FDC37C935-QS Standard Microsystems (SMSC), FDC37C935-QS Datasheet - Page 122

• Manufacturer Part Number: FDC37C935-QS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C935-QS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

The FDC37C93x is a Super I/O, Real Time
Clock and Universal Keyboard Controller that is
designed for intelligent keyboard management
in desktop computer applications. The Super
I/O supports a Floppy Disk Controller, two
16550 type serial ports, one ECP/EPP Parallel
Port and two IDE drive interfaces with support
for four drives.
KIRQ is the Keyboard IRQ
MIRQ is the Mouse IRQ
GP25 - Port 21 is GP25's alternate function output, and can be used to create a GATEA20 signal from
the FDC37C93x
GP20 - This General purpose output can be configured as the 8042 Port 2.0 which is typically used to
create a "keyboard reset" signal. The 8042's P20 can be used to optionally reset the Watch Dog
Timer.
8042A
8042 KEYBOARD CONTROLLER AND REAL TIME CLOCK FUNCTIONAL
TST0
TST1
P27
P10
P26
P23
P24
P25
P21
P20
P22
P11
Keyboard and Mouse Interface
DESCRIPTION
LS05
122
The Universal Keyboard Controller uses an
8042 microcontroller CPU core.
concentrates on the FDC37C93x enhancements
to the 8042. For general information about the
8042, refer to the "Hardware Description of the
8042" in the 8-Bit Embedded Controller Hand-
book.
KIRQ
MIRQ
GP25
GP20 (WD Timer)
KDAT
KCLK
MCLK
MDAT
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