Asynchronous Debug Port; Pci-Isa Bridge (Pib) Controller - Motorola MVME2400 Series Installation And Use Manual

Maximum performance is achieved with D64 Multiplexed Block
Transfers (MBLT). The on-chip DMA channel should be used to move
large blocks of data to/from the VMEbus. The Universe should be able to
reach 50MB/second in 64-bit MBLT mode.
The MVME2400 interfaces to the VMEbus via the P1 and P2 connectors,
which use the new 5-row 160-pin connectors as specified in the VME64
extension standard. It also draws +5V, +12V, and –12V power from the
VMEbus backplane through these two connectors. 3.3V and 2.5V supplies
are regulated onboard from the +5 power.

Asynchronous Debug Port

A Texas Instrument's Universal Asynchronous Receiver/Transmitter
(UART) provides the asynchronous debug port. TTL-level signals for the
port are routed through appropriate EIA-232-D drivers and receivers to an
RJ-45 connector on the front panel. The external signals are ESD
protected.
For detailed programming information, refer to the MVME2400 Series
VME Processor Module Programmer's Reference Guide and to Texas
Instrument's data sheet #SLLS057D, dated August 1989, revised March
1996 for Asynchronous Communications Element (ACE) TL16C550A.

PCI-ISA Bridge (PIB) Controller

The MVME240x uses a Winbond W83C553 PCI/ISA Bridge (PIB)
Controller to supply the interface between the PCI local bus and the ISA
system I/O bus (diagrammed in
The PIB controller provides the following functions:
http://www.motorola.com/computer/literature
PCI bus arbitration for:
– ISA (Industry Standard Architecture) bus DMA (not functional
on MVME240x)
– The PHB (PCI Host Bridge) MPU/local bus interface function,
implemented by the Hawk ASIC
– All on-board PCI devices
– The PMC slot
Figure 3-1 on page 3-4).
Block Diagram
3
3-23