not done due to power check fail |
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