Motorola manual EEPROMs on the MVME1X7P, Model Sockets Banks

Models: MVME1X7P

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Programming Issues

As a general rule, any master can access any slave; not all combinations pass the common sense test, however. Refer to the device-specific sections of this manual and to the user’s guide for each device to determine its port size, data bus connection, and any restrictions that apply when accessing the device.

EEPROMs on the MVME1X7P

Both boards include 44-pin PLCC/CLCC sockets for EEPROMs, organized as follows:

Model

Sockets

Banks

 

 

 

MVME167

4

2

 

 

 

MVME177

2

1

 

 

 

The MVME167P boards use 27C102JK or 27C202JK type EEPROMs. The MVME177 boards use SGS-Thompson M27C4002 (256K x 16) or AMD 27C4096 type EEPROMs.

The EEPROMs are organized as 32-bit wide banks that support 8-, 16-, and 32-bit read accesses. (The MVME177 has Flash memory in addition to EEPROM.)

MVME167

The EEPROMs are mapped to Local Bus address 0 following a Local Bus reset. This allows the MC68040 to access the stack pointer and execution address following a reset. The EEPROMs are controlled by the VMEchip2 ASIC. The map decoder, the access time, and the time they appear at address 0 are programmable parameters. Refer to Chapter 2, VMEchip2 for more detail.

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Motorola manual EEPROMs on the MVME1X7P, Model Sockets Banks