參數(shù)資料
型號(hào): LXT970A
廠商: Intel Corp.
英文描述: Dual-Speed Fast Ethernet Transceiver
中文描述: 雙速度快速以太網(wǎng)收發(fā)器
文件頁(yè)數(shù): 57/74頁(yè)
文件大?。?/td> 1061K
代理商: LXT970A
Dual-Speed Fast Ethernet Transceiver
LXT970A
Datasheet
57
Figure 28. MII - 10BASE-T Receiving Timing
Table 37. MII - 10BASE-T Receive Timing Parameters
Parameter
Sym
Min
Typ
1
Max
Units
2
RXD, RX_DV, RX_ER Setup to RX_CLK High
t7A
10
ns
RXD, RX_DV, RX_ER Hold from RX_CLK High
t7B
10
ns
TPI in to RXD out (Rx latency)
t7C
73
3
BT
CRS asserted to RXD, RX_DV, RX_ER asserted
t7D
0
69
3
BT
RXD, RX_DV, RX_ER de-asserted to CRS de-asserted
t7E
0
2.5 - 5.5
6
BT
TPI in to CRS asserted
t7F
0
4
5
BT
TPI quiet to CRS de-asserted
t7G
0
18
19
BT
TPI in to COL asserted
t7H
0
4
5
BT
TPI quiet to COL de-asserted
t7I
0
18
19
BT
1. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
2. BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate. 10BASE-T bit time = 10
-
s or 100 ns.
3. CRS is asserted. RXD/RX_DV are driven at the start of SFD (64 BT).
RX_CLK
RXD,
RX_DV,
RX_ER
CRS
TPI
t7C
t
7D
t
7B
t
7F
t
7A
t
7G
t
7E
COL
t
7H
t7I
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