Features
◆ High performance 64-bit microprocessor, based on the
RISCore4000
– Minimized branch and load delays, through streamlined
5-stage scalar pipeline.
– Single and double precision floating-point unit
– 125 peak MFLOP/s at 250 MHz
– 330 Dhrystone MIPS at 250 MHz
– Flexible RC4700-compatible MMU
– Joint TLB on-chip, for virtual-to-physical address mapping
◆ On-chip two-way set associative caches
– 16KB instruction cache (I-cache)
– 16KB data cache (D-cache)
◆ Optional I-cache and D-cache locking (per set), provides
improved real-time support
◆ Enhanced, flexible bus interface allows simple, low-cost
design
– 64-bit Bus Interface option, 1000MB/s bandwidth support
– 32-bit Bus Interface option, 500MB/s bandwidth support
– SDRAM timing protocol, through delayed data in write cycles
– RC4000/RC5000 family bus-protocol compatibility
– Bus runs at fraction of pipeline clock (1/2 to 1/8)
◆ Implements MIPS-III Instruction Set Architecture (ISA)
◆ 3.3V core with 3.3V I/O
◆ Software compatible with entire RISController Series of
Embedded Microprocessors
◆ Industrial temperature range support
◆ Active power management
– Powers down inactive units, through sleep-mode feature
◆ 100% pin compatibility between RC64574, RC64474 and
RC4640
◆ 100% pin compatibility between RC64575, RC64475 and
RC4650
◆ RC64474 available in 128-pin QFP package, for 32-bit only
systems
◆ RC64475 available in 208-pin QFP package, for full 64/32 bit
systems
◆ Simplified board-level testing, through full Joint Test Action
Group (JTAG) boundary scan
◆ Windows® CE compliant