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LIS331DL Datasheet(PDF) 21 Page - STMicroelectronics |
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LIS331DL Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 42 page  LIS331DL Digital interfaces 21/42 Both the Read Register and Write Register commands are completed in 16 clock pulses or in multiple of 8 in case of multiple bytes read/write. Bit duration is the time between two falling edges of SPC. The first bit (bit 0) starts at the first falling edge of SPC after the falling edge of CS while the last bit (bit 15, bit 23, ...) starts at the last falling edge of SPC just before the rising edge of CS. bit 0: RW bit. When 0, the data DI(7:0) is written into the device. When 1, the data DO(7:0) from the device is read. In latter case, the chip will drive SDO at the start of bit 8. bit 1: MS bit. When 0, the address will remain unchanged in multiple read/write commands. When 1, the address will be auto incremented in multiple read/write commands. bit 2-7: address AD(5:0). This is the address field of the indexed register. bit 8-15: data DI(7:0) (write mode). This is the data that will be written into the device (MSb first). bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb first). In multiple read/write commands further blocks of 8 clock periods will be added. When MS bit is 0 the address used to read/write data remains the same for every block. When MS bit is 1 the address used to read/write data is incremented at every block. The function and the behavior of SDI and SDO remain unchanged. 5.2.1 SPI read Figure 7. SPI read protocol The SPI Read command is performed with 16 clock pulses. Multiple byte read command is performed adding blocks of 8 clock pulses at the previous one. bit 0: READ bit. The value is 1. bit 1: MS bit. When 0 do not increment address, when 1 increment address in multiple reading. bit 2-7: address AD(5:0). This is the address field of the indexed register. bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb first). bit 16-... : data DO(...-8). Further data in multiple byte reading. CS SPC SDI SDO RW DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0 AD5 AD4 AD3 AD2 AD1 AD0 MS |
Similar Part No. - LIS331DL_08 |
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Similar Description - LIS331DL_08 |
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