SBS Technologies VIPC616 Carrier Board

SBS Technologies VME System Expansion Tool: VIPC616 Industry Pack Carrier Board

In the VME bus system, the flexible expansion capability of the I/O module determines the adaptability and lifecycle of the system. VIPC616 is a mature 6U VMEbus Industry Pack carrier board that provides installation capabilities for four single width or up to two double width Industry Pack modules, supporting I/O, ID, memory, and interrupt cycles. This article will deeply analyze the design essence and usage points of VIPC616 from multiple dimensions, including application background, hardware characteristics, address mapping, interrupt management, front-end and back-end I/O allocation, power filtering and protection, environmental adaptability, supporting engineering kits, and related products.

The role of the Industry Pack ecosystem and VIPC616

Industry Pack (IP) is a modular I/O standard widely used in industrial control, data acquisition, communication, and military embedded computing. The IP module is compact and interchangeable, and can be connected to various system buses (such as VME, PCI, CompactPCI, etc.) through a carrier board. VIPC616 is precisely such a 6U VME carrier board, which converts the signal of the VME backplane into the timing and power required by the Industry Pack, while providing mechanical fixation.

Compared to the higher end VIPC618 (which uses shielded high-density D-type connectors to reduce EMI), VIPC616 uses right angle unshielded ribbon cable connectors, which are more cost-effective and suitable for environments that are insensitive to electromagnetic interference or require rapid prototyping. The two software are fully compatible and can be used interchangeably.

Overall characteristics of the board

6U VME appearance, compliant with IEEE P-1024/D1.2 and ANSI/VITA-4-1995

Four Industry Pack slots (can accommodate up to two dual wide IPs)

Supports I/O, ID, memory, and interrupt response cycles

Front end I/O uses a pair of 50 pin right angled keyway ribbon cable connectors (with pop-up device) shared by every two IP slots

64 rear I/O are led out through P2 connector (all 50 I/O in D slot+14 I/O optional in C slot)

Memory mapping supports A24 (0-2MB per slot) or A32 (8MB per slot)

128 byte I/O space and 128 byte ID space per IP slot

Green access indicator lights for each slot on the front panel, as well as two sets of power status indicator lights (A/B slot and C/D slot)

All IP power cords are equipped with fuses, RF filters, and decoupling capacitors

Standard interrupt mapping: Jumper blocks map 8 IP interrupt lines one-to-one to VME IRQ1-7

Optional user PLD implementation for arbitrary complex interrupt mapping

Does not support 32-bit IP interface, does not support IP DMA

The IP clock is only 8 MHz

Detailed explanation of address space and memory mapping

VIPC616 maps the three address spaces of IndustriePack to VMEbus:

1. I/O space

VME bus access: A16/D16, fixed 128 bytes per IP slot

Support user mode and super user mode

Supports test and set operations, suitable for semaphores in multi master device systems

2. ID space

Also 128 bytes, read-only, used to identify the manufacturer, model, and version of the IP module

3. Memory space

Optional mapping to A24 or A32

If A24 is selected: Each slot can be configured as no memory, 128KB, 256KB, 512KB, 1MB, or 2MB (set through jumper or PLD)

If A32 is chosen: Each slot supports 8MB of fixed memory, fully utilizing the upper limit of IP specifications

Note: A24 and A32 cannot be used in different slots at the same time. The entire carrier board uses the same memory mapping mode

This flexibility allows VIPC616 to work with both low-end IP modules (requiring only a small memory window) and accommodate data acquisition or image processing IPs that require large buffers.

Deep analysis of interrupt architecture

The interrupt handling of VIPC616 is one of the key factors in its practicality.

Each IndustriePack can generate up to two interrupt requests (such as INT0 and INT1), with a total of 8 interrupt requests across four IPs.

Default configuration: Map 8 interrupt lines one-to-one to 7 interrupt levels (IRQ1-IRQ7) of VMEbus through a set of jumpers. Due to 8>7, one line will be mapped to a reserved or unused level, usually designed for reasonable allocation.

Advanced configuration: Users can program PLDs (Programmable Logic Devices) to plug into onboard sockets, enabling arbitrary interrupt mapping logic, such as:

Multiple IP interrupts share the same VME IRQ

Interrupt priority encoding (encoding 8 lines into 3 lines)

Level/Edge Conversion

Interrupt blocking and routing

The original factory can provide pre programmed PLD versions, please contact the factory for customization.

For most applications, default jumper mapping is sufficient. However, in complex multi interrupt systems, custom PLDs can greatly simplify the design of software interrupt service programs.

I/O signal routing strategy: dual path for front and rear panels

The unique advantage of VIPC616 is that I/O signals can be led out from both the front panel and the backplane P2, and even used simultaneously (note the load).

front panel

Every two IP slots (such as A+B, C+D) share a pair of 50 pin ribbon cable connectors.