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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP3909 датащи(PDF) 23 Page - Microchip Technology |
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MCP3909 датащи(HTML) 23 Page - Microchip Technology |
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23 / 40 page  © 2006 Microchip Technology Inc. DS22025A-page 23 MCP3909 5.2 Serial Mode Entry Codes The MCP3909 devices contains three different serial modes with data presented in 2's complement coding. • Multiplier Output • Dual Channel Output •Filter Input After entering any of these modes the active power calculation block is still functional and presents output pulses on FOUT0, FOUT1, and HFOUT. For this reason, the F2, F1, F0 output frequency selection constant can be changed with multiple command bytes for serial mode entry. The command bytes to enter these modes are described in Table 5-1. TABLE 5-1: ENTRY CODES Command D7......D0 Serial Mode Internal State of F2, F1, F0 Constants Frequency Selection During Serial Mode (1) F2 F1 F0 1 0 1 0 0 0 0 1 Multiplier Output 0 F1 pin 1 1 0 1 0 1 0 0 1 Multiplier Output 1 F1 pin 1 1 0 1 0 0 1 0 0 Dual Channel Output Pre HPF1 0 F1 pin 1 1 0 1 0 1 1 0 0 Dual Channel Output Post HPF1 1 F1 pin 1 1 0 1 0 1 0 1 0 Filter Input 1 0 F0 pin 1 0 1 0 1 1 1 0 Filter Input 1 1 F0 pin 1 0 1 0 0 0 1 0 Filter Input 0 0 F0 pin 1 0 1 0 0 1 1 0 Filter Input 0 1 F0 pin Note 1: The active power frequency outputs FOUT0, FOUT1, and HFOUT remain active after serial mode entry. Leaving the SDI (F1) and CS (F0) pins at a known state after serial communication will control the frequency selection. The HPF pin controls the state of the HPF for the multiplier mode output and the out- put pulses from the active power D to F block. |
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