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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP3461RT-E/ST датащи(PDF) 74 Page - Microchip Technology |
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MCP3461RT-E/ST датащи(HTML) 74 Page - Microchip Technology |
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74 / 118 page  MCP3461/2/4R DS20006404C-page 74 2020-2021 Microchip Technology Inc. If the CMD[1:0] bits are equal to ‘01’, the command type is Static Read. In this case, the register address defined in the COMMAND byte is read continuously. The Address Pointer is automatically incremented. Continuously clocking SCK while CS stays logic low will continuously read the same register. Reading another register is only possible by aborting the current communication sequence by raising CS and issuing another command. In both Static and Incremental modes, the registers are updated after each register read is fully performed. If the value of the register changes internally during the read, it will only be updated after the end of the read. The value of each register is latched in the SDO Output Shift register at the first rising edge of SCK of each individual register reading. Figure 6-7 shows the bit by bit details of a single register Read communica- tion. Figure 6-8 shows the examples of Static and Incremental Read communications. FIGURE 6-7: Single Read SPI Communication (Static or Incremental Read). SPI Mode 1,1; Example with a 24-Bit Wide Register Located at Address CMD<5:2> SPI Mode 0,0 ; Example with a 24-Bit Wide Register Located at Address CMD<5:2> Don’t Care Don’t Care Don’t Care SCK SDI SDO 1 CS DATA<23> High-Z Device Latches SDI on Rising Edge Device Latches SDO on Falling Edge High-Z Don’t Care Don’t Care SCK SDI SDO CS DATA<0> High-Z High-Z Device Latches SDI on Rising Edge Device Latches SDO on Falling Edge 1 0 0 0 A<6> 0 0 0 |
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