UPD70741 Datasheet | NEC

DATA SHEET MOS INTEGRATED CIRCUIT µPD70741 V821TM 32-/16-BIT MICROPROCESSOR The µPD70741 (V821) is a 32/16-bit RISC microprocessor that uses, as its processor core, the highperformance 32-bit microprocessor µPD70732 (V810TM) designed for built-in control applications. It incorporates peripheral functions such as a DRAM/ROM controller, 2-channel DMA controller, real-time pulse unit, serial interface, and interrupt controller. The V821, which offers quick real-time response, high-speed integer instructions, bit string instructions, and floating-point instructions, is ideally suited to use in OA equipment such as printers and facsimiles, image processing devices such as those used in navigation units, portable devices, and other devices demanding excellent cost performance. The functions are described in detail in the following User’s Manuals, which should be read before starting design work. - V821 User’s Manual Hardware : U10077E TM - V810 Family User’s Manual Architecture : U10082E Features The V810 32-bit microprocessor is used as the CPU core - Separate address/data bus Address bus : 24 bits Data bus : 16 bits - Built-in 1-Kbyte instruction cache memory - Pipeline structure of 1-clock pitch - Internal 4-Gbyte linear address space - 32-bit general-purpose registers: 32 Instructions ideal for various application fields - Floating-point operation instructions and bit string instructions Interrupts controller - Nonmaskable : 1 external input - Maskable : 8 external inputs and 11 types of internal sources - Priorities can be specified in units of four groups. Wait control unit - Capable of CS control over four blocks in both memory and I/O spaces. - Linear address space of each block: 16M bytes Memory access control functions - Supports DRAM high-speed page mode. - Supports page-ROM page mode. DMA controller (DMAC): 2 channels - Maximum transfer count: 65 536 - Two transfer types (fly-by (1-cycle) transfer and 2-cycle transfer) - Three transfer modes (single...