Vmebus Interface And Vmechip2; I/O Interfaces; Serial Communications Interface - Motorola MVME162LX 300 Series Installation And Use Manual

VMEbus Interface and VMEchip2

The local bus to VMEbus interface, VMEbus to local bus interface, and the
DMA controller functions of the local VMEbus are provided by the
VMEchip2. The VMEchip2 can also provide the VMEbus system
controller functions. Refer to the VMEchip2 in the MVME162LX
Embedded Controller Programmer's Reference Guide for additional
programming information.
Note that the ABORT switch logic in the VMEchip2 is not used. The GPI
inputs to the VMEchip2 which are located at $FFF40088 bits 7-0 are not
used. The ABORT switch interrupt is integrated into the MCchip ASIC at
location $FFF42043. The GPI inputs are integrated into the MCchip ASIC
at location $FFF4202C bits 23-16.

I/O Interfaces

The MVME162LX provides onboard Input/Output (I/O) for many system
applications. The I/O functions include serial ports and optional interfaces
for IndustryPack (IP) modules, LAN Ethernet transceivers, and SCSI mass
storage devices.
I/O signals are routed through industry-standard connectors on the
controller's front panel; no adapter boards or transition modules are
necessary. I/O connections on the controller's front panel include an
optional 68-pin SCSI connector, an optional DB15 Ethernet connector,
and four 8-pin RJ45 serial connectors. In addition, the panel has cutouts for
routing of flat cables to the optional IndustryPack modules.

Serial Communications Interface

The MVME162LX uses two Zilog Z85230 serial port controllers to
implement the four serial communications interfaces. Each interface
supports CTS, DCD, RTS, and DTR control signals, as well as the TXD
and RXD transmit/receive data signals. Because the serial clocks are
omitted in the controller's design, serial communications are strictly
asynchronous. The controller's hardware supports serial baud rates of
110b/s to 38.4Kb/s.
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Functional Description
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