Features - Motorola MVME297-002 User Manual

General Information
1
N
ote
The BusSwitch ASIC provides an interface between the processor bus
(MC88110/410 bus) and the local peripheral bus (MC68040 compatible bus).
Refer to the board specific MVME197 block diagram. It provides bus
arbitration for the MC88410 bus and serves as a seven level interrupt handler.
It has programmable map decoders for both busses, as well as write post
buffers on each, two tick timers, and four 32-bit general purpose registers.
The DCAM (DRAM Controller and Address Multiplexer) ASIC provides the
address multiplexers and RAS/CAS/WRITE control for the DRAM as well as
data control for the ECDM.
The ECDM (Error Correction and Data Multiplexer) ASIC multiplexes
between four data paths on the DRAM array. Since the device handles 16 bits,
four such devices are required on the MVME197 to accommodate the 64-bit
data bus of the MC88110 microprocessor. Single-bit error correction and
double-bit detection is performed in the ECDM.
The PCCchip2 (Peripheral Channel Controller) ASIC provides two tick timers
and the interface to the LAN chip, the SCSI chip, the serial port chip, the
printer port, and the BBRAM (Battery Backup RAM).
The VMEchip2 ASIC provides a VMEbus interface. The VMEchip2 includes
two tick timers, a watchdog timer, programmable map decoders for the master
and slave interfaces, and a VMEbus to/from the local peripheral bus DMA
controller, a VMEbus to/from the local peripheral bus non-DMA
programmed access interface, a VMEbus interrupter, a VMEbus system
controller, a VMEbus interrupt handler, and a VMEbus requester.
The local peripheral bus to VMEbus transfers can be D8, D16, or D32.
VMEchip2 DMA transfers to the VMEbus, however, can be 64 bits wide as
Block Transfer (BLT).

Features

These are some of the major features of the MVME197DP/SP single board
computers:
Single MC88110 RISC Microprocessor with an MC88410 Cache Controller
(MVME197SP module series only)
1-2
For the MVME197 series, the term Local Bus, as used in
other MVME1xx Single Board Computers, is referred to as
the Local Peripheral Bus.
User's Manual