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PROCESSOR
Intel® Pentium®
4 processor at 2.0GHz to 2.8GHz*
Intel® Celeron® processor
at 2.0GHz*
 *Higher
speeds as available
CHIPSET
Intel's 845GV chipset features integrated
video and graphics, plus support for a 400/533MHz system
bus, DDR200/266 memory and dual USB 2.0 compatible interfaces.
BUS SPEED
| ISA |
16-bit/8MHz |
| PCI |
32-bit/33MHz |
| System/FSB |
400/533MHz |
BIOS (FLASH)
AMIBIOS8® with built-in
advanced CMOS setup for system parameters, peripheral
management for configuring on-board peripherals, PCI-to-PCI
bridge support and PCI interrupt steering. Supports
flash devices for BIOS upgrading via floppy interface.
Also provides integrated support for USB mass storage
devices such as USB CD-ROM, CD-RW,
etc. Custom BIOSs are available upon request.
CACHE MEMORY (L2 AND L1)
The Pentium 4 processor supports
a 512K integrated on-die Advanced Transfer
Cache (L2). The cache is an 8-way set associative
cache running at full processor core frequency. The
Celeron processor supports a 128K integrated on-die
Advanced Transfer Cache (L2).
Both processors include a 12K level one (L1) Execution
Trace Cache and 8K L1 data cache.
PCI BUS INTERFACE
The PCI bus interface supports a 32-bit PCI backplane
interface running at a 33MHz bus speed.
ISA BUS
The T4G provides a 16-bit ISA bus interface to the backplane
for legacy ISA slots.
EIDE ULTRA ATA/100 INTERFACES (DUAL)
Dual high-performance PCI Bus Master EIDE interfaces
are capable of supporting up to two IDE disk drives
each in a master/slave configuration. The interface
supports Ultra ATA/100 with synchronous ATA mode transfers
up to 100MB per second.
ETHERNET INTERFACE - 10/100BASE-T
The I/O Controller Hub of the T4G provides a 10/100Base-T
Ethernet interface. An RJ-45 connector
on the I/O bracket provides the physical interface to
the Ethernet network.
FLOPPY DRIVE INTERFACE
Supports up to two floppy disk drives in combinations
of 360K to 2.88MB.
SERIAL INTERFACE
The Super I/O controller supports two full-function
serial ports with independently programmable baud rates.
The controller has two high-speed, NS16C550 compatible
UARTs with Send/Receive 16-byte FIFOs.
The IRQ for each serial port has BIOS selectable addressing.
ENHANCED BI-DIRECTIONAL PARALLEL
INTERFACE
The parallel port interface is compatible with IBM PC/XT®,
PC/AT®, PS/2T, Enhanced Parallel Port (EPP1.7, EPP1.9)
and Extended Capabilities Port (ECP) modes of operation.
Both the EPP and ECP modes are IEEE 1284 compliant.
The parallel port has BIOS selectable addressing.
KEYBOARD AND PS/2 MOUSE INTERFACES
The mini DIN connector located on the I/O bracket provides
an external interface for a PS/2 mouse and keyboard.
A "Y" adapter plugged into the mini DIN connector allows
the PS/2 mouse and keyboard to share the same port.
Internal PS/2 mouse and keyboard headers are also available.
A self-resetting fuse protects the +5V
line of the keyboard and the mouse.
SYSTEM HARDWARE MONITOR
The Winbond W83783S chip supports hardware monitoring.
The functions monitored are voltage, fan speed and temperature.
The T4G hardware monitor driver allows the user to program
the monitor limits to provide trigger points for the
application software. This allows the application program
to monitor the trigger points in order to send system
alert messages or perform corrective actions.
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VIDEO INTERFACE
The analog video interface of the
845GV chipset has a wide range of video and graphic
capabilities including pixel resolution capabilities
of up to 2048 x 1536 (QXGA) and support for high performance
3D, 2D graphics and video. The chipset uses a portion
of the T4G's DDR system memory to provide video memory.
Software drivers are available for most popular
operating systems.
DDR200/266 MEMORY
Double Data Rate (DDR) memory improves
memory data speeds demanded in data-intensive
applications. The DDR200/266 interface is a single-channel
interface coming off the Memory Controller hub and terminating
at two DIMM module sockets. The DIMM sockets can be
independently populated with either PC1600 or PC2100
unbuffered memory modules. The memory interface supports
auto detection of memory up to 2GB. The bandwidth of
the DDR200/266 memory interface is 1600MB/s or 2100MB/s.
WATCHDOG TIMER
The programmable watchdog timer provides
a system reset with a total range of 30ms to 60 seconds.
The programmable increments of the watchdog are 30ms,
10s and 60s.
POWER REQUIREMENTS
Typical Values
Pentium 4:
| CPU |
+5V* |
+12V** |
+3.3V* |
| 3.06GHz/533MHz |
3.01A |
6.75A |
2.01A |
| 2.8GHz/533MHz |
3.01A |
4.65A |
2.01A |
| 2.6GHz/400MHz |
2.95A |
4.38A |
2.00A |
| 2.4GHz/533MHz |
2.95A |
3.90A |
1.99A |
| 2.0GHz/400MHz |
2.95A |
3.28A |
2.00A |
Celeron:
| CPU |
+5V* |
+12V** |
+3.3V* |
| 2.0GHz/400MHz |
2.85A |
3.45A |
1.98A |
* From backplane via PICMG® connector.
** From ATX12V power supply or equivalent via P24 connector.
The Pentium 4 processor's power requirements created the
need for an additional on-board 4-pin
power connector (P24). This connector requires +12V from
an external power supply that conforms to the ATX12V power
specification.
This external power supply should have a minimum wattage
rating of at least 250W. The T4G also requires that 3.3V
be applied to the backplane from the power supply.
POWER FAIL DETECTION
The T4G continuously monitors the incoming +5V and +3.3V
power lines from the system backplane. If the +5V line
drops below 4.75 volts or the +3.3V line drops below
2.97 volts, the T4G issues a hardware-reset
command. This feature helps maintain control and allows
the system to automatically restart. A two-pin header
is available for applications that require an external
reset switch. On-board power lines are
also monitored in a similar fashion.
BATTERY
Built-in lithium battery for data retention of CMOS
memory.
TEMPERATURE/ENVIRONMENT
| Operating Temperature |
0° - 45° C. |
| Storage Temperature |
-40° to 70° C. |
| Humidity |
5% to 90% non-condensing |
A Pentium 4 processor can consume as
much as 70 Watts of power on the T4G. The T4G's cooling
system uses a high-reliability fan.
MECHANICAL
Chassis Plans's engineers have devised a low-profile
(1.65" height) active cooling system. Overall dimensions
for the T4G, including the active cooling system are
13.3"L (338mm) x 4.8"H (121.9mm) x 1.65"W (49.1mm).
STANDARDS
- IEEE P996, Personal Computer Bus Standard
- PCI Local Bus Specification 2.1
- PICMG 1.0 Specification
MEAN TIME BETWEEN FAILURES (MTBF)
157,000 POH (Power-On Hours) at 400 C., per Bellcore
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