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ST25DV04K Datasheet(PDF) 40 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 40 Page - STMicroelectronics |
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40 / 220 page  ST25DVxxx specific features ST25DV04K ST25DV16K ST25DV64K 40/220 DocID027603 Rev 4 I2C host is then informed (by interruption on GPO output or polling on MB_CTRL_Dyn register) that a message from RF is present in the mailbox. Once the complete message has been read by I2C, mailbox is considered free again and is available for receiving a new message (data is not cleared). The RF user is informed that the message has been read by the I2C host by polling on MB_CTRL_Dyn register. Figure 9. RF to I2C fast transfer mode operation To send data from the I2C host to the RF reader, fast transfer mode must be enabled, the mailbox must be free 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. |
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