TC9318FA

The TC9318FA is a 4bit CMOS microcontroller for signal chip digital tuning systems. It is capable of functioning at a low voltage of 3V and features a built-in prescaler of operating 230MHz, PLL and LCD drivers.The CPU has Obit parallel addition and subtraction instructions (e.g., AI, SI), logic operation instructions (e.g., OR, AND), composite judging and compare instructions (e.g., TM, SL), and time-base functions.

Features of the TC9318FA are:(1)4bit microcontroller for digital tuning systems; (2)features built-in 1 /3-duty, 1/2-bias LCD drivers and a built-in 3V booster circuit for the display; (3)data memory (RAM) and ports are easily backed up; (4)program memory (ROM):16bit x 4096 steps; (5)Data memory (RAM):4bit x 256 words; (6)62-instruction set (all one-word instructions); (7)many addition and subtraction instructions (12 types addition,12 types subtraction); (8)powerful composite judging instructions (TMTR, TMFR, TMT,TMF, TMTN, TMFN); (9)data can be transmitted between addresses on the same row(MVSR instruction).The package is an pin 64, 0.5/0.65-mm-pitch quad flat pack package. In addition to various input/output ports and a dedicated key-input port, which are controlled by powerful input/output instructions (IN 1,2, OUT 1,2),there are many dedicated LCD pins, a buzzer port, a 6bit A/D converter, an IF counter, and other pins.Low-voltage and low-current consumption make this microcontroller suitable for portable DTS equipment.

The absolute maximum ratings of the TC9318FA can be summarized as:(1)supply voltage:-0.3 to 4.0 V;(2)input voltage:-0.3 to Vdd+0.3V;(3)storage temperature:-55 to 125;(4)power dissipation:100mW;(5)operating temperature:-10 to 60.Program Counter is a block to designate the address of program memory (ROM), and is composed of 12 bits binary up counter. This is cleared by system reset, and the program starts from zero address.Usually, it's increment is made one by one everytime the one instruction is executed, but when JUMP instruction or CAL instruction is executed, the address designated at operand part of that instruction is loaded.Further, when the instruction (AIS, SLTI, TMT, RNS instructions, etc.) having skip function is executed, two increments of program counter is made if the result is the condition to be skipped, and the succeeding instruction is skipped.