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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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COM20020 датащи(PDF) 39 Page - SMSC Corporation |
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COM20020 датащи(HTML) 39 Page - SMSC Corporation |
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39 / 82 page  39 DISCONTINUED DATASHEET Table 9 - Sub Address Register BIT BIT NAME SYMBOL DESCRIPTION 7-3 Reserved These bits are undefined. 2,1,0 Sub Address 2,1,0 SUBAD 2,1,0 These bits determine which register at address 07 may be accessed. The combinations are as follows: SUBAD2 SUBAD1 SUBAD0 Register 0 0 0 Tentative ID \ (Same 0 0 1 Node ID \ as in 0 1 0 Setup 1 / Config 0 1 1 Next ID / Register) 1 0 0 Setup 2 1 0 1 Reserved 1 1 0 Reserved 1 1 1 Reserved SUBAD1 and SUBAD0 are exactly the same as exist in the Configuration Register. SUBAD2 is cleared automatically by writing the Configuration Register. Table 10 - Configuration Register 7 Reset RESET A software reset of the COM20020 is executed by writing a logic "1" to this bit. A software reset does not reset the microcontroller interface mode, nor does it affect the Configuration Register. The only registers that the software reset affect are the Status Register, the Next ID Register, and the Diagnostic Status Register. This bit must be brought back to logic "0" to release the reset. 6 Command Chaining Enable CCHEN This bit, if high, enables the Command Chaining operation of the device. Please refer to the Command Chaining section for further details. A low level on this bit ensures software compatibility with previous SMSC ARCNET devices. |
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