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MFRC522 数据表(PDF) 14 Page - NXP Semiconductors |
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MFRC522 数据表(HTML) 14 Page - NXP Semiconductors |
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14 / 96 page  xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx Remark: The data byte can be sent directly after the address byte on pin RX. Address byte: The address byte has to meet the following format: The MSB of the first byte sets the mode used. To read data from the MFRC522, the MSB is set to logic 1. To write data to the MFRC522 the MSB is set to logic 0. Bit 6 is reserved for future use, and bits 5 to 0 define the address; see Table 14. (1) Reserved. Fig 10. UART write data timing diagram 001aak589 SA ADDRESS RX TX MX DTRQ A0 A1 A2 A3 A4 A5 (1) SO SA D0 D1 D2 D3 D4 D5 D6 D7 SO SA A0 A1 A2 A3 A4 A5 (1) SO DATA ADDRESS R/W R/W |
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