FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 187

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

Output Drivers
To facilitate higher performance data transfer,
the use of balanced CMOS active drivers for
critical
PeriphAck, PeriphClk) are used ECP Mode.
Because the use of active drivers can present
compatibility
Mode (the control signals, by tradition, are
Note 1: The data is held until BUSY goes inactive or for time t3, whichever is longer. This only
NAME
nSTROBE
t1
t2
t3
t4
t5
t6
PDATA
BUSY
applies if another data transfer is pending. If no other data transfer is pending, the data is
held indefinitely.
signals
DATA Valid to nSTROBE Active
nSTROBE Active Pulse Width
DATA Hold from nSTROBE Inactive (Note 1)
nSTROBE Active to BUSY Active
BUSY Inactive to nSTROBE Active
BUSY Inactive to PDATA Invalid (Note 1)
problems
(Data,
FIGURE 16 - PARALLEL PORT FIFO TIMING
HostAck,
DESCRIPTION
in Compatible
HostClk,
t1
187
specified
dynamically changed from open-collector to
totem-pole. The timing for the dynamic driver
change is specified in
Extended Capabilities Port Protocol and ISA
Interface Standard, Rev. 1.14, July 14, 1993,
available from Microsoft. The dynamic driver
change must be implemented properly to
prevent glitching the outputs.
t4
t2
as open-collector), the drivers are
MIN
600
600
450
680
80
t3
TYP
then
t6
MAX
t5
500
IEEE
UNITS
ns
ns
ns
ns
ns
ns
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