lxt9785 Intel Corporation, lxt9785 Datasheet - Page 186

• Manufacturer Part Number: lxt9785
• Description: Advanced 8-port 10/100 Mbps Phy Transceivers
• Manufacturer: Intel Corporation

LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
188
Figure 49. Intel
Table 70. Intel
REFCLK rising edge to RxCLK rising
edge
RxData/RxSYNC output delay from
RxCLK rising edge
RxData/RxSYNC Rise/Fall time
Receive Start-of-Frame to CRS asserted
Receive Start-of-Idle to CRS de-asserted
NOTE: The table latency values are derived with the hardware configuration pins FIFOSEL[1:0] set at a
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
2. Assumes each SMII segment is sampled for CRS.
3. “BT” signifies bit times at the line rate (that is, BT = 100 ns if using 10BASE-T, BT = 10 ns if using
testing.
100BASE-TX or 100BASE-FX).
®
®
LXT9785/LXT9785E SS-SMII - 10BASE-T Receive Timing Parameters
LXT9785/LXT9785E SS-SMII - 10BASE-T Receive Timing
default configuration of 00 (32 bits of initial fill).
REFCLK
RxSYNC
RxData
RxCLK
Parameter
TPFI
t
4
Sym
t
1
t1
t2
t3
t4
t5
t
2
Min
1.5
–
–
–
–
Typ
1.5
10
18
–
1
1
Max
t
21
3
11
–
5
–
Units
BT
BT
ns
ns
ns
3
3
Revision Date: August 28, 2003
t
5
Minimum C
Maximum C
Synchronous sampling of
SMII
Synchronous sampling of
SMII
Document Number: 249241
Test Conditions
2
2
Revision Number: 007
L
L
–
–
= 5pF
Datasheet
= 40pF