IXP45X datasheet(131/148 Pages) INTEL

131 / 148 page

Intel® IXP45X and Intel® IXP46X Product Line of Network Processors

August 2006

Datasheet

Document Number: 306261-004US

131

Datasheet—Intel® IXP45X and Intel® IXP46X Product Line of Network Processors

Table 69.

Motorola* Simplex Mode Values

Symbol

Parameter

Min.

Max.

Units

Notes

Tad2valcs

Valid address to valid chip select

Cycles

1, 2, 7

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

14.7

Trdhold

Data hold required after the rising edge of EXP_MOT_DS_N

Trecov

Time required between successive accesses on the

expansion interface.

116

Cycles

Notes:

EX_ALE is not valid in simplex mode of operation.

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.

T is the period of the clock measured in ns.

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

synchronous mode.

Timing was designed for a system load between 5pF and 60pF for high drive setting

Figure 37.

HPI*–8 Mode Write Accesses

EX_ADDR[2:1]

(hcntl)

EX_ADDR[0]

(hbil)

EX_RDY_N

(hrdy)

Data

EX_DATA

(hdin)

EX_CS_N

(hcs_n)

EX_WR_N

(hds1_n)

EX_RD_N

(hr_w_n)

Valid

Data

Valid

EX_CLK

Tadd_setup

Tcs2hds1val

Thds1_pulse

Tdata_setup

Tdata_hold

Trecov

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