gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 104
gwixp425bdt
Manufacturer Part Number
gwixp425bdt
Description
Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
Manufacturer
Intel Corporation
Datasheet
1.GWIXP425BDT.pdf
(134 pages)
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Intel
Table 54.
March 2005
104
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Intel
Talepulse
Tale2addrhold
Tdval2valwrt
Twrpulse
Tdholdafterwr
Tale2valcs
Trdsetup
Trdhold
Trecov
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Symbol
®
Multiplexed Mode Values
The EX_ALE signal is extended from 1 to 4 cycles based on the programming of the T1 timing
parameter. The parameter Tale2addrhold is fixed at 1 cycle.
Setting the address phase parameter (T1) will adjust the duration that the address appears to the external
device.
Setting the data setup phase parameter (T2) will adjust the duration that the data appears prior to a data
strobe (read or write) to an external device.
Setting the data strobe phase parameter (T3) will adjust the duration that the data strobe appears (read
or write) to an external device. Data will be available during this time as well.
Setting the data hold strobe phase parameter (T4) will adjust the duration that the chip selects, address,
and data (during a write) will be held.
Setting the recovery phase parameter (T5) will adjust the duration between successive accesses on the
expansion interface.
One cycle is the period of the Expansion Bus clock.
Clock to output delay for all signals will be a maximum of 15 ns for devices requiring operation in
synchronous mode.
Timing tests were performed with a 70-pF capacitor to ground.
Pulse width of EX_ALE (ADDR is valid at the rising edge of
EX_ALE)
Valid address hold time after from falling edge of EX_ALE
Write data valid prior to EX_WR_N falling edge
Pulse width of the EX_WR_N
Valid data after the rising edge of EX_WR_N
Valid chip select after the falling edge of EX_ALE
Data valid required before the rising edge of EX_RD_N
Data hold required after the rising edge of EX_RD_N
Time needed between successive accesses on expansion
interface.
Document Number: 252479, Revision: 005
Parameter
Min.
15
1
1
1
1
1
1
0
1
Max.
41
16
16
1
4
4
4
Cycles
Cycles 1, 2,
Cycles
Cycles
Cycles
Cycles
Cycles
Units
ns
ns
Datasheet
Notes
1,
3,
4,
5,
7
6
7
7
7
7
7
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