Vpd And User Configuration Eeproms; Temperature Sensor; Flash Memory; Pci Arbitration Assignments - Motorola MVME5500 Programmer's Reference Manual

Programming Details

VPD and User Configuration EEPROMs

2

Temperature Sensor

Flash Memory

PCI Arbitration Assignments

2-14
The MVME5500 board contains an Atmel AT24C64 vital product data
(VPD) EEPROM containing configuration information specific to the
board. Typical information that may be present in the VPD is:
manufacturer, board revision, build version, date of assembly, memory
present, options present, L3 cache information, etc. A second AT24C64
device is available for user data storage.
The MVME5500 board contains a Maxim DS1621 digital temperature
sensor with an I2C serial bus interface. This device may be used to provide
a measure of the ambient temperature of the board.
The MVME5500 contains two banks of Flash memory accessed via the
device controller contained within the GT-64260B. Flash 1 consists of two
soldered 32Mb devices (E28F320J3A) to give a minimum of 8MB Flash
memory. Flash 0 consists of two Intel StrataFlash 3.3 volt devices,
configured to operate in 16-bit mode, to form a 32-bit Flash port. This bank
contains 64Mb devices (E28F128J3A) for 32MB of Flash.
There is a Flash boot bank select jumper on board, which selects either
Flash 0 or Flash 1 as the boot bank. No jumper or a jumper installed
between pins 1 and 2 selects Flash 0 as the boot bank. A jumper installed
between pins 2 and 3 selects Flash 1 as the boot bank.
PCI arbitration for PCI Bus 0.0 and PCI Bus 1.0 is handled using logic
implemented in PLDs. These arbiters use a rotating priority scheme for
fairness and bus parking will always be on the GT-64260B. There are no
software programmable modes to these arbiters.
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