North Atlantic Industries’ unique Multifunction Board design eliminates the complexity and size constraints of using multiple, specialized, single-function cards by providing a single board solution for a broad assortment of I/O, Communication, Synchro/Resolver, LVDT and other signal interface functions. Based upon advanced multiple DSP design techniques, the state-of-the-art board architecture allows users the flexibility to mix and match a variety of functions to meet their specific application requirements. This universal multi-function design provides high functional density which results in:
The N7 and N8 MIL-STD-1553 Modules available for Multifunction Boards provide two dual-redundant MIL-STD-1553B Notice 2 interface channels, with 128Kbyte (64K words) on board memory per channel. Each channel can be configured to act as a Bus Controller (BC), Remote Terminal (RT) or Monitor (MT).
As a Remote Terminal
| Indexing |
Bulk transfers up to 256 messages per sub-address. Core can signal host via interrupt. |
| Buffer Ping-Pong |
Using dual buffers per sub-address for data processing. Core may process message while host can access secondary buffer. |
| Circular buffers |
Simplify software servicing during periodic or burst data transfers. User selects circular buffer mode at start-up or as default. |
| Broadcast |
Filter or segregate broadcast from non-broadcast commands. |
| Interrupts |
Can Store up to 16 interrupts and the sub-address or command block that generated it in a 32 word buffer prior to servicing. |
As a Bus Monitor
| Message Processing |
Pull messages from the bus and store information (command, status and data locations) in monitor blocks, eight-word locations in memory |
| Terminal Addresses |
Monitor specific terminal addresses as required. |
As a Bus Controller
| Multiple Message Processing |
Chain multiple MIL-STD-1553 commands into major and minor frames as needed. Message Scheduling Perform periodic message transactions with multiple remote terminals. |
| Automatic Retry |
Core supports message retry |
The MIL-STD-1553 Modules provide support for automatic message return and health monitoring (BIT). These modules have been validated to the MIL-STD-1553 RT Validation Test Plan (VTP) by an outside recognized 1553 consultant.