user manual

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Board Level Hardware Description
2
VMEbus Interface
The VMEchip2 provides:
❏ Local bus to VMEbus interface
❏ VMEbus to local bus interface
❏ Local-VMEbus DMA controller functions
❏ VMEbus system controller functions
I/O Interfaces
The MVME187 provides onboard I/O for many system
applications.
❏ The I/O functions include:
Ð Serial ports
Ð Printer port
Ð Ethernet transceiver interface
Ð SCSI mass storage interface
❏ An external I/O transition board such as the MVME712X
should be used to convert the I/O connector pinout to
industry-standard connectors.
❏ The configuration headers are located on the MVME187 and
the MVME712X transition board.
The I/O on the MVME187 is connected to the VMEbus P2
connector. The MVME712X transition module is connected to the
MVME187 through cables and a P2 adapter board.
Serial Port Interface
The CD2401 serial controller chip (SCC) implements the four serial
ports. The serial ports support the standard baud rates (110 to 38.4K
baud). The four serial ports are different functionally because of the
limited number of pins on the P2 I/O connector.