IXP45X datasheet(129/148 Pages) INTEL

129 / 148 page

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

August 2006

Datasheet

Document Number: 306261-004US

129

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

Figure 35.

Motorola* Multiplexed Mode

Table 68.

Motorola* Multiplexed Mode Values (Sheet 1 of 2)

Symbol

Parameter

Min.

Max. Units

Notes

Talepulse

Pulse width of ALE (ADDR is valid at the rising edge of ALE)

Cycles

1, 7

Tale2addrhold Valid address hold time after from falling edge of ALE

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

Notes:

The EX_ALE signal is extended form T to 4T nnsec, based on the programming of the T1 timing

parameter. The parameter Tale2addrhold is fixed at T.

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

A9587-01

EX_CLK

EX_ADDR

EX_DATA

EX_RD_N

(exp_mot_rnw)

EX_WR_N

(exp_mot_ds_n)

EX_DATA

EX_ALE

Valid Address

1-16 Cycles

1-4 Cycles

EX_CS_N

Trecov

Tale2addrhold

Tdval2valds

EX_WR_N

(exp_mot_ds_n)

EX_RD_N

(exp_mot_rnw)

Tdhold2afterds

1-16 Cycles

1-4 Cycles

2-5 Cycles

ALE Extended

Talepulse Tale2valcs

Tdspulse

Address

Output Data

Address

Input Data

Multiplexed Address/Data

Trdsetup

Trdhold

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