MOTLoad Firmware Package User's Manual - Bustec

Chapter 4 Functional DescriptionProcessorThe MVME6100 supports the MPC7457 with adjustable core voltage supply. The maximumexternal processor bus speed is 133 MHz. The processor core frequency runs at 1.267 GHz orthe highest speed MPC7457 can support, which is determined by the processor core voltage,the external speed, and the internal VCO frequency. MPX bus protocols are supported on theboard. The MPC7457 has integrated L1 and L2 caches (as the factory build configuration) andsupports an L3 cache interface with on-chip tags to support up to 2MB of off-chip cache. +2.5Vsignal levels are used on the processor bus.L3 CacheThe MVME6100 external L3 cache is implemented using two 8Mb DDR SRAM devices. The L3cache bus is 72-bits wide (64 bits of data and 8 bits of parity) and operates at 211 MHz. The L3cache interface is implemented with an on-chip, 8-way, set-associative tag memory. Theexternal SRAMs are accessed through a dedicated L3 cache port that supports one bank ofSRAM. The L3 cache normally operates in copyback mode and supports system cachecoherency through snooping. Parity generation and checking may be disabled by programmingthe L3CR register. Refer to the PowerPC Apollo Microprocessor Implementation DefinitionBook IV listed in Appendix C, Related Documentation.System ControllerThe MV64360 is an integrated system controller for high performance embedded controlapplications. The following features of the MV64360 are supported by the MVME6100:The MV64360 has a five-bus architecture comprised of:■■■■A 72-bit interface to the CPU bus (includes parity)A 72-bit interface to DDR SDRAM (double data rate-synchronous DRAM) with ECCA 32-bit interface to devicesTwo 64-bit PCI/PCI-X interfacesIn addition to the above, the MV64360 integrates:■■■■■■Three Gigabit Ethernet MACs (only two are used on the MVME6100)2Mb SRAMInterrupt controllerFour general-purpose 32-bit timers/countersI 2 C interfaceFour channel independent DMA controllerMVME6100 Installation and Use (V6100A/IH2) 37