TABLE 94 - EPP 1.7 DATA OR ADDRESS WRITE CYCLE TIMING
NAME
t1
t2
t3
t4
t5
t6
t8
t9
t10
t11
t12
t13
t16
t17
t18
t19
t20
t21
DESCRIPTION
nIOW Asserted to PDATA Valid
Command Deasserted to nWRITE Change
nWRITE to Command
nIOW Deasserted to Command Deasserted (Note 2)
Command Deasserted to PDATA Invalid
Time Out
MIN
0
0
TYP
MAX
50
40
35
50
UNITS
ns
ns
ns
ns
ns
μs
ns
ns
ns
ns
ns
ns
ns
ns
μs
ns
ns
ns
5
50
10
10
0
12
SDATA Valid to nIOW Asserted
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
0
24
40
10
0
10
40
10
100
50
35
nIOW Deasserted to Ax Invalid
nIOW Deasserted to nIOW or nIOR Asserted
nWAIT Asserted to IOCHRDY Deasserted
Command Deasserted to nWAIT Deasserted
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.
226
SMSC [ SMSC CORPORATION ]
