PRIXP425ABD Intel, PRIXP425ABD Datasheet - Page 118

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PRIXP425ABD

Manufacturer Part Number
PRIXP425ABD
Description
Manufacturer
Intel
Datasheet

Specifications of PRIXP425ABD

Core Operating Frequency
533MHz
Package Type
BGA
Pin Count
492
Mounting
Surface Mount
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Lead Free Status / Rohs Status
Compliant

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5.5.2.7.1
Figure 40.
Intel
Datasheet
118
Note:
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Notice that the access is an Intel-style simplex read access. The data strobe phase is set to a value to last three clock
cycles. The data is returned from the peripheral device prior to the three clocks and the peripheral device de-asserts
EX_IOWAIT_N. The data strobe phase terminates after two clocks even though the strobe phase was configured to pulse
for three clocks.
EX_ADDR[23:0]
EX_DATA[15:0]
EX_ IOWAIT_N
EX_CS_ N[0]
EX_RD_N
EX_IOWAIT_N
I/O Wait Normal Phase Timing
The EX_IOWAIT_N signal is available to be shared by devices attached to chip selects 0
through 7, when configured in Intel or Motorola modes of operation. The main purpose
of this signal is to properly communicate with slower devices requiring more time to
respond during data access. During idle cycles, the board is responsible for ensuring
that EX_IOWAIT_N is pulled-up. The Expansion bus controller will always ignore
EX_IOWAIT_N for synchronous Intel mode writes.
Refer to the Using I/O Wait sub-section in the Expansion Bus Controller chapter of the
Intel
Processor Developer’s Manual for detailed information.
EX_ CLK
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane
T1=0 h
1 Cycle
Intel
®
IXP42X product line and IXC1100 control plane processors—Datasheet
T2=0 h
1 Cycle
Valid Address
T3=2h or 1h or 0h
Valid Data
3 Cycles
2 Cycles
T4=0 h
1 Cycle
Document Number:
T5=0 h
1 Cycle
B5242 -01
252479-007US
June 2007

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