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ST25DV04K Datasheet(PDF) 26 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 26 Page - STMicroelectronics |
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26 / 197 page  Figure 11. Fast transfer mode mailbox access management. Watchdog trig I2C read full msg RF read full msg I2C read MB_CTRL_Dyn RF read MB_CTRL_Dyn FTM disabled MB_CTRL_Dyn=00h No access FTM enabled Mailbox empty MB_CTRL_Dyn=01h R/W access FTM enabled RF Message MB_CTRL_Dyn=85h Read access FTM enabled Mailbox free MB_CTRL_Dyn=41/81h R/W access FTM enabled I2C Message MB_CTRL_Dyn=43h Read access MB_EN=00h or VCC OFF FTM enabled Mailbox free MB_CTRL_Dyn=61/91h R/W access MB_EN=00h or VCC OFF MB_EN=00h or VCC OFF VCC ON and MB_EN=01h I2C write msg RF write msg I2C read msg RF read msg Watchdog trig Mailbox free Note: Assuming MB_MODE=01h Assuming no error occurred 5.2 GPO GPO signal is used to alert the I2C host of external RF events or ST25DVxxx processes activity. Several causes could be used to request a host interruption. RF user can also directly drive GPO pin level using a dedicated RF command. 5.2.1 Interrupt capabilities on RF events The ST25DVxxx devices support multi interruption mode, and can report several events occurring through RF interface. In this chapter, all drawings refer to the open drain version of GPO output (ST25DVxxK-IE). The reader can retrieve the behaviour of CMOS version (ST25DVxxK-JF) by inverting the GPO curve polarity, and replacing text “released” or “high-Z” by “pull to ground”. Supported RF events are listed hereafter: ST25DV04K ST25DV16K ST25DV64K GPO DS10925 - Rev 11 page 26/197 |
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