Motorola MVME162P-242, Installation And Use Manual

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Functional Description
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Serial Communications Interface
The MVME162P2 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 MVME162P2 implementation,
serial communications are strictly asynchronous. The MVME162P2
hardware supports serial baud rates of 110b/s to 38.4Kb/s.
The Z85230 supplies an interrupt vector during interrupt acknowledge
cycles. The vector is modified based upon the interrupt source within the
Z85230. Interrupt request levels are programmed via the Petra MC2
function (the MC2 emulation can handle up to four Z85230 chips). Refer
to the Z85230 data sheet listed listed under Manufacturer’s Documents in
the Related Documentation appendix, and to the MC2 programming model
in the MVME1X2P2 VME Embedded Controller Programmer’s Reference
Guide, for information.
The Z85230s are interfaced as DTE (data terminal equipment) with EIA-
232-D signal levels. The four serial ports are routed to four RJ45
connectors on the MVME162P2 front panel.
IndustryPack (IP) Interfaces
The IP2 function in the Petra ASIC supports four IndustryPack (IP)
interfaces; the MVME162P2 board itself accommodates up to two IP
modules. The IP modules are accessible from the front panel. The IP2
function as implemented on the MVME162P2 also includes two DMA
channels (one for each IP, or two for a double-wide IP), 32 or 30MHz (32
MHz for MC68LC0x0 or 30 MHz for MC680x0) or 8MHz IndustryPack
clock selection (jumper selectable), and one programmable timebase
strobe which is connected to the two interfaces. Refer to the IP2
Programming Model in the MVME1X2P2 VME Embedded Controller
Programmer's Reference Guide for details of the IP interface. Refer to
Chapter 5, Pin Assignments for the pin assignments of the IP connectors.