PRIXP425BD datasheet(98/112 Pages) INTEL

98 / 112 page

Intel® IXP42X Product Line and IXC1100 Control Plane Processor

Electrical Specifications

Datasheet

NOTES:

1. EX_ALE is not valid in simplex mode of operation.

2. Setting the address phase parameter (T1) will adjust the duration that the address appears to the external device.

3. 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.

4. 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.

5. 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.

6. Setting the recovery phase parameter (T5) will adjust the duration between successive accesses on the

expansion interface.

7. One cycle is the period of the Expansion Bus clock.

8. Clock to output delay for all signals will be a maximum of 15 ns for devices requiring operation in

synchronous mode.

9. Timing tests were performed with a 70-pF capacitor to ground.

Table 55.

Motorola* Simplex Mode Values

Symbol

Parameter

Min.

Max.

Units

Note

Tad2valcs

Valid address to valid chip select

Cycles

1, 2,

Tdval2valds

Write data valid prior to EXP_MOT_DS_N falling edge

Cycles

3, 7

Tdspulse

Pulse width of the EXP_MOT_DS_N

Cycles

4, 7

Tdholdafterds

Valid data after the rising edge of EXP_MOT_DS_N

Cycles

5, 7

Trdsetup

Data valid required before the rising edge of

EXP_MOT_DS_N

5.3

14.7

Trdhold

Data hold required after the rising edge of

EXP_MOT_DS_N

2ns

Trecov

Time required between successive accesses on the

expansion interface.

116

Cycles

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