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)
|