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參數資料
型號: DJLXT972MQCA4
廠商: Intel Corp.
英文描述: Single-Port 10/100 Mbps PHY Transceiver
中文描述: 單端口10/100 Mbps的物理層收發器
文件頁數: 66/92頁
文件大小: 666K
代理商: DJLXT972MQCA4
Intel
LXT972M Single-Port 10/100 Mbps PHY Transceiver
66
Datasheet
Document Number: 302875-005
Revision Date: 27-Oct-2005
Figure 23
does not show the TX_ER signal.
.
Figure 23. Intel
LXT972M Transceiver 100BASE-TX Transmit Timing
t1
t2
t5
t3
t4
0ns
250ns
TXCLK
TX_EN
TXD[3:0]
TPO
CRS
B3454-03
Note: Timing diagram depicts 4B mode.
Table 31. Intel
LXT972M Transceiver 100BASE-TX Transmit Timing Parameters
Parameter
Symbol
Min
Typ
1
Max
Units
2
Test Conditions
TXD[3:0], TX_EN setup to TX_CLK
High
t1
12
ns
TXD[3:0], TX_EN hold from TX_CLK
High
t2
0
ns
TX_EN sampled to CRS asserted
t3
20
24
BT
TX_EN sampled to CRS de-asserted
t4
24
28
BT
TX_EN sampled to TPO out (Tx
latency)
t5
5.3
5.7
BT
1. Typical values are at 25 °C and are for design aid only, not guaranteed, and not subject to production
testing.
2. BT (Bit Time) is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit
rate. 100BASE-T bit time = 10
-8
s or 10 ns.
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