Features:

. Direction of each 8-bit port is individually programmable

.64 mA sink current capability (15 mA source) .

. Separate board address decoding for control and data registers .

. Built-in test logic for fault detection and isolation .

. Highly reliable DIN-type I/O connectors .

. 8-bit, 16-bit, 32-bit transfers

The VMIVME-2510B is a member of the VMIC Megamodule family, which is designed for universal programming.

The subsystem can be configured with consecutive I/O addresses to conserve memory.

These products (VMIVME-1110. VMIVME-2120. VMIVME-2130. and VMIVME-2510B) are designed with two sets of board address switches to provide efficient memory address mapping for CSR and I/O addresses.

The CSR address switches can be configured so that all CSRs on the various boards in the system can be mapped to contiguous memory locations.

Megamodule products are also designed to support 8-bit, 16-bit and 32-bit data transfers.

Specific hardware has been designed into the VMIVME-2510B to support the built-in test functions.

The VMIVME-2510B supports off-line and on-line fault detection and isolation. The front panel Fail LED is used to indicate when a fault exists on this board.

The LED is illuminated at power-up or reset. The LED can be turned off after successfully completing board level diagnostics.

Functional Features

Compatibility VMEbus-compliant dual high-profile I/O connector type: Dual 64-pin connector, DIN 41612

I/O Organization: Eight I/O ports; eight bits wide.

Addressable to any address within the short supervisory or short unprivileged I/O mapping.

Addressing scheme:

Eight ports can be individually addressed on 8-bit or 16-bit boundaries. Address DIP switches provide unlimited selection of short data I/O address mappings.

Built-in Tests

Output data can be read back in real-time or off-line mode. Offline mode can be enabled by writing to the Control and Status Register (CSR) to set the test mode bit.

When test mode is enabled, all outputs are tri-stated (TRI-STATE).

Two test mode bits are provided so that each connector I/O (32-bit) can be tested independently if necessary.

Fault LED:

The Fault LED illuminates at power-up and system reset. It can be extinguished under program control after successfully performing diagnostics.

I/O Circuitry:

The transceivers support high current (64 mA) outputs. These octal bus transceivers use the SN74AS645 in the logic level TTL I/O option. The open collector option uses the SN74AS641 type transceiver.

If the open collector option is ordered, all 64 bits are output only.