t20
t12
AX
t15
t22
t19
t11
nIOR
t13
SD<7:0>
t8
t3
t10
IOCHRDY
nWRITE
t4
t5
PD<7:0>
t23
nDATASTB
nADDRSTB
t2
t21
nWAIT
Parameter
min
max
units
Notes
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 Deasserted
nWAIT Deasserted to IOCHRDY Asserted
nIOCHRDY Deasserted to nIOR Asserted
nIOR Deasserted to SDATA High-Z (Hold Time)
PData Valid to SDATA Valid
t2
50
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
t3
0
0
0
t4
t5
t8
24
50
t10
t11
t12
t13
t15
t19
t20
t21
t22
t23
0
0
40
40
12
Time Out
10
40
10
0
Ax Valid to nIOR Asserted
nIOR Deasserted to Ax Invalid
Command Deasserted to nWAIT Deasserted
nIOR Deasserted to nIOW or nIOR Asserted
nIOR Asserted to Command Asserted
40
55
NOTE:
1. nWRITE is controlled by setting the PDIR bit to "1" in the control register before
performing an EPP Read.
FIGURE 23 - EPP 1.7 DATA OR ADDRESS READ CYCLE
SMSC DS – FDC37N3869
Page 132
Rev. 10/25/2000
SMSC [ SMSC CORPORATION ]
