DESCRIPTION
The ACT 7000SC is a highly integrated symmetric superscalar microprocessor capable of issuing two instructions each processor cycle. It has two high performance 64-bit integer units as well as a high throughput, fully pipelined 64-bit floating point unit. To keep its multiple execution units running efficiently, the ACT 7000SC integrates not only 16KB 4-way set associative instruction and data caches but backs them up with an integrated 256KB 4-way set associative secondary as well. For maximum efficiency, the data and secondary caches are writeback and nonblocking. A RM52XX family compatible, operating system friendly memory
management unit with a 64/48-entry fully associative TLB and a high-performance 64-bit system interface supporting hardware prioritized and vectored interrupts round out the main features of the processor.

FEATUREs
■ Full militarized QED RM7000 microprocessor
■ Dual Issue symmetric superscalar microprocessor with instruction prefetch optimized for system level price/performance
  ●150, 200, 210, 225 MHz operating frequency Consult Factory for latest speeds
  ● MIPS IV Superset Instruction Set Architecture
■ High performance interface (RM52xx compatible)
  ● 600 MB per second peak throughput
  ● 75 MHz max. freq., multiplexed address/data
  ● Supports 1/2 clock multipliers (2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9)
  ● IEEE 1149.1 JTAG (TAP) boundary scan
■ Integrated primary and secondary caches - all are 4-way set associative with 32 byte line size
  ● 16KB instruction
  ● 16KB data: non-blocking and write-back or write-through
  ● 256KB on-chip secondary: unified, non-blocking, block writeback
■ MIPS IV instruction set
  ● Data PREFETCH instruction allows the processor to overlap cache miss latency and instruction execution
  ● Floating point combined multiply-add instruction increases performance in signal processing and graphics applications
  ● Conditional moves reduce branch frequency
  ● Index address modes (register + register)
■ Embedded supply de-coupling capacitors and additional PLL filter components
■ Integrated memory management unit (ACT52xx compatible)
  ● Fully associative joint TLB (shared by I and D translations)
  ● 48 dual entries map 96 pages
  ● 4 entry DTLB and 4 entry ITLB
  ● Variable page size (4KB to 16MB in 4x increments)
■ Embedded application enhancements
  ● Specialized DSP integer Multiply-Accumulate instruction, (MAD/MADU) and three-operand multiply instruction (MUL/U)
  ● Per line cache locking in primaries and secondary
  ● Bypass secondary cache option
  ● I&D Test/Break-point (Watch) registers for emulation & debug
  ● Performance counter for system and software tuning & debug
  ● Ten fully prioritized vectored interrupts - 6 external, 2 internal, 2 software
  ● Fast Hit-Writeback-Invalidate and Hit-Invalidate cache operations for efficient cache management
■ High-performance floating point unit - 600 M FLOPS maximum
  ● Single cycle repeat rate for common single-precision operations and some double-precision operations
  ● Single cycle repeat rate for single-precision combined multiply add operations
  ● Two cycle repeat rate for double-precision multiply and double-precision combined multiply-add operations
■ Fully static CMOS design with dynamic power down logic
  ● Standby reduced power mode with WAIT instruction
  ● 4 watts typical @ 2.5V Int., 3.3V I/O, 200MHz
■ 208-lead CQFP, cavity-up package (F17)
■ 208-lead CQFP, inverted footprint (F24), with the same pin rotation as the commercial QED RM5261