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SCD4430 Rev A 11/18/96

3.0 Electrical Features

• Low power dissipation, 3.3 Volt powered, 64 bit superpipelined RISC R4400 microprocessor

- Highly integrated CPU with integer unit, FPA, MMU, I&D cache

- Balanced integer & floating point performance

- Exploits 2-level instruction-level parallelism

- No issue restrictions on the instructions used

• Integer unit

- 32 entry, 64 bit wide register

- ALU

- Dedicated multiplier/divider

• Super pipelined FPA

- 32/16 entry 32/64 bit register file in a 32 bit mode

- 32 entry 64 bit register file in 64 bit mode

- Supports single and double precision.

- Supports ANSI/IEEE Standard 754-1985

• Memory management unit

- 48 entry TLB for fast virtual-to-physical address translation, software managed cntrl regstrs

- Programmable page sizes from 4K bytes to 16M bytes

- Total physical address space encompasses 64G bytes

- One pair of pages per TLB entry, each programable in size from 4K bytes to 16M bytes

• JTAG boundary scan capability for testing module interconnects.

• Internal 1M byte secondary cache SRAM configured as a split cache with instruction and data sections sepa-

rate. Can be factory configured as unified.

• Provides 16 bit ECC on secondary cache data line, 7 bit ECC on tag line.

• Minimum clock rate 50 mHz with no wait states.

• +3.3 Volt P.S.(10 Watts Max.power dissipation) operation is standard.

4.0 Mechanical Features

• Small sizes, 2.5”L X 1.75”W X 0.175”H, 280 pin surface mount flat package or alternate 1.86”LX 1.86”W X

0.145”H, 179 pin PGA Package.

• Full military operating temperature range of -55 °C to +125 °C, case temperature

• Designed to meet military specifications, manufactured and tested in Aeroflex’s MIL-PRF-38534 certified

facility.