XPC755

The XPC755 is a kind of RISC microprocessor.It consists of a processor core and an internal L2 Tag combined with a dedicated L2 cache interface and a 60x bus.

There are some features of XPC755 as follows.First is branch processing unit which includes four instructions fetched per clock, one branch processed per cycle (plus resolving 2 speculations), up to 1 speculative stream in execution, 1 additional speculative stream in fetch, 512-entry branch history table (BHT) for dynamic prediction, 64-entry, 4-way set associative Branch Target Instruction Cache (BTIC) for eliminating branch delay slots.The second is dispatch unit including full hardware detection of dependencies (resolved in the execution units), dispatch two instructions to six independent units (system, branch, load/store, fixed-point unit 1, fixed-point unit 2, floating-point) and serialization control (predispatch, postdispatch, execution serialization).Then is Fixed Point Units (FXUs) that share 32 GPRs for integer operands.Next is floating-point unit and a 32-entry FPR file.And so on.

What comes next is the absolute maximum ratings of XPC755.The core supply voltage (Vdd) is from -0.3 to 2.5 V.The PLL supply voltage (AVdd) is from -0.3 to 2.5 V.The L2 DLL supply voltage (L2AVdd) is from -0.3 to 2.5 V.The processor bus supply voltage (OVdd) is from -0.3 to 3.465 V.The L2 bus supply voltage (L2OVdd) -0.3 to 3.465 V.The input voltage (Vin) is from -0.3 to OVdd + 0.3 V for Processor bus, from 0.3 to L2OVdd + 0.3 V for L2 Bus and from -0.3 to 3.6 V for JTAG Signals.The storage temperature range (Tstg) is from -55 to 150.