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Operating Humidity

5 - 95%, non-condensing

WATCHDOG TIMER

The Watchdog Timer is provided to ensure that standalone systems can recover from
catastrophic conditions that cause the CPU to crash. This condition can occur from ex-
ternal EMI or a software bug. When the CPU stops working correctly, hardware on the
board will either perform a hardware reset (cold boot) or a Non-Maskable Interrupt
(NMI) to bring the system back to a known state.
Two I/O ports control the Watchdog Timer:

443 (hex)

Read

Enable to refresh the Watchdog Timer

043 (hex)

Read

Disable the Watchdog Timer

To enable the Watchdog Timer, a read from I/O port 443H must be performed. This
will enable and activate the countdown timer which will eventually timeout and
either reset the CPU or cause a NMI, depending on the setting of JP5. To ensure
that this reset condition does not occur, the Watchdog Timer must periodically be
refreshed by reading the same I/O port 433H. This must be done within the time-
out period that is selected by JP12.

A tolerance of at least 20% must be maintained to avoid unknown routines
within the operating system (DOS), such as disk I/O that can be very time consum-
ing. Therefore, if the timeout period has been set to 10 seconds, the I/O port
443H must be read within 7 seconds.

Note:

When exiting a program, it is necessary to disable the Watchdog Timer, otherwise

the system will reset.

E

2

KEY™ FUNCTION

The SBC-370 provides an E

2

KEY™ function for system integrators. Based on the E

2

KEY

utility, you can freely store the ID Code, Password, or Critical Data in the 1Kbit
EEPROM. Because the EEPROM is nonvolatile memory, you don't have to worry about
losing important data.

The E

2

KEY utility is based on a 1Kbit EEPROM which is configured to 64 words

(from 0 to 63). You can access (read or write) each word at any time.

The E

2

KEY utility is provided on a CD-ROM with your system. The software utility

will include four files as files:

README.DOC

E2KEY.OBJ

EKEYDEMO.C

EKEYDEMO.EXE

9

Features

Summary of Contents for SBC-370

Page 1: ...SBC 370 SOCKET 370 CELERON PENTIUM III Board Processor Guide...

Page 2: ...s and can be damaged by a sudden rush of power To protect it from unintended damage be sure to follow these precautions Ground yourself to remove any static charge before touching the SBC 370 You can...

Page 3: ...Y FUNCTION 9 Connecting to an ATX Power Supply 10 2 Board Configuration 12 Board Layout 12 Jumpers 13 CPU Frequency Setting JP3 13 CPU Multiplier Setting JP8 13 Watchdog Timer Type Setting JP5 13 Watc...

Page 4: ...ng Started 26 Standard CMOS Setup 27 Advanced CMOS Setup 28 Advanced Chipset Setup 30 Power Management Setup 32 PCI PLUG AND PLAY Setup 33 Peripheral Setup 34 Hardware Monitor Setup 36 Change Supervis...

Page 5: ...ra software utility The DOC currently is available from 2 MB to 144 MB An advanced high performance super AT I O chip Winbond W83977TF is used in the SBC 370 board The on chip UARTs are compatible wit...

Page 6: ...to sensing interface to 10Mbps 100Mbps Network RJ45 connector for 10 BaseTX and 100 BaseTX Full Duplex capability Full software driver support Ultra DMA 33 Enhanced PCI EDI Interface Up to four PCI En...

Page 7: ...mer Can be set by 1 2 10 20 110 or 220 second periods Reset or NMI is generated when CPU does not periodically trigger the timer Your program uses hex 043 and 443 to control the watchdog and generate...

Page 8: ...y be refreshed by reading the same I O port 433H This must be done within the time out period that is selected by JP12 A tolerance of at least 20 must be maintained to avoid unknown routines within th...

Page 9: ...address is from 0 to 63 The data value is from 0 to 0xffff To begin using this function refer to the included EKEYDEMO C code Note The E2KEY function is based on the parallel port Therefore you should...

Page 10: ...etup JP7 PS 2 Mouse Setting CN2 Floppy Disk Drive CN1 Primary IDE CN3 Secondary IDE CN4 Parallel Port CN12 Serial Port 9 pin D sub COM1 CN11 Serial Port 2x5 pin header COM2 CN8 External Keyboard CN17...

Page 11: ...F ON 4 0 x OFF ON ON ON 4 5 x OFF ON OFF ON 5 0 x OFF OFF ON ON 5 5 x OFF OFF OFF ON 6 0 x ON ON ON OFF 6 5 x ON ON OFF OFF 7x ON OFF ON OFF 7 5x ON OFF OFF OFF 8x OFF ON ON OFF Refer to figure 2 for...

Page 12: ...k It is plug and play easy and reliable The DOC is available from 2 MB to 144 MB Pin Number Address 1 2 CE00 CFFF 3 4 D600 D7FF 5 6 DE00 DFFF Refer to figure 2 for the location of JP11 Clear CMOS Setu...

Page 13: ...2 Mouse Setting JP7 The PS 2 mouse uses IRQ12 while in operation JP7 Description ON Enable the PS 2 Mouse IRQ12 OFF Disable the PS 2 Mouse Refer to figure 2 for the location of JP7 15 Board Configurat...

Page 14: ...r refer to CN2 in figure 2 Board Configuration 16 Pin Number Description 1 GND 2 REDUCE WRITE 3 GND 4 NC 5 GND 6 NC 7 GND 8 INDEX 9 GND 10 MOTOR ENABLE A 11 GND 12 DRIVE SELECT B 13 GND 14 DRIVE SELEC...

Page 15: ...1 and CN3 in figure 2 17 Board Configuration Pin Number Description 1 RESET 2 GND 3 DATA 7 4 DATA 8 5 DATA 6 6 DATA 9 7 DATA 5 8 DATA 10 9 DATA 4 10 DATA 11 11 DATA 3 12 DATA 12 13 DATA 2 14 DATA 13 1...

Page 16: ...he location of this connector refer to CN4 in figure 2 Pin Number Description 1 STROBE 2 DATA 0 3 DATA 1 4 DATA 2 5 DATA 3 6 DATA 4 7 DATA 5 8 DATA 6 9 DATA 7 10 ACKNOWLEDGE 11 BUSY 12 PAPER EMPTY 13...

Page 17: ...2 Serial Port 9 pin D sub Connector COM1 Pin Number Description 1 DCD 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 RI CN11 Serial Port 2x5 pin header Connector COM2 Pin Number Description 1 DCD 2 DSR 3...

Page 18: ...Connector Pin Number Description 1 MS DATA 2 NC 3 GND 4 5V 5 MS CLK CN18 6 pin Mini DIN PS 2 Keyboard and Mouse Connector see note below Pin Number Description 1 KB DATA 2 NC 3 GND 4 5V 5 KB CLK 6 NC...

Page 19: ...built in USB ports for future I O bus expansion Pins 1 3 5 and 7 for USB 0 Pins 2 4 6 and 8 for USB 1 For the location of this connector refer to figure 2 Pin Number Description 1 VCC 3 SBD0 5 SBD0 7...

Page 20: ...cation of this connector refer to figure 2 Pin Number Description 1 VCC 2 FIR RX 3 IR RX 4 GND 5 IR TX 6 CIR RX VGA Connector J1 The built in 15 pin VGA connector can be connected directly to your mon...

Page 21: ...connector refer to figure 2 Pin Number Description 1 VCC 2 LAN ACT Fan Connector CN13 CN14 CN15 The SBC 370 provides one CPU cooling fan connector and two system fan connec tors These connectors can...

Page 22: ...Floppy Drive FDC IRQ7 Printer IRQ8 Real Time Clock IRQ9 Unused IRQ10 Unused IRQ11 Unused IRQ12 PS 2 Mouse IRQ13 FPU IRQ14 Primary IDE IRQ15 Secondary IDE DMA CHANNEL ASSIGNMENTS Channel Function 0 Ava...

Page 23: ...egister 0A0 0BF Interrupt Controller 2 0C0 0DF DMA Controller 2 0F0 Clear Math Coprocessor Busy 0F1 Reset Math Coprocessor 0F8 0FF Math Coprocessor 1F0 1F8 Fixed Disk 200 207 Game I O 278 27F Parallel...

Page 24: ...e proper usage of these features GETTING STARTED When you turn the system on the BIOS will enter the Power On Self Test routines These routines will be executed for system test and initialization and...

Page 25: ...24 hour mili tary clock i e 00 00 00 through 23 59 59 Note It is not necessary to enter the seconds or type zeros in front of numbers IDE hard disk drive setup Use one of the following setup procedure...

Page 26: ...s If the 1st Boot Device fails the BIOS will attempt to boot from the 2nd or 3rd device The Optimal and Fail Safe default settings are C A CDROM Try Other Boot Devices The BIOS will try to boot from a...

Page 27: ...access to the BIOS setup Boot to OS 2 If you run the OS 2 operating system this option must be set to Yes per mitting the BIOS to run properly if OS 2 or any other OS that does not support Plug and P...

Page 28: ...ess Strobe from SDRAM to precharge SDRAM CAS Latency Used to specify the CAS latency timing from SDRAM DRAM DRAM Integrity Mode Used to choose DRAM Integrity Mode ECC EC will enable the Error Checking...

Page 29: ...I O recovery 16bit I O Recovery Time Define the length of time for 16 bit I O recovery USB Passive Release Specify whether or not PIIX4 is allowed to use Passive Release while transferring control dat...

Page 30: ...of the system idle period while the system is in full power on state After this period of time has ended the system will go into Standby state Suspend Time Out Minute Specify the length of the system...

Page 31: ...ll PCI devices on the PCI bus PCI VGA Palette Snoop This option is useful only for a system with more than one VGA device connected to it through different bus one PCI and one ISA To enable those vari...

Page 32: ...the displayed IRQ to be used by a legacy ISA adapter card The settings are ISA EISA or PCI PnP PERIPHERAL SETUP This setup works mostly on Multi I O Chip W83977F The options are used to change the Chi...

Page 33: ...supports bidirectional transfer EPP supports devices that comply with the Enhanced Parallel Port specification ECP supports devices that comply with the Extended Capabilities Port Parallel Port IRQ T...

Page 34: ...fan speed The voltage monitoring will cover 5V 12V 12V and 5V Note Normal CPU fan RPM is more than 5000 RPM If your CPU fan RPM is less than 5000 RPM something is wrong and the CPU will be in overheat...

Page 35: ...asswords enter the BIOS SETUP menu with the Supervisor Password and then press the Enter key instead of entering a new password when the Enter Password prompt appears AUTO DETECT HARD DISK This option...

Page 36: ...S This option lets you load the Optimal default settings These settings are best case values that will provide the best performance Whenever your CMOS RAM is damaged the Optimal settings will be loade...

Page 37: ...TINGS AND EXIT Select this option when you finish setting all the parameters and want to save them into the CMOS Simply press the Enter key and all the configuration changes will be saved EXIT WITHOUT...

Page 38: ...erface 22 keyboard 20 keyboard mouse 20 LAN RJ45 23 LED for LAN 23 mouse 20 multi panel 21 parallel 18 PCI E IDE disk driver 17 serial 19 USB port 21 VGA 22 connectors 16 CPU frequency setting 13 CPU...

Page 39: ...33 PCI plug and play setup 33 peripheral setup 34 PIIX4 delayed transaction 31 PIIX4 passive release 31 plug and play aware O S 33 power management setup 32 power management APM 32 primary display 29...

Page 40: ...Xycom Automation Inc 734 429 4971 Fax 734 429 1010 http www xycom com Canada Sales 905 607 3400 Northern Europe Sales 44 1604 790 767 Southern Europe Sales 39 011 770 53 11 139908 D...

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