t3
t4
nAUTOFD
PDATA<7:0>
t2
t1
t7
t8
nSTROBE
BUSY
t6
t5
t6
FIGURE 17 - ECP PARALLEL PORT FORWARD TIMING
NAME
DESCRIPTION
MIN
0
TYP
MAX
60
UNITS
ns
t1
t2
t3
nAUTOFD Valid to nSTROBE Asserted
PDATA Valid to nSTROBE Asserted
0
60
ns
BUSY Deasserted to nAUTOFD Changed
(Notes 1,2)
80
180
ns
t4
t5
t6
t7
t8
BUSY Deasserted to PDATA Changed (Notes 1,2)
nSTROBE Deasserted to Busy Asserted
80
0
180
ns
ns
ns
ns
ns
nSTROBE Deasserted to Busy Deasserted
0
BUSY Deasserted to nSTROBE Asserted (Notes 1,2)
BUSY Asserted to nSTROBE Deasserted (Note 2)
80
80
200
180
Note 1: Maximum value only applies if there is data in the FIFO waiting to be written out.
Note 2: BUSY is not considered asserted or deasserted until it is stable for a minimum of 75 to 130
ns.
188
SMSC [ SMSC CORPORATION ]
