ADLINK NuPRO-840 P4 Industrial SBC Architecture Maintenance

ADLINK NuPRO-840 Full length Card P4 Industrial SBC Architecture Configuration and Maintenance Detailed Explanation

In the field of industrial computing platforms, with the continuous increase in processor performance requirements, full-length PICMG single board computers based on Intel Pentium 4 processors once became the mainstream choice for high-end industrial automation, image processing, and telecommunications applications. The NuPRO-840 series launched by ADLINK is a representative product of this period - equipped with Intel 845 chipset, Pentium 4 processor (1.3GHz~2.4GHz and above) supporting mPGA478 interface, DDR memory, SiS305 independent video memory VGA controller, dual gigabit/100Mbps Ethernet ports (depending on the model number), Ultra DMA/100 IDE, and high driver ISA bus, providing strong support for industrial scenarios that pursued ultimate computing performance at that time.

To this day, a large number of industrial control systems based on NuPRO-840 continue to operate in production lines, traffic monitoring, and military equipment. For engineers responsible for maintaining these systems, a deep understanding of the power consumption characteristics, jumper logic, watchdog programming interface, hardware monitoring mechanism, and driver installation points of the board is key to achieving fast fault location and reliable maintenance. This article is based on the official user manual and systematically outlines the core specifications, onboard interfaces, key configurations, watchdog timer programming, system monitoring functions, and driver deployment process of NuPRO-840 (including DV/LV sub models). The aim is to provide a highly operational technical reference for on-site maintenance and system upgrades.

Product series overview and model differentiation

The NuPRO-840 series consists of two main models, with the core difference being the network interface configuration:

Features NuPRO-840DV NuPRO-840LV

Processor Pentium 4 (mPGA478) Pentium 4 (mPGA478)

Chipset Intel 82845 DDR Intel 82845 DDR

Memory 2xDDR DIMM, maximum 2GB 2xDDR DIMM, maximum 2GB

VGA SiS305 (8/16MB VRAM) SiS305 (8/16MB VRAM)

Ethernet dual port (82540 Gigabit+82562 100Mbps) single port (only 82562 100Mbps)

I/O chip Winbond W83627HF Winbond W83627HF

Audio supports AC'97 (requires expansion board)

The NuPRO-840DV is more suitable as a gateway or communication node that requires redundant network links due to its dual network ports; The NuPRO-840LV is suitable for control applications that only require basic network connectivity. The two are highly compatible in terms of jumpers, BIOS, and drivers.

Core hardware architecture and technical characteristics

1. Processor and chipset

CPU socket: mPGA478 ZIF socket, supports Intel Pentium 4 FC-PGA2 processor (Willamette/Northwood core), front-end bus 400MHz.

Chipset: Intel 82845 Memory Control Center (MCH)+82801BA I/O Control Center (ICH2). This combination supports up to 2GB DDR SDRAM (200MHz, i.e. PC-1600 or PC-2100) and provides 1GB/s memory bandwidth.

Memory: Two 184 pin DDR DIMM slots, supporting 2.5V single/double-sided DIMMs, must use 200MHz DDR SDRAM (PC-1600/2100).

2. Display and Storage

VGA: iS305 3D graphics engine, equipped with 8/16MB dedicated graphics memory (display cache U1/U3), supports AGP 2X, and has a maximum resolution of 1600 × 1200. Supports DDC2B.

IDE: Dual channel EIDE, supports Ultra DMA/33/66/100, can connect up to four IDE devices (CN1 Primary/CN3 Secondary). The 20 pins of Primary IDE provide+5V power and can be directly plugged into DiskOnModule (DOM).

FDD: CN5 34 pin interface, supports two floppy drives.

3. I/O interface

Serial port: COM1 (CN4) and COM2 (CN2), both RS-232 (16550 compatible).

Parallel port: CN7, supports SPP/EPP/ECP mode, ESD protection 4KV.

USB：CN11， Two USB 1.1 ports with independent overcurrent protection.

PS/2: CN17 is a keyboard/mouse combination interface (separated by a Y-shaped line), and there is also an external keyboard interface for CN18.

IrDA：CN10， Support infrared communication (SIR).

4. Network (only DV or LV with single port)

LAN1 (100Mbps): Intel 82562EM, supports 10/100Mbps adaptive, WOL， Located at CN13 (RJ-45).

LAN2 (Gigabit, DV only): Intel 82540EM, supports 10/100/1000Mbps, located on CN22 (RJ-45), with independent LED indicating link and activity status.

5. PCI to ISA Bridge and ISA High Driver

Adopting ITE IT8888 bridge chip, 32-bit PCI to ISA, compliant with PCI 2.1 specification. The ISA bus provides 64mA high drive capability on all data, address, and control lines, which is particularly important for driving multi load ISA expansion cards such as data acquisition and motion control.

6. Hardware monitoring and system management

Monitoring chip: Winbond W83627HF (embedded hardware monitoring).

Monitoring items: CPU temperature (via CN12 external thermistor), system voltage, fan speed (FN1/FN2/FN3, 3-pin speed measurement), chassis opening (JP2).

SMBus: Onboard SMBus interface (CN8), used for reading DIMM SPDs and communicating with monitoring devices.

7. Watchdog timer

Based on logical device 8, the timeout range for CRF5 (control), CRF6 (counting), and CRF7 (status) is 1-255 seconds or 1-255 minutes.

Supports two-level triggering: the first level can choose NMI or Initiat, and the second level triggers a hard reset.

Key jumpers and configurations

There are only two user configuration items on the NuPRO-840, both located in specific positions on the motherboard:

1. Clear CMOS (JP1)

Normal operation: 1-2 short circuits (default).

Clear CMOS: Move the jumper cap to 2-3 and hold for about 2 seconds before moving it back to 1-2 to clear BIOS settings and passwords.

Application scenario: When unable to start due to BIOS parameter errors, use this operation to restore the factory default.

2. Front panel reset (pins 15-16 of CN16)

It is not a jumper, but connected to CN16's 15 (RESETBTN) and 16 (GND) through the front panel buttons of the chassis to achieve external hard reset.

Power consumption characteristics and heat dissipation requirements

Based on the high power consumption characteristics of the Pentium 4 architecture, special attention should be paid to the power and heat dissipation design of the NuPRO-840. Taking the P4 2.4GHz+1GB DDR configuration as an example, the measured power consumption is as follows:

Power rail current power

+5V 5.24A 26.20W

+12V (CPU powered) 4.46A 53.52W

+12V (system, including CPU fan about 200mA) 0.4A 4.80W

-12V 0.1A 1.20W

Total - approximately 85.72W

Key project reminder:

Forced air cooling (recommended external airflow+CPU fan) must be provided inside the chassis to ensure that the CPU core temperature does not exceed 100 ° C under any operating conditions, otherwise permanent damage may occur.

If using ATX power supply, it is necessary to ensure that the+12V power supply capacity is not less than 5A (measured CPU consumes 4.46A separately). It is recommended to choose an ATX power supply with a rated power of not less than 300W.

If Wake On LAN and other functions are required, it is also necessary to ensure+5VSB standby power supply capability.

System monitoring and SMBus address

The SMBus of NuPRO-840 can access multiple onboard devices for status reading and diagnosis:

From device address function device

0xA0 DIMM0 SPD Information DIMM1

0xA2 DIMM1 SPD Information DIMM2

0xAD Control and Status W83627HF

Built in LAN ID and control 82562EM/82540EM

Chassis Intrusion: Connected to the microswitch on the chassis cover via JP2. Even if the system is powered off (as long as the battery or standby power is present), intrusion events can still be latched and alarms can be cleared through the SMI # mask register of W83627HF.

Watchdog Timer Programming Guide

The watchdog of NuPRO-840 is based on Winbond W83627HF logic device 8, configured through I/O ports 2Eh/2Fh (or 3F0h/3F1h). The following is an example of a 15 second timeout reset (in assembly language):

assembly

Enter the extended function mode

mov dx, 2eh

mov al, 87h

out dx, al

out dx, al

Configure CR2B - Select WDTO function (bit4=0)

mov dx, 2eh

mov al, 2bh

out dx, al

mov dx, 2fh

mov al, 0c0h

out dx, al

Select logical device 8

mov dx, 2eh

mov al, 07h

out dx, al

mov dx, 2fh

mov al, 08h

out dx, al

Configure CRF5- Control Register

mov dx, 2eh

mov al, 0f5h

out dx, al

mov dx, 2fh

mov al, 00h   ; Bit3=0->seconds; Bit3=1->minutes

out dx, al

Set timeout value CRF6 to 15

mov dx, 2eh

mov al, 0f6h

out dx, al

mov dx, 2fh

mov al, 0fh   ; 15 seconds/minute

out dx, al

Exit the extended function mode

mov dx, 2eh

mov al, 0aah

out dx, al

Practical tip:

In the application, it is possible to periodically 'feed the dog' by writing overload values to specific registers (or using keyboard/mouse interrupts).

If using the second level reset function of WDT, it is necessary to ensure that bit 4 of CR2B is 0 (select WDTO instead of GPO24).

ADLINK provides the testing tool test.exe (located on the accompanying CD) to quickly verify WDT functionality.

BIOS Setting Points

The NuPRO-840 uses Phoenix Ward BIOS and enters the settings interface by pressing the Del key during startup. The key configuration items include:

Chipset options: DDR timing parameters, AGP memory size, etc. can be set, it is recommended to keep them as default.

Power management: Supports ACPI and can configure wake-up events such as WOL and modem ring.

Integrated peripherals: The onboard VGA (SiS305), LAN, or audio (AC'97) can be disabled separately to release interrupt resources.

PNP/PCI configuration: If using a traditional ISA card, a specific IRQ can be set to "Legacy ISA" to avoid conflicts.

IDE configuration: Supports automatic detection of PIO/UDMA modes, it is recommended to set it to Auto to maximize performance.

Special note: NuPRO-840 supports a PXE pre boot execution environment and can be used for remote installation of operating systems on networks, making it suitable for large-scale deployment scenarios.