參數(shù)資料
型號(hào): 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): 68/109頁
文件大小: 815K
代理商: L64381
4-12
L64381 Operation
Figure 4.8
Writing Packets to the
L64381 with Port 1
Operation Aborted
If the L64381 detects the assertion of the ABORT_IN signal while a bus
write is in progress, then it restores the Transmit FIFO Tail Pointer to the
value it contained just before the transfer was started. ABORT_IN should
be asserted so that it is latched at one of the clock edges in which the
L64381 latches data from the data bus. It is ignored if asserted after the
assertion of EOP. ABORT_IN is asserted for one cycle only. When
ABORT_IN is asserted, the WRITE_IN_PKT can be terminated at the
same time. Figure 4.8 shows the ABORT_IN assertion for Port 1 write
operation, which has no effect on the following Port 2 operation.
CLOCK
BYTE_VALID[3:0]
SOP
DATA[31:0]
PORT_NO[1:0]
WRITE_IN_PKT
EOP
STROBE
BUF_AVAIL
00
2
PORT PORT PORT PORT
0
1
2
3
01
2
PORT_BUSY
ABORT_IN
PORT PORT PORT PORT
0
1
2
3
0000
2
0000
2
AI_FCS_IN
10
2
0000
2
D
D
D
D
D
D
1. Valid values for BYTE_VALID[3:0] are 0000
2
, 0001
2
, 0011
2
, 0111
2
, 1000
2
, 1100
2
and
1110
2
.
BV
1
BV
1
D
D
D
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