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KSZ9563RNXC 数据表(PDF) 103 Page - Microchip Technology |
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KSZ9563RNXC 数据表(HTML) 103 Page - Microchip Technology |
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103 / 226 page  2017-2018 Microchip Technology Inc. DS00002419D-page 103 KSZ9563R 5.1.5.8 ALU Table Access Control Register This register provides control and status for searching and reading or writing the ALU Table. The ALU Table Index 0 Register and ALU Table Index 1 Register contain the index values, while the ALU / Static Address Table Entry 1 Register, ALU / Static Address / Reserved Multicast Table Entry 2 Register, ALU / Static Address Table Entry 3 Register, and ALU / Static Address Table Entry 4 Register are used for the entry values. Refer to Section 5.3.1, "Address Lookup (ALU) Table," on page 181 for additional information on ALU tables. Address: 0x0418 - 0x041B Size: 32 bits Bits Description Type Default 31:30 RESERVED RO 00b 29:16 VALID_COUNT Indicates the total number of valid entries in the table after the search finishes RO 0x0000 15:8 RESERVED RO 0x00 7 START_FINISH 1 = Start the action defined below 0 = Action finished R/W, SC 0b 6 VALID For search operation. It is cleared when register 0x042F (ALU / Static Address Table Entry 4 Register) is read. 1 = Indicates that the next valid entry is ready 0 = Next valid entry is not ready RO 0b 5 VALID_ENTRY_OR_SEARCH_END For search operation. It is intended for added convenience when accessing registers by in-band management (IBA) rather than SPI or I2C. It combines bits 6 and 7. 1 = Indicates either that the next valid entry is ready, or that the search has ended. 0 = Neither next valid entry ready nor search ended. RO 0b 4:3 RESERVED R/W 00b 2 DIRECT 1 = Access by direct addressing the ALU Table. This method is used only for debugging, if at all. 0 = Hashing function is used to index the table. This is the normal method. Refer to the Switch Lookup Engine Control 0 Register. R/W 0b 1:0 ACTION Specifies the action to be taken for the ALU Table entry access 00 = No operation 01 = Write 10 = Read 11 = Search R/W 00b |
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