FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 158

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

compatibility problems in Compatible Mode (the
control signals, by
as open-collector), the drivers are dynamically
changed from open-collector to totem-pole. The
timing for the dynamic driver change is specified
nS T ROBE
PDATA
BUSY
1. The da ta i s h eld un ti l BUSY go es inactive or for ti me t3, whi ch ever is long er. Th is o nly
t1
t2
t3
t4
t5
t6
ap plie s i f ano th er data tra nsfer is pending. If no other data transfer is p end ing, th e data
is h eld i ndefin itely.
DATA Vali d to nSTROBE Active
nSTROBE Active Pulse Width
DATA Hold from nSTROBE Inactive
n STROBE Active to BUSY Active
BUSY In active to nSTROBE Active
BUSY In active to PDATE Invalid
tradition,
FIGURE 19 - PARALLEL PORT FIFO TIMING
Parameter
are
t 1
specified
158
t 4
in the IEEE 1284 Extended Capabilities
Protocol and ISA Interface Standard, Rev. 1.09,
Jan. 7, 1993, available from Microsoft.
dynamic driver change must be implemented
properly to prevent glitching the outputs.
t 2
min
6 00
6 00
4 50
6 80
80
max
5 00
t 3
t 6
units
ns
ns
ns
ns
ns
ns
t 5
Notes
1
1
Port
The