Intel D865GRH D865GRH_TechProdSpec. - Page 40

I/O Controller

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Intel Desktop Board D865GRH Technical Product Specification 1.7.4.3 SCSI Hard Drive Activity LED Connector (Optional) The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in hard drive controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in hard drive controller. The LED indicates when data is being read from, or written to, either the add-in hard drive controller or the onboard IDE controller (Parallel ATA or Serial ATA). For information about The location of the SCSI hard drive activity LED connector on the D865GRH board The signal names of the SCSI hard drive activity LED connector Refer to Figure 19, page 79 Table 33, page 80 1.7.5 Real-Time Clock, CMOS SRAM, and Battery A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied. ✏ NOTE If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS RAM at power-on. 1.8 I/O Controller The I/O controller provides the following features: • One serial port • One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support • Serial IRQ interface compatible with serialized IRQ support for PCI systems • PS/2-style mouse and keyboard interfaces • Interface for one 1.44 MB or 2.88 MB diskette drive • Intelligent power management, including a programmable wake-up event interface • PCI power management support The BIOS Setup program provides configuration options for the I/O controller. For information about SMSC LPC47M172 I/O controller National Semiconductor PC87372 I/O Controller Refer to http://www.smsc.com/ http://www.national.com/ 40

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Intel Desktop Board D865GRH Technical Product Specification
40
1.7.4.3
SCSI Hard Drive Activity LED Connector (Optional)
The SCSI hard drive activity LED connector is a 1
x
2-pin connector that allows an add-in
hard drive controller to use the same LED as the onboard IDE controller.
For proper operation,
this connector should be wired to the LED output of the add-in hard drive controller.
The LED
indicates when data is being read from, or written to, either the add-in hard drive controller or the
onboard IDE controller (Parallel ATA or Serial ATA).
For information about
Refer to
The location of the SCSI hard drive activity LED connector on the D865GRH board
Figure 19, page 79
The signal names of the SCSI hard drive activity LED connector
Table 33, page 80
1.7.5
Real-Time Clock, CMOS SRAM, and Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory.
When the computer
is not plugged into a wall socket, the battery has an estimated life of three years.
When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to
±
13 minutes/year at 25
º
C with 3.3 VSB applied.
✏
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
1.8 I/O Controller
The I/O controller provides the following features:
•
One serial port
•
One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
•
Serial IRQ interface compatible with serialized IRQ support for PCI systems
•
PS/2-style mouse and keyboard interfaces
•
Interface for one 1.44 MB or 2.88 MB diskette drive
•
Intelligent power management, including a programmable wake-up event interface
•
PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.
For information about
Refer to
SMSC LPC47M172 I/O controller
National Semiconductor PC87372 I/O Controller