Advantech MIC-3392A 6U CompactPCI Single Board Computer – MIC Series

Advantech MIC-3392A — 6U CompactPCI Single Board Computer in Mission-Critical Control Architectures

The MIC-3392A occupies the system slot of a 6U CompactPCI chassis and functions as the central arbitration and processing node for the entire backplane. In a distributed control loop — whether managing a multi-axis servo system, a SCADA data concentrator, or a real-time protocol gateway — the board’s role is not merely computational. It governs bus mastership, interrupt latency, and I/O scheduling across all peripheral slots. The Intel Core 2 Duo processor, paired with the Intel 945GM/ICH7-M chipset, delivers a dual-core x86 architecture with a 4 MB L2 cache shared across both cores, enabling symmetric multiprocessing (SMP) workloads without the overhead of discrete co-processor arbitration. The front-side bus operates at 667 MHz, sustaining a theoretical peak bandwidth of 5.3 GB/s between the processor and the memory controller hub — a figure that directly determines how quickly the board can service DMA requests from CompactPCI peripheral cards during burst I/O cycles.

The CompactPCI backplane interface operates at 32/64-bit width with a maximum clock of 66 MHz, yielding a peak backplane throughput of 533 MB/s in 64-bit mode. The MIC-3392A implements the PICMG 2.0 R3.0 system-slot specification, meaning it asserts REQ64# and ACK64# during bus enumeration to negotiate 64-bit transfers with compliant peripheral boards. For integrators migrating from legacy 32-bit cPCI infrastructure, the board maintains backward compatibility by falling back to 32-bit PCI protocol without chassis modification. The ICH7-M south bridge provides two independent PCI Express lanes routed to the dual Gigabit Ethernet controllers (Intel 82573L and 82541PI), isolating network traffic from the CompactPCI backplane and eliminating the bus contention that would otherwise degrade deterministic response times in high-throughput data acquisition scenarios.

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Technical Parameters

Hardware Logical Analysis

The MIC-3392A’s EMC architecture addresses two distinct interference vectors: conducted emissions on the CompactPCI backplane power rails and radiated emissions from the high-frequency processor and memory subsystem. On the conducted side, the board employs bulk decoupling capacitors (tantalum and ceramic, X7R dielectric) placed within 2 mm of the power pins on the J1/J2 connectors, suppressing switching transients generated by the Core 2 Duo’s SpeedStep power state transitions. The DDR2 memory traces are length-matched in differential pairs with controlled impedance (50 Ω single-ended, 100 Ω differential), minimizing reflections that would otherwise manifest as radiated emissions in the 333–667 MHz band.

The dual Gigabit Ethernet controllers are connected to the ICH7-M via dedicated PCIe ×1 lanes rather than sharing the legacy PCI bus. This architectural decision eliminates the head-of-line blocking that occurs when a high-bandwidth network transfer competes with CompactPCI DMA cycles on a shared 32-bit PCI segment. Each PCIe ×1 lane provides 250 MB/s full-duplex bandwidth — sufficient to sustain wire-rate GbE throughput (125 MB/s per port) without back-pressure on the backplane arbitration logic.

The board’s BIOS implements a deterministic boot sequence with configurable POST timeout, allowing system integrators to define a maximum boot window for watchdog-supervised applications. The ICH7-M’s integrated watchdog timer can be programmed via I/O port access to assert a system reset if the application software fails to service the timer within a defined interval — a critical feature for unattended embedded deployments where a hung OS must not persist indefinitely. The CompactFlash socket is wired to the IDE channel in True IDE mode, providing a solid-state boot medium with no moving parts and a write endurance specification compatible with industrial duty cycles.

Thermal management relies on a combination of a low-profile heatsink with copper heat spreader over the Core 2 Duo die and a forced-air assumption consistent with standard CompactPCI chassis airflow (front-to-rear, minimum 200 LFM). For sealed enclosure deployments, Advantech offers a conduction-cooled variant where the heatsink is replaced by a wedge-lock rail assembly that transfers heat to the chassis side walls, eliminating the dependency on chassis airflow entirely.

System Integration Benefits

• Deterministic Interrupt Latency: The ICH7-M’s APIC (Advanced Programmable Interrupt Controller) routes hardware interrupts directly to the Core 2 Duo without passing through the legacy 8259 PIC chain, reducing worst-case interrupt latency to sub-microsecond levels under Linux PREEMPT_RT or VxWorks hard real-time kernels.
• Backplane Bus Arbitration Transparency: As the PICMG 2.0 system-slot board, the MIC-3392A implements the central bus arbiter, granting REQ/GNT cycles to peripheral boards in a configurable round-robin or priority scheme — giving system architects direct control over bus access fairness without external arbitration hardware.
• Dual Independent Network Paths: The two GbE controllers on separate PCIe lanes allow one port to carry control-plane traffic (Modbus TCP, EtherNet/IP) while the second handles bulk data transfer (historian uploads, firmware distribution), with zero cross-contamination of traffic classes.
• Hot-Swap Compliance: Full PICMG 2.1 R2.0 hot-swap support enables live board extraction and insertion without chassis power-down, reducing scheduled maintenance windows in 24/7 production environments to the time required for physical board swap — typically under 60 seconds.
• Configurable Serial Protocol: RS-232/422/485 mode selection via BIOS eliminates the need for external protocol converters when interfacing with legacy field devices (PLCs, drives, meters) that use half-duplex RS-485 at baud rates up to 921.6 kbps.
• PMC Mezzanine Expansion: The J3/J4/J5 rear connectors support one PMC site, allowing the addition of specialized I/O mezzanines (FPGA-based, analog, or MIL-STD-1553) without consuming a peripheral CompactPCI slot — preserving backplane slots for additional I/O boards.
• Validated BSP Ecosystem: Advantech-supplied Board Support Packages for VxWorks 6.x and Linux 2.6 include pre-compiled drivers for all on-board peripherals (GbE, USB, SATA, serial, CompactFlash), reducing software integration time from weeks to days for teams without low-level driver development resources.
• Long-Lifecycle Availability: Advantech’s 5+ year product availability commitment, combined with the MIC-3392A’s position in the mature MIC platform, provides procurement engineers with a stable BOM anchor — eliminating the redesign cost associated with processor board obsolescence in long-lifecycle programs (defense, rail, energy).

Quality Assurance & Global Logistics

Every MIC-3392A unit supplied by siemensplc.com is sourced from verified Advantech distribution channels and undergoes a structured incoming inspection protocol before dispatch. Inspection covers visual examination of PCB surface and component placement, power-on POST verification, functional test of all front-panel I/O ports (GbE link negotiation, USB enumeration, VGA signal presence, serial loopback), and CompactFlash read/write cycle validation. Units are supplied with original Advantech labeling, revision markings, and — where available — original anti-static packaging and factory documentation.

Shipments originate from Xiamen, China, a major logistics hub with direct access to Xiamen Gaoqi International Airport (XMN) and Xiamen Port, supporting both air freight and sea freight consolidation. Standard air freight transit times are 3–5 business days to Southeast Asia, 5–7 business days to Europe and the Middle East, and 6–9 business days to North America, depending on carrier and customs clearance. All shipments are packed with ESD-protective bags, foam-lined cartons, and humidity indicator cards. Export documentation (commercial invoice, packing list, certificate of origin) is prepared to facilitate customs clearance in the destination country. A 12-month warranty covers functional defects attributable to manufacturing or material failure under normal operating conditions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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