參數(shù)資料
型號: 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
文件頁數(shù): 53/74頁
文件大小: 1061K
代理商: LXT970A
Dual-Speed Fast Ethernet Transceiver
LXT970A
Datasheet
53
Figure 24. MII - 100BASE-TX Receive Timing / 5B Mode
Table 33. MII - 100BASE-TX Receive Timing Parameters / 5B Mode
Parameter
Sym
Min
Typ
1
Max
Units
3
RXD, RX_DV, RX_ER Setup to RX_CLK High
t3A
10
ns
RXD, RX_DV, RX_ER Hold from RX_CLK High
t3B
10
ns
CRS asserted to RX_DV asserted
t3C
8
BT
CRS asserted to RXD<4:0> asserted
t3D
4
BT
Receive start of
J
to CRS asserted
t3E
0
15 - 19
20
BT
Receive start of
T
to CRS de-asserted
t3F
13
23 - 27
28
BT
Receive start of
J
to COL asserted
t3G
0
15 - 19
20
BT
Receive start of
T
to COL de-asserted
t3H
13
23 - 27
28
BT
TRSTE asserted to RX_DV, RXD<4:0> driven
2
t3I
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.
Note
2
t3E
t3F
t3C
t3I
1
t3D
t3G
t3H
0ns
250ns
TPIP
CRS
TRSTE
1
RX_DV
RXD<4:0>
RX_CLK
COL
t3A
t3B
1. This parameter applies 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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