AR-B1476 User
’
s Guide
1-1
1. OVERVIEW
This chapter provides an overview of your system features and capabilities. The following topics are covered:
z
Introduction
z
Packing List
z
Features
1.1 INTRODUCTION
The AR-B1476 is a half size industrial grade CPU card that has been designed to withstand continuous operation
in harsh environments. The AR-B1476 supports on-board memory 8MB, and extends to 72MB DRAM for using
one 72-pin SIMM.
The 8 layers PCB CPU card is equipped with an IDE HDD interface, a floppy disk drive adapter, 1 parallel port, 2
serial ports and a watchdog timer. Its dimensions are as compact as 122mmX185mm. It highly condensed
features make it an ideal cost/performance solution for high-end commercial and industrial applications where CPU
speeding and mean time between failure is critical.
The AR-B1476 provides 2 bus interfaces, ISA bus and PC/104 compatible expansion bus. Based on the PC/104
expansion bus, you could easy install thousands of PC/104 module from hundreds venders around the world. You
could also directly connect the power supply to the AR-B1476 on-board power connector in standalone
applications.
A watchdog timer has a software programmable time-out interval, is also provided on this CPU card. It ensures
that the system does not hang-up if a program cannot execute normally.
The AR-B1476 is implemented with M1487 and M1489 chipset incorporate a memory controller, parity generation
and checking, two 8237 DMA controllers, two 8259 interrupt controllers, one 8254 timer/counter, an address buffer
and a data buffer.
A super I/O chip (SMC37C669) is embedded in the AR-B1476 card. It combines functions of a floppy disk drive
adapter, a hard disk drive (IDE) adapter, two serial (with 16C550 UART) adapters and 1 parallel adapter. The I/O
port configurations can be done by set the BIOS setup program.
As an UART, the chip supports serial to parallel conversion on data characters received from a peripheral device
or a MODEM, and parallel to serial conversion on data character received from the CPU. The UART includes a
programmable baud rate generator, complete MODEM control capability and a processor interrupt system. As a
parallel port, the SMC37C669 provides the user with a fully bi-directional parallel centronics-type printer interface.
