Flash Memory; Ram200 Memory Module - Motorola MVME2600 series Installation And Use Manual

Functional Description
3

Flash Memory

RAM200 Memory Module

3-20
The Raven bridge controller ASIC provides the bridge between the
PowerPC microprocessor bus and the PCI local bus. Electrically, the
Raven chip is a 64-bit PCI connection. Four programmable map decoders
in each direction provide flexible addressing between the PowerPC
microprocessor bus and the PCI local bus.
The MVME2603/2604 base board has provision for 1MB of 16-bit Flash
memory in two 8-bit sockets. The RAM200 memory mezzanine
accommodates 4MB or 8MB of additional 64-bit Flash memory.
The onboard monitor/debugger, PPCBug, resides in the Flash chips.
PPCBug provides functionality for:
Booting the operating system
Initializing after a reset
Displaying and modifying configuration variables
Running self-tests and diagnostics
Updating firmware ROM
Under normal operation, the Flash devices are in "read-only" mode, their
contents are pre-defined, and they are protected against inadvertent writes
due to loss of power conditions. However, for programming purposes,
programming voltage is always supplied to the devices and the Flash
contents may be modified by executing the proper program command
sequence. Refer to the third-party data sheet and/or to the PPCBug
Firmware Package User's Manual, listed in
Documentation, for further device-specific information on modifying
Flash contents.
The RAM200 is the ECC DRAM memory mezzanine module that
(together with an LED mezzanine and an optional PCI mezzanine card)
plugs into the base board to make a complete MVME2603 or MVME2604
single board computer. See
Appendix D, Related
Figure 1-18 on page 1-37.
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