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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST25DV64K 数据表(PDF) 71 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 71 Page - STMicroelectronics |
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71 / 200 page  Figure 29. Read mode sequences Dev sel * Byte addr Byte addr Dev sel Data out 1 Data out N Current address read Dev sel Data out Random address read Dev sel * Data out Sequential current read Data out N Dev sel * Byte addr Byte addr Sequential random read Dev sel * Data out1 ACK R/W NO ACK ACK R/W ACK ACK ACK R/W ACK ACK ACK NO ACK R/W NO ACK ACK ACK ACK R/W ACK ACK R/W ACK NO ACK 6.5.3 Sequential Read access This operation can be used after a Current Address Read or a Random Address Read. The bus master does acknowledge the data byte output, and sends additional clock pulses so that the device continues to output the next byte in sequence. To terminate the stream of bytes, the bus master must not acknowledge the last byte, and must generate a Stop condition, as shown in Figure 29. Read mode sequences. The output data comes from consecutive addresses, with the internal address counter automatically incremented after each byte output. Sequential read in user memory: • Sequential read cannot cross area borders. After reaching area border, device continues to output FFh • There is no roll over inside area or at the end of user memory (ST25DVxxx returns only FFh after last user memory byte address). Sequential read in system memory: • There is no roll over after reaching end of system memory (ST25DVxxx returns only FFh after last system memory byte address). • Sequential read in dynamic registers: • It is possible to read sequentially dynamic registers and fast transfer mode’s mailbox (contiguous I2C addresses). ST25DV04K ST25DV16K ST25DV64K I2C read operations DS10925 - Rev 9 page 71/200 |
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