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): 63/109頁
文件大?。?/td> 815K
代理商: L64381
Bus Interface
4-7
Figure 4.4
Reading Packets from
the L64381
If the data being transferred on the bus is the start of a new packet, then
the state machine also asserts the SOP output (Port 0 in Figure 4.4).
Similarly, if the data being transmitted is the end of a packet, then the
state machine asserts the EOP signal (Port 1 in Figure 4.4). Note that
CLOCK
BYTE_VALID[3:0]
SOP
4
DATA[31:0]
4
PORT_NO[1:0]
READ_OUT_PKT
EOP
STROBE
PKT_AVAIL
00
2
PORT PORT PORT PORT
0
1
2
3
01
2
10
2
PORT_BUSY
ABORT_OUT
3
PORT PORT PORT PORT
0
1
2
3
0000
2
0000
2
D
D
D
D
D
D
D
D
BV
2
1. The first word contains the port ID# when SOPCFG bit 4 of Configuration Register 1
is set to 1.
2. Valid values for BYTE_VALID[3:0] are 0000
2
, 1000
2
, 1100
2
and 1110
2
.
3. When the L64381 detects dribble bits, it asserts ABORT_OUT and EOP with
BYTE_VALID[3:0] = 1111
2
4. SOPCFG, Bit 4 of Configuration Register 1 = 0
5. SOPCFG, Bit 4 of Configuration Register 1 = 1
SOP
5
DATA[31:0]
5
PID
1
D
D
D
D
D
D
D
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