Owner manual

VM162/VM172 Chapter 2 Functional Description

Page 2- 4

Juli 23, 1997

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

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.

CPU Type

Freq

MHz

MMU FPU

Integer

Performance

(

Dhrystone

)

Floating Point

Performance

(

Wheatstone

)

68060 50 yes yes 133779 18.28 high performance

68040 33 yes yes 61255 9.43 standard

68040V 33 yes no 61255 - lower cost/low power

68060 66 yes yes TBD TBD planned