MVME331 VMEbus Intelligent Communications Controller MOTOROLA

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Essential details：MVME331 VMEbus Intelligent Communications Controller MOTOROLA

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The Motorola MVME331 VMEbus Intelligent Communications Controller (ICC) supports six asynchronous serial communication channels at a maximum simultaneous speed of 9600 Baud full duplex. The module contains a complete 16-bit microcomputer consisting of an MC68010 MPU, 128KB (optionally 512KB) RAM and firmware in 32KB ROM. This microcomputer controls three Z8530 Serial Communication Devices, pre-processes and transfers data between the VME system memory and the serial ports.

The transfer of commands, status messages and data packets is performed through a pipeline structure in the VME memory system, which is shared between the operation system and the MVME331 firmware. This transfer follows the Buffered Pipe Protocol (BPP), a Motorola standard for processor to processor communication. MVME331 drivers are available for VERSAdos and UNIX SYSTEM V/68.

Each of the six serial channels can be configured to conform to the RS232C or RS422B standard. This is implemented on a separate board, the MVME705A, 6-Channel Serial Transceiver Module, which is connected via ribbon cable with the lower rear connector of the MVME331 module.

MVME331

The DSP is an I/O Olannel-compatible dual RS-232C serial interface module. ‘!his module conforms to the sing1e-wide VME board form factor and interfaces to the I/O Channel with a single 64-pin DIN 41612 standard connector; however, because of the wide front panel, the DSP occupies two module card slots. 1he DSP is used to expand the resources of an I/O Channel master to include one or two additional RS-232C serial data ports.
An NEC7201 serial controller is used to provide multiprotocol capabilities (asynchronous, bisynchronous, HOLC, and SDLC). ~dem output control lines (RTS, CTS, DTR, DCD, DSR, and RI) are provided, in addition to the clock and data lines. A front panel FAIL LED indicator is used to indicate a module malfWlction.
The user must provide a connector-compatible I/O Channel backplane or ribbon cable to connect the DSP to the I/O Olannel master. Refer to the I/O Olannel Specification Manual, ~torola publication number M68RIOCS, for interfacing and backplane information. 1he user must also provide the RS-232C cables to connect the DSP (via front panel connectors) to the terminal/modem devices.

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