ICS1893CFILF View Datasheet(PDF) - Integrated Circuit Systems
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Description
MFG CO.
'ICS1893CFILF' PDF : 126 Pages View PDF
ICS1893CF Data Sheet Rev. F - Release
Chapter 9 DC and AC Operating Conditions
9.5.17 10Base-T: Heartbeat Timing (SQE)
Table 9-24 lists the significant time periods for the 10Base-T heartbeat (that is, the Signal Quality Error).
The time periods consist of timings of signals on the following pins:
• TXEN
• TXCLK
• COL
Figure 9-18 shows the timing diagram for the time periods.
Note:
1. For more information on 10Base-T SQE operations, see Section 6.5.10, “10Base-T Operation: SQE
Test”.
2. In 10Base-T mode, one bit time = 100 ns.
Table 9-24. 10Base-T Heartbeat (SQE) Timing
Time
Period
Parameter
t1 COL Heartbeat Assertion Delay from
TXEN De-Assertion
t2 COL Heartbeat Assertion Duration
Conditions
Min.
10Base-T Half Duplex –
10Base-T Half Duplex –
Typ.
850
1000
Max.
1500
1500
Units
ns
ns
Figure 9-18. 10Base-T Heartbeat (SQE) Timing Diagram
TXEN
TXCLK
COL
t1
t2
ICS1893CF, Rev. F, 03/01/07
Copyright © 2007, Integrated Device Technology, Inc.
All rights reserved.
119
Mar. 2007
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