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.

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 transfer, singlestep transfer, and block transfer)
● Serial interfaces : 2 channels
    • Asynchronous serial interface (UART): 1 channel
    • Synchronous serial interface (CSI): 1 channel
● Real-time pulse unit
    • 16-bit timer/event counter : 1 channel
    • 16-bit interval timer : 1 channel
● Watchdog timer functions
● Clock generator functions
● Standby functions (HALT, IDLE, and STOP modes)