ICS1893 Integrated Circuit Systems, ICS1893 Datasheet - Page 142

• Manufacturer Part Number: ICS1893
• Description: 3.3-V 10Base-T/100Base-TX Integrated PHYceiver
• Manufacturer: Integrated Circuit Systems

10.5.16 100M Media Dependent Interface: Input-to-Carrier Assertion/De-Assertion
ICS1893 Rev C 6/6/00
TP_RX
CRS
COL
†
unscrambled.
Table 10-23
time periods consist of timings of signals on the following pins:
•
•
•
Figure 10-17
Table 10-23. 100M MDI Input-to-Carrier Assertion/De-Assertion Timing
† The IEEE maximum is 20 bit times.
‡ The IEEE minimum is 13 bit times, and the maximum is 24 bit times.
Figure 10-17. 100M MDI Input to Carrier Assertion / De-Assertion Timing Diagram
Shown
Period
†
Time
TP_RX (that is, TP_RXP and TP_RXN)
CRS
COL
t1
t2
t3
t4
ICS1893 Data Sheet - Release
First Bit of /J/ into TP_RX to CRS Assert †
First Bit of /J/ into TP_RX while
Transmitting Data to COL Assert †
First Bit of /T/ into TP_RX to CRS
De-Assert ‡
First Bit of /T/ Received into TP_RX to
COL De-Assert ‡
lists the significant time periods for the 100M MDI input-to-carrier assertion/de-assertion. The
shows the timing diagram for the time periods.
First bit
t2
t1
Parameter
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
142
Half-Duplex Mode
Half-Duplex Mode
Conditions
–
–
Chapter 10 DC and AC Operating Conditions
First bit of /T/
t3
t4
Min.
10
13
13
9
Typ.
–
–
–
–
Max.
14
13
18
18
June, 2000
Bit times
Bit times
Bit times
Bit times
Units