Cpu Options; Memory; Dram/Flash - PEP VM162 User Manual

VM162/VM172

2.2 CPU Options

By supporting several types of CPUs the VM162/VM172 provides scalable computing power at optimi-
zed costs.
The CPU types differ in performance, power requirement and supported functions. Optional on-chip
functions are Memory Management Unit (MMU) and Floating Point Unit (FPU).
There are three categories of VM162/VM172 CPU boards. At the top there is the 68060 CPU board
which offers 2 to 3 times performance of a the following 68040 CPU board. At the low end there is the
CPU 68040V board which is the low cost and also low power version.
The Table below summerizes the differences between the CPU versions:
Table 2.1: CPU Options
Freq
CPU Type
MHz
68060 50
68040 33
68040V 33
68060 66
Note: Performance data based on the same test for all CPU versions of the VM162/VM172 is intended
to demonstrate the performance ratio between them.
The above measurements have been made under the OS-9 operating system version 3.0 with the Ultra-
C compiler version 1.3.1.

2.3 Memory

2.3.1 DRAM/FLASH

DRAM and FLASH memory is combined on a piggyback with addressing capabiltity for up to 64 MBy-
tes each. It provides a fast 32 bit data access with DRAM Burst support. It provides also in-system
FLASH programming facility, thus ROM upgrades are easy and cost-effective by simply overwriting
existing stored data in FLASH. Hardwired write protection of FLASH can be optionally selected by
jumper.
The Table on the following page summarizes the variety of DRAM/FLASH modules present available
(refer also to the Memory Piggybacks Appendix). Please consult your sales representative for other pos-
sible applications.
Page 2- 4
Chapter 2 Functional Description
Integer
MMU FPU Performance
( Dhrystone )
yes yes 133779
yes yes 61255
yes no 61255
yes yes TBD
© PEP Modular Computers
Floating Point
Performance
( Wheatstone )
18.28 high performance
9.43 standard
- lower cost/low power
TBD planned
Juli 23, 1997