IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
7.2 I/O Timing
7.2.1 IBM Packet Routing Switch Serial Interface Converter A.C. Characteristics
7.2.1.1 AC parameters characteristics
The converter’s external interfaces (UTOPIA-3 like, Processor, and DASL) specify that all inputs and outputs
are registered. Only Set-up times and Hold times for inputs and Clock-to-outputs times for Outputs are
needed.
Figure 37: AC parameters timing diagram
tck
Clock
Input
Signal
V a l i d
tsu
tHOLD
tcTOV
Output
Signal
Valid
7.2.1.2 Protocol Engine (UTOPIA-3 like) Interface A.C. Specifications
Symbol
f
Parameter
clock frequency
clock period
Test condition
Min
50
8
Typical
110
9
Max
125
20
Unit
MHz
ns
tck
tpw
Clock Pulse Width
Clock-to-Output valid
Input Set-up Time
Input Hold Time
High or Low
xx pF, all outputs
All inputs
3.3
0.8
2
ns
tcTOV
tsu
5
ns
ns
tHOLD
All inputs
0
ns
I/O Definition and Package Pin Assignment
Page 124 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
