參數(shù)資料
型號: L64381
廠商: LSI Corporation
英文描述: 4-Port Ethernet Controller(四端口以太網(wǎng)控制器)
中文描述: 4端口以太網(wǎng)控制器(四端口以太網(wǎng)控制器)
文件頁數(shù): 67/109頁
文件大?。?/td> 815K
代理商: L64381
Bus Interface
4-11
Figure 4.7
STROBE to
BUF_AVAIL Timing
When the Bus-In State Machine receives a WRITE_IN_PKT signal and
its corresponding port number is on the PORT_NO[1:0] inputs, it writes
the DATA[31:0] along with the encoded BYTE_VALID[3:0], SOP, and
EOP signals into the Transmit FIFO using the tail pointer (refer to
Chapter 2, “Registers,” for more information on the tail pointer). If the
state machine detects either an asserted EOP or a deasserted
WRITE_IN_PKT signal on its input, it stops writing any more data into
the Transmit FIFO after that cycle.
Figure 4.8 shows the details of the handshaking during a bus write.
There should be at least one wait cycle between two consecutive bus
writes.
STROBE
PORT0
PKT_AVAIL
PORT1 PORT2 PORT3
CLOCK
BUF_AVAIL
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