TABLE 104 - EPP 1.7 DATA OR ADDRESS WRITE CYCLE TIMING
NAME
t1
DESCRIPTION
MIN
TYP
MAX
UNITS
ns
ns
ns
ns
ns
s
nIOW Asserted to PDATA Valid
0
50
t2
Command Deasserted to nWRITE Change
nWRITE to Command
0
40
t3
5
35
t4
nIOW Deasserted to Command Deasserted (Note 2)
Command Deasserted to PDATA Invalid
Time Out
50
t5
50
10
10
0
t6
12
t8
SDATA Valid to nIOW Asserted
ns
ns
ns
ns
ns
ns
ns
ns
s
t9
nIOW Deasserted to DATA Invalid
nIOW Asserted to IOCHRDY Asserted
nWAIT Deasserted to IOCHRDY Deasserted
IOCHRDY Deasserted to nIOW Deasserted
nIOW Asserted to nWRITE Asserted
PDATA Valid to Command Asserted
Ax Valid to nIOW Asserted
t10
t11
t12
t13
t16
t17
t18
t19
t20
t21
0
24
40
10
0
50
35
10
40
10
100
nIOW Deasserted to Ax Invalid
nIOW Deasserted to nIOW or nIOR Asserted
nWAIT Asserted to IOCHRDY Deasserted
Command Deasserted to nWAIT Deasserted
ns
ns
ns
45
0
Note 1 nWRITE is controlled by clearing the PDIR bit to "0" in the control register before performing an
EPP Write.
Note 2 The number is only valid if nWAIT is active when IOW goes active.
245
SMSC [ SMSC CORPORATION ]
