Artesyn MVME51005E SBC Installation and Use (July 2014) - Manual (Page 70)

Functional Description
MVME51005E Single Board Computer Installation and Use (6806800A38D) 72
The Write Protect function provides a hardware method of protecting certain boot sectors. If
the system asserts V IL (low signal) on the WP#/ACC pin, the device disables the program and
erase capability, independently of whether those sectors were protected or unprotected using
the method described in the Sector/Sector Block Protection and Unprotection of the AMD
datasheet. The two outermost 8Kbyte boot sectors are the two sectors containing the lowest
addresses in a bottom-boot-configured device, or the two sectors containing the highest
addresses in a top-boot-configured device.
The aforementioned implemented device (at the time of this printing is the only qualified Flash
device used on this product) is a top-boot device, and as such, the write protected area is in the
upper 16KB of each device. Since it uses 4 devices for the soldered Flash bank, the write
protected region corresponds to the upper 64KB of the soldered Flash memory map. Thus the
address range of $F4FF 0000 to F4FF FFFF is the write protected region when the J16 header is
jumpered across pins 2 and 3.
If PPCBug tries to write to those write-protected address areas when pins 2-3 on J16 are set, the
command will simply not finish (i.e., erase sector function stops at $F4FF 0000).
4.3.4.2 ECC SDRAM Memory
The MVME5100’s on-board memory and optional memory mezzanines allow for a variety of
memory size options. Memory size can be 64 or 512MB for a total of 1.5GB on-board and
mezzanine ECC memory. The memory is controlled by the hardware which provides single-bit
error correction and double-bit error detection (ECC is calculated over 72-bits).
Either 1 or 2 mezzanines can be installed. Each mezzanine will add 1 bank of SDRAM memory
of 256 or 512MB. A total of 1GB of mezzanine memory can be added. Refer to
Chapter 5,
RAM500 Memory Expansion Module , for more information.
4.3.5 P2 Input/Output (I/O) Modes
The MVME5100 has two P2 I/O modes (SBC and PMC) that are user- configurable with jumpers
on the board (J6 and J20). The jumpers route the on-board Ethernet port 2 to row C of the P2
connector. Ethernet jumpers (J4, J10, and J17) should also be configured.