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ST25DV64K 数据表(PDF) 20 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 200 page ![]() 4.5 Fast transfer mode mailbox ST25DVxxx fast transfer mode uses a dedicated mailbox buffer for transferring messages between RF and I2C worlds. This mailbox contains up to 256 Bytes of data which are filled from the first byte. Fast transfer mode mailbox is accessed in bytes from both RF and I2C. In RF, mailbox is read via a dedicated (Fast) Read Message command. Read can start from any address value inside the mailbox, between 00h and FFh. Writing in the mailbox is done via the (Fast) Write Message command in one shot, always starting at mailbox address 00h. No password is needed to access mailbox from RF, but fast transfer mode must be enabled. In I2C, mailbox read can start from any address value between 2008h and 2107h. Write mailbox MUST start from address 2008h to a max of 2107h. No password is needed to access mailbox from I2C, but fast transfer mode must be enabled. Table 13. Fast transfer mode mailbox memory map shows the map of fast transfer mode mailbox, as seen by RF interface and by I2C interface. Table 13. Fast transfer mode mailbox memory map RF access Fast transfer mode buffer I2C access Address Type Name Function Device select Address Type 00h R/W MB_Dyn Byte 0 Fast transfer mode buffer (256-Bytes) E2 = 0 2008h R/W 01h R/W MB_Dyn Byte 1 E2 = 0 2009h R/W … … … E2 = 0 ... ... FEh R/W MB_Dyn Byte 254 E2 = 0 2106h R/W FFh R/W MB_Dyn Byte 255 E2 = 0 2107h R/W ST25DV04K ST25DV16K ST25DV64K Fast transfer mode mailbox DS10925 - Rev 9 page 20/200 |
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