MOTLoad Firmware Package User's Manual - Bustec

Chapter 4 Functional Descriptionserial EEPROM following a reset and initialize any number of internal registers. In the secondfunction, the controller is used by the system software to read the contents of the VPDEEPROM contained on the MVME6100 board, along with the SPD EEPROMs for on-boardmemory to further initialize the memory controller and other interfaces.The MVME6100 board contains the following I 2 C serial devices:■■■■■■8KB EEPROM for user-defined MV64360 initialization8KB EEPROM for VPD8KB EEPROM for user dataTwo 256 byte EEPROMs for SPDDS1621 temperature sensorOne 256 byte EEPROM for PMCspan PCIx-PCIx bridge useThe 8KB EEPROM devices are implemented using Atmel AT24C64A devices or similar parts.These devices use two byte addressing to address the 8KB of the device.Interrupt ControllerThe MVME6100 uses the interrupt controller integrated into the MV64360 device to managethe MV64360 internal interrupts as well as the external interrupt requests. The interrupts arerouted to the MV64360 MPP pins from on-board resources as shown in the MVME6100Programmer’s Guide. The external interrupt sources include the following:■■■■■■■■■■On-board PCI device interruptsPMC slot interruptsVME interruptsRTC interruptWatchdog timer interruptsAbort switch interruptExternal UART interruptsEthernet PHY interruptsIPMC761 interruptsPMCspan interruptsFor additional details regarding the external interrupt assignments, refer to the MVME6100Programmer’s Guide.MVME6100 Installation and Use (V6100A/IH2) 41