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DESCRIPTION

The μPD178023, 178024 are 8-bit single-chip CMOS microcontrollers containing hardware for digital tuning systems.

These microcontrollers employ a 78K/0 series architecture CPU and allow easy access to internal memories at high speed and easy control of peripheral hardware units. The high-speed 78K/0 series instructions are ideal for system control.

As peripheral hardware, a prescaler, PLL frequency synthesizer, and frequency counter for digital tuning systems are provided, as well as many I/O ports, timers, A/D converter, serial interface, and a power-ON clear circuit. In addition, three serial interfaces, I2C bus (IIC0), three-wire (SIO3), and UART are provided.

Moreover, a flash memory model, the μPD178F124, that operates in the same supply voltage range as the mask ROM models, and various development tools are also under development.

FEATURES

? High-capacity ROM and RAM

? Instruction cycle:

0.45/0.89/1.78/3.56/7.11 μs (with crystal resonator of

fX = 4.5 MHz)

? Many internal hardware units

General-purpose I/O ports, A/D converter, serial

interface (I2C bus and UART mode), timers, frequency

counter, power-ON clear circuit

? Hardware for PLL frequency synthesizer

Dual modulus prescaler, programmable divider,

phase comparator, charge pump

? Vectored interrupt sources: 17

? Supply voltage

:VDD = 4.5 to 5.5 V (during PLL and CPU operations)

:VDD = 3.5 to 5.5 V (during CPU operation)