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): 55/74頁(yè)
文件大?。?/td> 1061K
代理商: LXT970A
Dual-Speed Fast Ethernet Transceiver
LXT970A
Datasheet
55
Figure 26. MII - 100BASE-FX Receive Timing / 4B Mode
Table 35. MII - 100BASE-FX Receive Timing Parameters / 4B Mode
Parameter
Sym
Min
Typ
1
Max
Units
3
RXD, RX_DV, RX_ER Setup to RX_CLK High
t5A
10
ns
RXD, RX_DV, RX_ER Hold from RX_CLK High
t5B
10
ns
CRS asserted to RXD<3:0>, RX_DV asserted
t5C
8
BT
Receive start of
J
to CRS asserted
t5D
0
13 - 17
20
BT
Receive start of
T
to CRS de-asserted
t5E
13
21 - 25
26
BT
Receive start of
J
to COL asserted
t5F
0
13 - 17
20
BT
Receive start of
T
to COL de-asserted
t5G
13
21 - 25
26
BT
TRSTE asserted to RX_DV, RXD<3:0> driven
2
t5H
20
ns
1. Typical values are at 25
°
C and are for design aid only; not guaranteed and not subject to production testing.
2. These parameters apply only when the device is operated in Repeater Mode.
3. BT 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
-
s or 10 ns.
t5H
1
t5D
t5E
t5C
t5F
t5G
0ns
250ns
CRS
TRSTE
1
RX_DV
RXD<3:0>
RX_CLK
COL
t5A
t5B
Note
2
FIBIP
1. These parameters apply only when the device is operated in Repeater Mode.
2. In Repeater Mode, application circuit must assert TRSTE within time period specified by t4 - t10.
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