Kontron VMP2 - Manual (Page 36)

VMP2 Functional Description
ID 24855, Rev. 02 Page 2 - 8 © 2002 PEP Modular Computers GmbH
2.4.2 Memory
2.4.2.1 System Memory (DRAM)
The main memory of the VMP2 consists of SDRAM, ranging from 64 up to 256 MByte,
soldered onto the board for mechanical stability.
The VMP2 provides ECC support (optional) and a maximum memory speed of 132 MHz.
2.4.2.2 Flash
4 or 8 MB of soldered Flash memory accommodate the bootstrap loader software and
can be used to store ROMable operating systems or user data. This Flash memory is 8-
bit wide and windowed with window sizes of 512 kB.
2.4.2.3 EEPROM
A serial EEPROM is provided, organised into 8 blocks with 256 bytes per block
(24LC16). This EEPROM is connected to the I2C bus provided by the MPC8245.
2.4.2.4 Memory Expansion Socket (DIL600)
The VMP2 provides one 32-pin DIL socket on which to place SRAM, non-volatile SRAM
or other DIL600 devices on the board. Access to this Memory is controlled by the
onboard logic.
The following devices may be added to the VMP2 via the 32-pin DIL600 socket:
• Standard Flash memory of up to 512 kB, for example, the AMD29F010 and
AMD29F040
• The NV SRAM from Dallas Semiconductor. These devices are available in the
temperature range –40°C to +85°C for the industrial environment and guarantee
a minimum data retention of 10 years (e.g. DS1250Y-100).
• Disk-on-chip Flash memory. In order to achieve flexibility with low cost, the VMP2
Flash disk is not soldered but connected via a special module from M-Systems
(Disk-on-Chip 2000) which comes in the following sizes:
2 - 24 MB (dimensions 41.7 x 17.9 x 5.6mm);
4 - 144 MB (dimensions 42.0 x 18.3 x 11.8mm).