
166
FIGURE 13B - EPP 1.9 DATA OR ADDRESS READ CYCLE TIMING PARAMETERS
NAME
DESCRIPTION
MIN
TYP
MAX
UNITS
t1
PDATA Hi-Z to Command Asserted
0
30
ns
t2
nIOR Asserted to PDATA Hi-Z
0
50
ns
t3
nWAIT Deasserted to Command Deasserted
(Note 1)
60
180
ns
t4
Command Deasserted to PDATA Hi-Z
0
ns
t5
Command Asserted to PDATA Valid
0
ns
t6
PDATA Hi-Z to nWAIT Deasserted
0
s
t7
PDATA Valid to nWAIT Deasserted
0
ns
t8
nIOR Asserted to IOCHRDY Asserted
0
24
ns
t9
nWRITE Deasserted to nIOR Asserted (Note 2)
0
ns
t10
nWAIT Deasserted to IOCHRDY Deasserted
(Note 1)
60
160
ns
t11
IOCHRDY Deasserted to nIOR Deasserted
0
ns
t12
nIOR Deasserted to SDATA Hi-Z (Hold Time)
0
40
ns
t13
PDATA Valid to SDATA Valid
0
75
ns
t14
nWAIT Asserted to Command Asserted
0
195
ns
t15
Time Out
10
12
s
t16
nWAIT Deasserted to PDATA Driven (Note 1)
60
190
ns
t17
nWAIT Deasserted to nWRITE Modified (Notes 1,2)
60
190
ns
t18
SDATA Valid to IOCHRDY Deasserted (Note 3)
0
85
ns
t19
Ax Valid to nIOR Asserted
40
ns
t20
nIOR Deasserted to Ax Invalid
10
ns
t21
nWAIT Asserted to nWRITE Deasserted
0
185
ns
t22
nIOR Deasserted to nIOW or nIOR Asserted
40
ns
t23
nWAIT Asserted to PDIR Set (Note 1)
60
185
ns
t24
PDATA Hi-Z to PDIR Set
0
ns
t25
nWAIT Asserted to PDATA Hi-Z (Note 1)
60
180
ns
t26
PDIR Set to Command
0
20
ns
t27
nWAIT Deasserted to PDIR Low (Note 1)
60
180
ns
t28
nWRITE Deasserted to Command
1
ns
Note 1:
nWAIT is considered to have settled after it does not transition for a minimum of 50 ns.
Note 2:
When not executing a write cycle, EPP nWRITE is inactive high.
Note 3:
85 is true only if t7 = 0.