FIGURE 15B - EPP 1.7 DATA OR ADDRESS READ CYCLE PARAMETERS
NAME
t2
DESCRIPTION
nIOR Deasserted to Command Deasserted
nWAIT Asserted to IOCHRDY Deasserted
Command Deasserted to PDATA Hi-Z
Command Asserted to PDATA Valid
nIOR Asserted to IOCHRDY Asserted
nWAIT Deasserted to IOCHRDY Deasserted
IOCHRDY Deasserted to nIOR Deasserted
nIOR Deasserted to SDATA High-Z (Hold Time)
PDATA Valid to SDATA Valid
MIN
TYP
MAX
50
UNITS
ns
t3
0
0
0
40
ns
t4
ns
t5
ns
t8
24
50
ns
t10
t11
t12
t13
t15
t19
t20
t21
t22
t23
ns
0
0
ns
40
40
12
ns
ns
Time Out
10
40
10
0
ms
Ax Valid to nIOR Asserted
ns
nIOR Deasserted to Ax Invalid
ns
Command Deasserted to nWAIT Deasserted
nIOR Deasserted to nIOW or nIOR Asserted
nIOR Asserted to Command Asserted
ns
40
ns
55
ns
Note:
WRITE is controlled by setting the PDIR bit to "1" in the control register before performing an
EPP Read.
185
SMSC [ SMSC CORPORATION ]
