ACD82224 Datasheet, PDF (73/77 Pages) List of Unclassifed Manufacturers – 24 Ports 10/100 Fast Ethernet Switch

address will be stored into DataReg5 – DataReg0, with DataReg5 contains the MSB of the MAC
address and DataReg0 contains the LSB. The port number is stored in DataReg6, and the Flag^*
bits are stored in DataReg7.The Read Pointer will be set to point to second entry of the address
book.
Note – the Flag bits are defined as:
b7
b6
b5
b4
b3
b2
Rsvd
Rsvd
Filter
Lock
New
Old
b1
b0
Age
Valid
Where
•
•
•
•
•
•
•
Filter – 1 indicates the frame heading to this address should be dropped.
Lock – 1 indicates the entry should never be changed or aged out.
New – 1 indicates the entry is a newly learned address.
Old – 1 indicates the address has been aged out.
Age – 1 indicates the address has not been visited for current age cycle.
Valid – 1 indicates the entry is a valid one.
Rsvd – Reserved bits.
Command 11H
Description: Read next entry of address book.
Parameter: None
Result: The result is indicated by the Result register. If the command is completed with no error,
the content of the address book entry pointed by Read Pointer will be stored into the Data
registers. The MAC address will be stored into DataReg5 – DataReg0, with DataReg5 contains
the MSB of the MAC address and DataReg0 contains the LSB. The port number is stored in
DataReg6, and the Flag bits are stored in DataReg7. The Read Pointer will be increased by one.
Command 20H
Description: Read first valid entry.
Parameter: None
Result: The result is indicated by the Result register. If the command is completed with no error,
the content of first valid entry of the address book will be stored into the Data registers. The MAC
address will be stored into DataReg5 – DataReg0, with DataReg5 contains the MSB of the MAC
address and DataReg0 contains the LSB. The port number is stored in DataReg6, and the Flag
bits are stored in DataReg7. The Read Pointer is set to point to this entry.
Command 21H
Description: Read next valid entry.
Parameter: None
Result: The result is indicated by the Result register. If the command is completed with no error,
the content of next valid entry from the Read Pointer of the address book will be stored into the
Data registers. The MAC address will be stored into DataReg5 – DataReg0, with DataReg5
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