| 摘要 |
PURPOSE: A VOQ(Virtual Output Queue) block circuit for supporting the read and write of variable length packet data is provided to variably manage data by a value set in a CNT field of a point queue by inserting the CNT field of the point queue. CONSTITUTION: A memory(27) stores inputted packet data. A free address queue(28) stores pointers, indicating addresses of an empty memory, as a connection list type. The free address queue(28) has a next field(29) and an address field(30). The next field(29) of the free address queue(28) stores addresses of the free address queue(28) having addresses of a next empty memory. The address field(30) of the free address queue(28) manages addresses of a memory capable of writing data. A point queue(31) stores pointers, indicating addresses of a memory which stores data, as a connection list type. The point queue(31) has an address field(32), a CNT field(33), and a next field(34). The address field(32) stores the addresses of the memory which stores the data. The CNT field(33) stores the number of the data stored in the memory. The next field(34) stores addresses of the point queue(31) having the addresses of the memory.
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