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MCP4716 датащи(PDF) 48 Page - Microchip Technology |
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MCP4716 датащи(HTML) 48 Page - Microchip Technology |
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48 / 86 page ![]() MCP4706/4716/4726 DS22272A-page 48 © 2011 Microchip Technology Inc. 5.3.7 GENERAL CALL The General Call is a method that the “Master” device can communicate with all other “Slave” devices. In a Multi-Master application, the other Master devices are operating in Slave mode. The General Call address has two documented formats. These are shown in Figure 5-11. The MCP47X6 has two General Call Commands. The function of these commands are: • Reset the device(s) (Software Reset) • Wake-Up the device(s) For details on the operation of the MCP47X6’s General Call Commands, see Section 6.6. FIGURE 5-11: General Call Formats. Note: Only one General Call command per issue of the General Call control byte. Any additional General Call commands are ignored and Not Acknowledged. 0 00 0 S 0 000 X X XXX A X X0 AP General Call Address Second Byte “7-bit Command” Reserved 7-bit Commands (By I2C Specification - NXP specification # UM10204, Rev. 03 19 June 2007) ‘0000 011’ b - Reset and write programmable part of slave address by hardware. ‘0000 010’ b - Write programmable part of slave address by hardware. ‘0000 000’ b - NOT Allowed The Following is a “Hardware General Call” Format 0 00 0 S0 0 0 0 X XX XX AX X 1 A General Call Address Second Byte “Master Address” X X X X X XXX AP n occurrences of (Data + A) This indicates a “Hardware General Call” |
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