FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 137

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

programmed as input nor inverted through the
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
137
250ns
GP configuration registers.
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