t20
AX
t15
t22
t19
t11
nIOR
t13
t12
SD<7:0>
t8
t3
t10
IOCHRDY
nWRITE
t4
t5
PD<7:0>
t23
nDATASTB
t2
nADDRSTB
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 Asserted
nWAIT Deasserted to nIOCHRDY Deasserted
nIOCHRDY Deasserted to nIOR Deasserted
nIOR Deasserted to SDATA High-Z (Hold Time)
PData Valid to SDATA Valid
Time Out
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
t2
t3
t4
t5
50
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
0
0
0
t8
24
50
t10
t11
t12
t13
t15
t19
t20
t21
t22
t23
0
0
40
40
12
10
40
10
0
40
55
NOTE:
1. nWRITE is controlled by setting the PDIR bit to "1" in the control register before
performing an EPP Read.
FIGURE 19 - EPP 1.7 DATA OR ADDRESS READ CYCLE
SMSC DS – FDC37N769
Page 131 of 137
Rev. 02-16-07
DATASHEET
SMSC [ SMSC CORPORATION ]
