IXP45X INTEL [Intel Corporation], IXP45X Datasheet - Page 133
IXP45X
Manufacturer Part Number
IXP45X
Description
Product Line of Network Processors
Manufacturer
INTEL [Intel Corporation]
Datasheet
1.IXP45X.pdf
(148 pages)
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Datasheet—Intel
Table 72.
Table 73.
August 2006
Document Number:
Setup/Hold Timing Values in Asynchronous Mode of Operation
HPI*-16 Multiplexed Write Accesses Values
®
Output Valid after rising edge of EX_CLK
Output Hold after rising edge of EX_CLK
Input Setup prior to rising edge of EX_CLK
Input Hold required after rising edge of EX_CLK
Notes:
1.
Notes:
1.
2.
3.
4.
5.
6.
7.
306261-004US
IXP45X and Intel
T
T
T
T
T
Symbol
cs2hds1val
hds1_pulse
data_setup
add_setup
data_hold
T
recov
The Setup and Hold Timing values are for all modes.
The address phase parameter (T1) must be set to a minimum value of 2. This value allows three T
clocks for the address phase. This setting is required to ensure that in the event of an HRDY, the
IXP45X/IXP46X network processors have had sufficient time to recognize the HRDY and hold the
address phase for at least one clock pulse after the HRDY is de-active.
The data setup phase parameter (T2) must be set to a minimum value of 2. This value allows three T
clocks for setup phase.
The data strobe phase parameter (T3) must be set to a minimum value of 1. This value allows two T
clocks for the data phase. This setting is required to ensure that in the event of an HRDY, the IXP45X/
IXP46X network processors have had sufficient time to recognize the HRDY and hold the data setup
phase for at least one clock pulse after the HRDY is de-active
Setting the recovery phase parameter (T5) will adjust the duration between successive accesses on
the Expansion Bus interface.
HRDY can be asserted by the DSP at any point in the access. The interface will not leave states T1 or
T3 until HRDY is de-active
One cycle is the period of the Expansion Bus clock.
Timing was designed for a system load between 5pF and 60pF for high drive setting
Valid time that address is asserted on the line. The address
is asserted at the same time as chip select.
Delay from chip select being active and the HDS1 data
strobe being active.
Pulse width of the HDS1 data strobe
Data valid prior to the rising edge of the HDS1 data strobe.
Data valid after the rising edge of the HDS1 data strobe.
Time required between successive accesses on the
expansion interface.
®
IXP46X Product Line of Network Processors
Parameter
Parameter
Intel
®
IXP45X and Intel
Min.
3.5
0.5
0
®
IXP46X Product Line of Network Processors
Max.
10
Units
ns
ns
ns
ns
Min.
11
3
4
4
4
2
1
1
1
1
Notes
Max.
45
36
17
4
5
5
Cycles
Cycles
Cycles
Cycles
Cycles
Cycles
Units
Datasheet
1, 5,
5,
2, 4,
3, 5,
3,
4,
Notes
6
6
6
133
6
5
6
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