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ST25DV64K bảng dữ liệu(PDF) 24 Page - STMicroelectronics |
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ST25DV64K bảng dữ liệu(HTML) 24 Page - STMicroelectronics |
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24 / 197 page ![]() Figure 9. RF to I2C fast transfer mode operation I2C host ST25DV Fast Transfer Mode mailbox (256 Bytes) Dynamic registers MB_LEN_Dyn MB_CRTL_Dyn Static registers MB_MODE MB_WDG ISO/IEC 15693 reader I2C GPO/RF_PUT_MSG RF message 1Mb/s 26.5kb/s To send data from the I2C host to the RF reader, fast transfer mode must be enabled, the mailbox must be free, VCC power must be present, and the I2C host must first write the message containing data in the mailbox. The RF user must poll on MB_CTRL_Dyn register to check for the presence of a message from I2C in the mailbox. Once the complete message has been read by RF user, mailbox is considered free again and is available for receiving a new message (data is not cleared). The I2C host is informed that message has been read by RF user through a GPO interruption or by polling on the MB_CTRL_Dyn register. Figure 10. I2C to RF fast transfer mode operation I2C host ST25DV Fast Transfer Mode mailbox (256 Bytes) Dynamic registers MB_LEN_Dyn MB_CRTL_Dyn Static registers MB_MODE MB_WDG ISO/IEC 15693 reader I2C GPO/RF_GET_MSG Host message 1Mb/s Up to 53kb/s VCC supply source is mandatory to activate this feature. No precedence rule is applied: the first request is served first. ST25DV04K ST25DV16K ST25DV64K Fast transfer mode (FTM) DS10925 - Rev 11 page 24/197 |
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