UPD30121

DATA SHEET MOS INTEGRATED CIRCUIT µPD30121 VR4121 64-/32-BIT MICROPROCESSOR TM The µPD30121 (VR4121) is one of NEC’s VR SeriesTM RISC (Reduced Instruction Set Computer) microprocessors and is a high-performance 64-/32-bit microprocessor employing the MIPS TM RISC architecture. The VR4121 uses the high-performance, super power-saving VR4120TM as the CPU core, and has many peripheral functions such as a DMA controller, software modem interface, serial interface, keyboard interface, IrDA interface, touch panel interface, real-time clock, A/D converter, and D/A converter. Configured with these functions, the VR4121 is suitable for high-speed battery-driven portable information systems. The external memory bus width can be selected from 32 bits and 16 bits, realizing high-speed data transfer. Detailed function descriptions are provided in the following user’s manual. Be sure to read it before designing. VR4121 User’s Manual (U13569E) DESCRIPTION FEATURES Employs 64-bit MIPS architecture Conforms to MIPS III instruction set (deleting FPU, LL, LLD, SC, and SCD instructions) Optimized 6-stage pipeline Supports MIPS16 instruction set Supports high-speed product-sum operation instructions Supports four types of operating modes, enabling more effective power-consumption management Internal maximum operating frequency: 131/168 MHz On-chip clock generator Address space physical: 32 bits virtual: 40 bits Integrates 32 double entry TLBs High-capacity instruction...