PC87332VLJ-5 NSC [National Semiconductor], PC87332VLJ-5 Datasheet - Page 96

• Manufacturer Part Number: PC87332VLJ-5
• Description: PC87332VLJ (3.3V/5V) and PC87332VLJ-5 (5V) (SuperI/OTM III Premium Green) Floppy Disk Controller, Dual UARTs, IEEE1284 Parallel Port, and IDE Interfac
• Manufacturer: NSC [National Semiconductor]

9 0 Electrical Characteristics
9 3 15 Enhanced Parallel Port Timing
Note 1 t
Note 2 The PC87334 design guarantees that WRITE will not change from low to high before DSTRB or ASTRB goes from low to high
Note 3 In EPP 1 9 IOCHRDY is measured from WR or RD
Symbol
t
t
t
t
t
t
t
t
t
t
WW
WST
WEST
WPDh
HRW
WPDS
EPDW
EPDh
ZWSa
ZWSh
WST
and t
WW
WRITE Active from WR Active (Note 1)
DSTRB or ASTRB Active from
WR Active (Notes 1 2)
DSTRB or ASTRB Active after
WRITE Active
PD0–7 Hold after DSTRB or ASTRB Inactive
IOCHRDY Active after WAIT Active
(Note 3)
PD0–7 Valid after WRITE Active
PD0–7 Valid
PD0–7 Invalid after DSTRB or ASTRB Inactive
ZWS Valid after WR or RD Active
ZWS Hold after WR or RD Inactive
are valid in EPP 1 9 only if WAIT is low when WR becomes active else t
Parameter
FIGURE 9-17 Enhanced Parallel Port Timing
(Continued)
96
D0– 7 is Stable 15 ns
before WR Active
Conditions
EPP 1 7
EPP 1 9
EPP 1 7
EPP 1 9
EPP 1 7
WST
and t
WW
are measured from WAIT
Min
10
50
80
0
0
0
Max
45
45
65
40
15
45
TL C 11930 – 42
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns