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WTS701MF/T Datasheet(PDF) 47 Page - Winbond |
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WTS701MF/T Datasheet(HTML) 47 Page - Winbond |
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47 / 77 page ![]() WTS701 Publication Release Date: May 2003 - 47 - Revision 3.09 0 1 2 3 4 5 6 70 1 2 3 4 5 6 7 Command Byte Command Data Byte 0 0 00 0 0 0 SCLK MOSI MISO SSB Figure 12. Type I SPI Transaction. Type II – Two Word Transactions that Receive Data Type II transactions are four byte transactions that read out the byte count register. As these commands are all Class0, ICMD will never be active and R/ B will never occur. Command Byte Command Data Byte Data Byte 0 (even) Data Byte 1 (odd) SCLK MOSI MISO SSB BCNT0 BCNT1 0 1 2 3 4 5 6 70 1 2 3 4 5 6 7 0 0 00 0 0 0 1 2 3 4 5 68 9 a b c d e f 7 0 Figure 13. Type II SPI Transaction. Type III – Transactions that send data Type III transactions send data to the WTS701. If the data rate exceeds the ability of the WTS701 to read data from the input FIFO or if the internal data queue becomes full then the R/ B line will handshake a pause in the SPI transaction. The host can either: • Wait for R/ B to return HIGH then continue sending data • Terminate the transaction and try sending data later |
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