
3
Hardware Reference
32
PS/2 mouse and keyboard
With the Winbond® W83627DHG Super I/O controller, the Q35 motherboards support the PS/
2 keyboard and mouse interfaces on the rear I/O panel.
Mouse and keyboard features include:
8042-based keyboard controller with support for PS/2 mouse and keyboard
Fast Gate A20 and hardware keyboard reset
User options for the clock frequency of 6, 8, 12, and 16MHz via the BIOS setup utility
configuration.
Super I/O
The Winbond W83627EHG Super I/O controllers is capable of supporting a wide range of I/O
functions with the LPC (Low Pin Count) interface. The Q35 motherboards support the following
legacy devices via this super I/O chip:
UART ports (
page 31
)
PS/2 mouse and keyboard (
page 32
)
Note:
Though the W83627EHG super I/O chip is capable of supporting 40 GPIO lines by itself,
these GPIO lines are unavailable on the Q35 motherboards.
Expansion interfaces
IDE
The Q35 motherboard provide a standrd IDE connector to support IDE hard disks and ATAPI
devices via the ICH9‘s PCI controller.
PCI
PCI slots are compliant with the
PCI Local Bus Specification Version 2.3
. The PL35Q
motherboard has one 32-bit, 33MHz, 3.3V PCI slot.
PCI Express
All PCI Express interfaces on the PL35Q motherboard are compliant with the
PCI Express Base
Specification Version 1.1
.
One PCI Express x16 graphics interface
One PCI Express x4 interface
One PCI Express x1 interface.
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