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SMSXXXAF датащи(PDF) 45 Page - Numonyx B.V |
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SMSXXXAF датащи(HTML) 45 Page - Numonyx B.V |
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45 / 61 page ![]() SMSxxxAF, SMSxxxFF, SMSxxxBF Serial peripheral interface (SPI) mode 45/61 Figure 34. Read Data Error 7.2.4 Data Write Single and Multiple Block Write operations are supported in SPI mode. Upon reception of a valid write command, the card sends a response token and waits for a data block to be sent from the host. Write operations, as illustrated in <Blue>Figure 35., follow the same rules as Read operations (refer to Section 7.2.4: Data Write) as regards the CRC, block length and start address. After receiving a data block, the card returns a data response token. If the data block received contains no error, it is programmed. Throughout the programming operation the card sends a continuous stream of busy tokens to the host (by holding the DataOut line Low). Figure 35. Write Operation 7.2.5 Erase & Write Protect Management The erase and write protect management procedures are the same in the SPI and SD modes. While the card is erasing or changing the write protection bits, it remains in the busy state and holds the DataOut line Low. Figure 36. Erase & Write Protect Operations Command Command Data in Data out ai10068 from Card to Host from Host to Card next command Response Data Error Data Error message from Card to Host Command Data in Data out ai10069 from Card to Host from Host to Card Response Data Response Busy data from Host to Card Data Block > Data Response Busy Data Block > > Data start token Data Response and Busy from Card data from Host to Card Data stop token Command Command Data in Data out ai10070 from Card to Host from Host to Card from Host to Card Response Response from Card to Host Busy |
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