IXP45X Datasheet, PDF (130/148 Pages) Intel Corporation – Product Line of Network Processors

Intel^® IXP45X and Intel^® IXP46X Product Line of Network Processors—Datasheet
Table 68.
Motorola* Multiplexed Mode Values (Sheet 2 of 2)
Symbol
Parameter
Min. Max. Units
Notes
T_ale2valcs
T_rdsetup
Valid chip select after the falling edge of ALE
Data valid required before the rising edge of
EXP_MOT_DS_N
1
4
14.7
Cycles 7
ns
T_rdhold
T_recov
Data hold required after the rising edge of EXP_MOT_DS_N 2
Time needed between successive accesses on expansion
interface.
1
ns
16 Cycles 6
Notes:
1.
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.
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.
T is the period of the clock measured in ns.
8.
Clock to output delay for all signals will be a maximum of 15 ns for devices requiring operation in
synchronous mode.
9.
Timing was designed for a system load between 5pF and 60pF for high drive setting
Figure 36. Motorola* Simplex Mode
EX_CLK
EX_CS_N
EX_ADDR
EX_RD_N
(exp_mot_rnw)
EX_WR_N
(exp_mot_ds_n)
EX_DATA
EX_RD_N
(exp_mot_rnw)
EX_WR_N
(exp_mot_ds_n)
EX_DATA
T1
1-4 Cycles
T2
1-4 Cycles
T3
1-16 Cycles
T4
1-4 Cycles
T5
1-16 Cycles
Tad2valcs
Trecov
Valid Address
Tdhold2afterds
Tdspulse
Tdval2valds
Output Data
Trdsetup
Trdhold
Input Data
A9588-01
Intel^® IXP45X and Intel^® IXP46X Product Line of Network Processors
Datasheet
130
August 2006
Document Number: 306261-004US