Flash Memory - Motorola MBX Series Installation And Use Manual

Functional Description

Flash Memory

5
5-10
EDO (extended data out)
Up to 4K refresh
Expansion DRAM cannot exceed 128MB and should also support CAS
before RAS refresh.
Flash memory on the MBX series embedded controller consists of 2MB,
4MB, or 8MB of memory in one bank of four devices soldered directly to
the board. The EPPCBug firmware resident in Flash memory is originally
loaded at the factory, but the Flash contents can be reprogrammed if
necessary.
The on-board monitor/debugger, EPPCBug, resides in Flash memory. The
EPPCBug firmware provides functionality for:
Booting and resetting the system
Initializing a request
Displaying and modifying configuration variables
Running self-tests and diagnostics
Updating firmware ROM
For purposes of reprogramming Flash, the MBX includes a 32-pin socket
(XU1) in which firmware programmers can install a removable boot ROM
device. A jumper header (J4) enables you to select either the on-board
Flash memory or the socketed Flash chip in XU1 as the boot ROM.
Depending on the configuration of J4, resets execute either from the on-
board Flash memory bank (32-bit Flash) or from the socketed ROM (8-bit
Flash).
Flash contents may be modified by executing the proper program
command sequence. Refer to the third-party data sheet and/or to the
EPPCBug Firmware Package User's Manual for further information on
modifying Flash contents.
Computer Group Literature Center Web Site