DTS MICROCONTROLLLER (DTS-21)

The TC9317F is a 4bit CMOS microcontroller for digital tuning systems. It is capable of functioning at a low voltage of 3V and feature a built-in PLL and LCD drivers.
The CPU has 4bit parallel addition and subtraction instructions (e.g., Al, Sl), logic operation instructions (e.g., OR, AND), composite judging and compare instructions (e.g., TM, SL), and time-base functions.