5 jtag clock, 6 i2c clock, 7 led clock – Intel IXF1104 User Manual
Page 129: 5 jtag clock 5.12.6 i
Intel
®
IXF1104 4-Port Gigabit Ethernet Media Access Controller
129
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
•
43/57 duty cycle for 18 MHz operation
5.12.5
JTAG Clock
The IXF1104 MAC supports JTAG. The source of this clock must meet the following
specifications:
•
2.5 V CMOS drive
•
Maximum clock frequency 11 MHz
•
Maximum duty cycle distortion 40/60
5.12.6
I
2
C Clock
The IXF1104 MAC supports a single-output I
2
C clock to support all ten Optical Module interfaces.
The IXF1104 MAC meets the following specifications for this clock:
•
2.5 V CMOS drive
•
Maximum clock frequency of 100 KHz
5.12.7
LED Clock
The IXF1104 MAC supports a serial LED data stream and meets the following specifications for
this clock:
•
2.5 V CMOS drive
•
Maximum frequency of 720 Hz
•
Maximum duty cycle distortion 50/50