Ecc Memory; P2 I/O Modes - Motorola MVME5100 Programmer's Reference Manual

ECC Memory

The on-board and optional memory mezzanines allow a variety of memory
size options; i.e., memory size can be 32MB, 64MB, 128MB, 256MB, or
512MB for a total of up to 1GB of planar and mezzanine ECC memory.
The SDRAM memory is controlled by the Hawk ASIC, which provides
single-bit error correction and double-digit error detection. ECC is
calculated over 72-bits. Refer to the Hawk portion of this manual
(Chapters 2 and 3) for additional programming information.
Memory block size is dependent upon the SDRAM devices installed.
Installing five 64 Mbit (16-bit data) devices provide 32MB of memory.
With 64 Mbit (8-bit data) devices, each block consists of 9 devices that
total 64MB per block. With 128 Mbit (8-bit data) devices, a block can be
populated for 128MB. With 256 Mbit (8-bit data) devices, a block can be
populated for 256MB.
When populated, the planar memory blocks appear as Block A and
Block B to the Hawk. The optional mezzanine memory blocks appear as
Block C and Block E to the Hawk.
The optional memory mezzanine can configure the planar local bus
frequency upon power-up. This will reduce the planar local bus frequency
of 100 MHz to 83.33 MHz when mezzanines are used. Either one or two
mezzanines can be installed. Each mezzanine will add one bank of
SDRAM memory of either 32MB, 64MB, 128MB, or 256MB. A total of
512MB of mezzanine memory can be added.
Refer to the MVME5100 Single Board Computer Installation and Use
manual for installation and configuration instructions for the RAM500
memory mezzanine board, and refer to Chapters 2 and 3 of this manual for
additonal programming information on programming the memory
mezzanines using the Hawk ASIC.

P2 I/O Modes

The MVME5100 has two P2 I/O modes (SBC and PMC) that are user
configurable with 4 jumpers on the planar (refer to the jumper settings in
the MVME5100 Single Board Computer Installation and Use manual).
The jumpers route the on-board Ethernet Port 2 to Row C of the P2
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System Bus
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