Acrosser AR-B1894 User Manual
Page 6
 
1. Introduction
1.1 Description 
The AR-B1894 all-in-one Mini ITX is designed to fit a high performance Pentium 
M based processor and compatible for high-end computer system application 
with PCI bus architecture. It is made to meet today’s demanding pace, and keep 
complete compatibility with hardware and software designed for the IBM PC/AT. 
The on-board devices support one PCI slot, integrated graphics, and on-board 
three Marvell Gigabit Ethernet controllers. It’s beneficial to build up a high 
performance and high data availability system for VARs, or system integrators. 
AR-B1894 support the following processors: 
Intel ® uFC-PGA 478 Pentium M® / Celeron M processor FSB 400/533 MH 
with 0.90 and 0.13 micron technology. 
This Mini ITX can run with Intel Socket 479 Pentium/Celeron M processors and 
support DIMM up to 2 GB dual-channel DDR2 533 memory. The enhanced on-
board one PCI-IDE interface can support 1 drive up to PIO mode 4 timing and 
Ultra ATA 33/66/100 synchronous mode feature, one CF socket interface, and 2 
Serial ATA high-speed data transfers at up to 150 MB/s connectors. The on-
board Super I/O chipset supports two serial ports, one SIR (Serial Infrared) port, 
two high performance 16C550-compatible UARTs provide 16-byte send/receive 
FIFOs, and two RS-232 serial port interfaces. Besides, H/W monitor function, 
Intel High Definition Audio as 5.1 surround sound, six Hi-Speed USB 2.0 ports 
offering up to 40X greater bandwidth over USB 1.1. Also provide dual display 
function by VGA and DVI, by VGA, and LVDS interface. 
The Mini-ITX standard makes the
AR-B1894 work with the one slot PCI and one
6-pin Mini-DIN connector for PS/2 mouse and keyboard. The on-board Flash 
ROM is used to make the BIOS update easier. The high precision Real Time 
Clock/calendar is built to support Y2K for accurate scheduling and storing 
configuration information. One 20-pin standard connector is designed to support 
ATX power function. A feature of CPU overheat protection will give user more 
security and stability. All of these features make AR-B1894 series excellent in 
stand-alone applications. 
Note: 1) The AR-B1894 only support Intel Pentium/Celeron M processor
(Dothan 400/533 FSB) for 0.13 and 0.90 micron.
2) The AR-B1894 only support DDR2 533 memory module.