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MCP3461RT-E/ST датащи(PDF) 73 Page - Microchip Technology |
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MCP3461RT-E/ST датащи(HTML) 73 Page - Microchip Technology |
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73 / 118 page ![]() 2020-2021 Microchip Technology Inc. DS20006404C-page 73 MCP3461/2/4R 6.4 Reading from the Device When the Command bit, CMD[0], is equal to ‘1’, the command is a read communication. After the STATUS byte has been transferred, the first register to be read on the SDO pin is the one with the address defined by the Command Address bits (CMD[5:2]). Any CS rising edge during a read communication aborts the current reading. The registers may need 4, 8, 16, 24 or 32 bits to be fully read depending on their address (see Table 8-1). If the CMD[1:0] bits are equal to ‘11’, the command type is Incremental Read. In this case, after each register is read, the Address Pointer is automatically incremented as long as CS stays logic low. The following data bytes are read from the next address sequentially defined in the register map. When the Address Pointer reaches 0xF (last register in the register map for reading), the next register to read is register 0x0 (see Figure 6-6 for a graphical representation of the address looping). FIGURE 6-6: Incremental Read Loop. CONFIG0 (0x1) CONFIG1 (0x2) CONFIG2 (0x3) CONFIG3 (0x4) IRQ (0x5) MUX (0x6) SCAN (0x7) TIMER (0x8) OFFSETCAL (0x9) GAINCAL (0xA) Reserved (0xB) Reserved (0xC) LOCK (0xD) Reserved (0xE) CRCREG (0xF) ADCDATA (0x0) |
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