t3
t4
nALF
PD<7:0>
t2
t1
t7
t8
nSTROBE
BUSY
t6
t5
t6
FIGURE 23 - ECP PARALLEL PORT FORWARD TIMING
NAME
DESCRIPTION
nALF Valid to nSTROBE Asserted
PDATA Valid to nSTROBE Asserted
BUSY Deasserted to nALF Changed
(Notes 1,2)
MIN
0
0
TYP
MAX
60
60
UNITS
ns
ns
t1
t2
t3
80
180
ns
t4
t5
t6
t7
t8
BUSY Deasserted to PDATA Changed (Notes 1,2)
nSTROBE Asserted to Busy Asserted
nSTROBE Deasserted to Busy Deasserted
BUSY Deasserted to nSTROBE Asserted (Notes 1,2)
BUSY Asserted to nSTROBE Deasserted (Note 2)
80
0
0
80
80
180
ns
ns
ns
ns
ns
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.
Page 173
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