Motorola manual MVME172 Version Register

Models: MVME172

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Programming Model

MVME172 Version Register

The contents of a PAL and the state of an 8-position jumper block are translated to bit settings of the General Purpose Inputs Register, Version Register and DRAM/SRAM Options Register when the MC2 chip is reset. These registers are read only. Writes to these registers are terminated without exception but do not change their contents.

3

ADR/SIZ

 

$FFF4202C (8 bits)

 

 

 

 

 

BIT

15

14 - 9

8

 

 

 

 

NAME

V7

V6 - V1

V0

 

 

 

 

OPER

R

R

R

 

 

 

 

RESET

 

Application Specific

 

 

 

 

 

V0

V0 and V4 indicated the speed of the processor and local

 

bus. Refer to the following table for the bit definitions.

 

 

 

 

 

 

 

V0

 

V4

Processor Type

Processor/Bus

 

 

 

 

Frequency

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

MC68LC060

50/25 **

 

 

 

 

 

 

 

0

 

 

MC68060

50/25 **

 

 

 

 

 

 

 

1

 

0

MC68LC060

64/32

 

 

 

 

 

 

 

1

 

1

MC68060

60/30

 

 

 

 

 

 

** No plans to productize this combination.

V1

V1 set to a one indicates that the VMEchip2 ASIC is not

 

present. V1 set to a zero indicates that a VMEbus interface

 

is present.

 

 

 

 

If V1 = 0, the MC2 chip reset logic and local bus access

 

timer are inhibited.

 

V2

V2 set to a one indicates that the SCSI interface is not

 

present. V2 set to a zero indicates that a SCSI interface is

 

present.

 

 

 

http://www.mcg.mot.com/literature

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Page 223
Image 223
Motorola manual MVME172 Version Register