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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) 70 Page - Microchip Technology |
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MCP3461RT-E/ST датащи(HTML) 70 Page - Microchip Technology |
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70 / 118 page  MCP3461/2/4R DS20006404C-page 70 2020-2021 Microchip Technology Inc. These three Interrupt Status bits are independent of the two other interrupt mechanisms (IRQ pin and IRQ register) and are cleared each time the STATUS byte is fully clocked. This enables the polling on the STATUS byte as a possible interrupt management solution with- out requiring to connect the IRQ pin in the system. All Status bit values are latched together just after the device address has been correctly recognized by the chip. Any interrupt happening after the two first Status bits have been clocked out will appear in the STATUS byte of the subsequent communication sequence. Figure 6-2 represents the beginning of each communication with both COMMAND and STATUS bytes depicted. After the STATUS byte is propagated, the SDO pin will be placed in high-impedance for Fast commands or Write commands and will transfer data bytes for Read commands as long as the CS pin stays logic low. FIGURE 6-2: SPI Communication Start (COMMAND Byte on SDI and STATUS Byte on SDO) when the Device Address Matches/Does Not Match CMD[7:6]. Don’t Care SCK SDI SDO CS High-Z Device Latches SDI on Rising Edge SPI Mode 0,0 SPI Mode 1,1 0 Device Address Register Address Command Type Device Address ACK Interrupts Status High-Z 0 Device Address Matches CMD[7:6] High-Z SDO Device Address does not Match CMD[7:6] Device Latches SDO on Falling Edge |
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