Abaco Systems / SBS / Bit 3 82902270 VMEbus Adapter with DMA Controller Module

The Abaco Systems / SBS / Bit 3 82902270 is a VMEbus adapter module featuring a Direct Memory Access (DMA) controller, designed to facilitate high-speed data transfers between systems. This module enables transparent connectivity, allowing the address space of a destination bus to appear as additional address space to the host bus through memory and I/O mapping. It supports various data transfer sizes and addressing modes, and its DMA controller is capable of moving large data blocks with minimal processor overhead, achieving sustained transfer rates. The adapter can also function as a VME system controller, providing essential clock and reset signals.

### Technical Specifications

* **Data Transfer Modes:**
* 32-, 16-, or 8-bit data transfers
* DMA Controller Mode and Slave Mode DMA
* **Addressing:**
* A16, A32, or A24 addressing
* **Memory Mapping:**
* Flexible mapping of address space between systems’ memories and I/O address spaces
* Jumper settings allow mapping of destination VMEbus “windows” into local VMEbus address space
* Transparent connectivity achieved via memory and I/O mapping, transposing defined address ranges to selected global memory address space and I/O on the destination bus
* Memory mapping hardware allows discontiguous remote addresses to be mapped to contiguous local addresses
* Simple C language pointers can be used to access remote resources
* Any memory or I/O space address can be memory mapped
* **DMA Controller:**
* Facilitates high-speed data movement between two systems with little processor overhead
* Reads data from one bus and writes to another; interrupts processor upon completion
* DMA modes support Dual Port RAM
* Sustained DMA data transfer rates up to 26 M Bytes/sec from chassis to chassis
* Allows VMEbus DMA devices to perform DMA directly into VMEbus memory at rates exceeding 12 M Bytes/sec
* **Shared Memory (Optional Dual Port RAM):**
* Up to 8 MBytes of optional shared memory can be added
* Dual Port RAM access does not require access to the other bus, enhancing system security and limiting bandwidth use
* Dual Port RAM arbitration is handled by the card itself
* **System Control:**
* Can provide slot 1 VME system controller functions
* Provides VME system clock and system reset
* Offers four-level priority, four-level round-robin, or single-level bus arbitration
* Provides bus error global timeout
* **Interconnects:**
* Utilizes a streamlined, simple no-protocol connection to create a unified bus
* The timing of the two buses is linked only when a memory or I/O reference translates between systems, preserving bandwidth during non-transfer periods
* **Interrupt Handling:**
* Interrupts can be passed directly between two buses
* All seven VME interrupts can be monitored and acknowledged from the host system, eliminating the need for polling
* Supports at least one programmed interrupt for host-remote process communication
* An error interrupt monitors adapter hardware status, eliminating the need for polling for errors
* **Physical Interface:**
* This module is identified as the VME board half of various adapter interface combos

### Compatibility

* The module is also known by other part numbers, including the VME board half of P/N 413-1-101 and 477-202.
* It is compatible with VMEbus systems, supporting A16, A32, or A24 addressing.

### Electrical

* **Data Transfer Rates:**
* Sustained DMA data transfer rates up to 26 M Bytes/sec (chassis to chassis)
* Rates exceeding 12 M Bytes/sec for VMEbus DMA devices into VMEbus memory
* Note: Actual performance rates depend on the capabilities of the specific VMEbus systems and memory speeds.

### Interfaces

* **Bus Connectivity:** VMEbus Adapter
* **Direct Memory Access (DMA):** Integrated DMA controller
* **Optional Shared Memory:** Dual Port RAM support up to 8 MBytes

Why Choose Aumictech for Abaco Systems / SBS / Bit 3 82902270 VMEbus Adapter with DMA Controller Module?
At Aumictech, we specialize in supplying high-end VMEbus equipment. Whether you need seamless system integration, high-speed data transfer capabilities, or robust DMA control, our team ensures the Abaco Systems / SBS / Bit 3 82902270 VMEbus Adapter with DMA Controller Module delivers maximum performance for your application.