FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 128

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

When writing to the command and data port
with hardware speedup, the IOW timing shown
in the figure titled “IOW Timing for Port 92” in
the Timing Diagrams Section is used. This
nIOW+n60=B
60=I/O Addr
64=I/O Addr
nAfterD1+B
nIOW+n64
nAfterD1
AfterD1
nCNTL
nIOW'
nAEN
nIOW
nDD1
GA20
AEN
DD1
CLK
D[1]
n64
n60
nA
0ns
Gate A20 Turn-On Sequence Timing
250ns
128
setup time is only required to be met when using
hardware speedup; the data must be valid a
minimum of 0 nsec from the leading edge of the
write and held throughout the entire write cycle.
500ns