FIGURE 14B - EPP 1.7 DATA OR ADDRESS WRITE CYCLE PARAMETERS
NAME
t1
DESCRIPTION
nIOW Asserted to PDATA Valid
MIN
0
TYP
MAX
50
UNITS
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
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
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
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.
183
SMSC [ SMSC CORPORATION ]
