1893CFLFT IDT, 1893CFLFT Datasheet - Page 115

• Manufacturer Part Number: 1893CFLFT
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT

Specifications of 1893CFLFT

• Rohs: yes
• Part # Aliases: ICS1893CFLFT

9.5.17 10Base-T: Heartbeat Timing (SQE)
ICS1893CK-40, Rev. C, 06/02/09
Table 9-24
The time periods consist of timings of signals on the following pins:
•
•
•
Figure 9-18
Note:
1. For more information on 10Base-T SQE operations, see
2. In 10Base-T mode, one bit time = 100 ns.
Table 9-24. 10Base-T Heartbeat (SQE) Timing
Figure 9-18. 10Base-T Heartbeat (SQE) Timing Diagram
TXEN
TXCLK
COL
Period
Time
TXEN
TXCLK
COL
t1
t2
Test”.
ICS1893CK-40 Data Sheet Rev. C - Release
COL Heartbeat Assertion Delay from
TXEN De-Assertion
COL Heartbeat Assertion Duration
lists the significant time periods for the 10Base-T heartbeat (that is, the Signal Quality Error).
shows the timing diagram for the time periods.
Parameter
Copyright © 2009, Integrated Device Technology, Inc.
t1
All rights reserved.
115
10Base-T Half Duplex
10Base-T Half Duplex
Conditions
Section 6.5.10, “10Base-T Operation: SQE
t2
Chapter 9 DC and AC Operating Conditions
Min.
–
–
1000
Typ.
850
Max.
1500
1500
June 2009
Units
ns
ns