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4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

The μPD17933 and 17934 are 4-bit single-chip CMOS microcontrollers with hardware for digital tuning systems (DTSs).

These microcontrollers integrate a prescaler that operates at a voltage as low as 1.05 V and up to 220 MHz, a PLL frequency synthesizer, an intermediate frequency (IF) counter, and an LCD controller/driver on a single chip.

Therefore, a high-performance digital tuning system for a portable set can be organized with a single chip.

FEATURES

? Program memory (ROM)

μPD17933 : 12K bytes (6144 × 16 bits)

μPD17934 : 16K bytes (8192 × 16 bits)

? General-purpose data memory (RAM) )

448 × 4 bits

? Instruction execution time

53.3 μs (with 75-kHz crystal resonator)

? PLL frequency synthesizer

Dual modulus prescaler (220 MHz MAX.),

programmable divider, phase comparator,

charge pump

? Peripheral hardware

General-purpose I/O ports, LCD controller/driver,

serial interface, A/D converter, BEEP output,

frequency counter

? Interrupt

External: 1 source

Internal : 3 sources

? Reset by RESET pin

? Low power consumption

? Supply voltage: VDD = 1.05 to 1.8 V