µPD31172
(e) Write timing in EPP1.9 mode
Parameter
IOCHRDY setup time
Symbol
Conditions
MIN.
MAX.
3 T
Unit
ns
t22
t23
t24
CD (7:0) output delay time
30
ns
STROBE# setup time, DIR1284 cancellation time
5 T
ns
(from IOW# ↓)
STROBE# setup time, DIR1284 cancellation time
t25
4 T
ns
ns
(from BUSY ↓)
SELECTIN#, AUTOFEED# setup time
t26
0
(from STROBE# ↓, valid data output)
Timeout generation time
t27
t28
10
µs
SELECTIN#, AUTOFEED# cancellation time
3 T
ns
(from IOW# ↑)
IOCHRDY cancellation time
t29
t30
t31
4 T
ns
ns
ns
CD (7:0) hold time
1 T
1 T
STROBE# cancellation time, DIR1284 setup time
Remark T: Parallel interface internal clock cycle (41.6 ns (MIN.))
AD (24:0),
Valid data
DATA (31:0)
(input)
t27
IOW# (input)
t
22
t
29
IOCHRDY
(output)
t
24
t
31
STROBE#
(output)
t
26
t
28
SELECTIN#
AUTOFEED#
(output)
t
t
23
24
t
t
30
31
CD (7:0)
(output)
Valid data
DIR1284
(output)
t
25
BUSY
(input)
32
Data Sheet U14388EJ2V0DS00
NEC [ NEC ]
