TC9309AF

The TC9309AF is a Obit CMOS microcontroller for single chip digital tuning system with built-in prescaler, PLL and LCD driver.The CPU has Obit parallel addition/subtraction (AI, SI instructions, etc.) logical operation (OR, AN instructions, etc.) multiple bits judgment, comparison instructions (TM,SL instructions, etc.) and time base functions.The TC9309AF is housed in as 80pin mini-flat package and is provided with ample I/O ports and exclusive key input ports which are controlled by powerful I/O instructions (10, KEY instruction, etc.) and 1/2 duty and 1/2 bias driving ample LCD use exclusive output terminals.

Features of the TC9309AF are:(1)4bit microcontroller for single-chip digital tuning system; (2)5V±10% single power supply, CMOS structure with low power dissipation; (3)built-in prescaler (Max. 140MHz signal is directly input in FM band), PLL and LCD driver (1/2 d uty,1/2 bias, frame frequency:100Hz, 64 segments); (4)easy backup of data memory (RAM) and various ports (by the INH terminal); (5)program memory (ROM):16 bits x 1024 steps; (6)data memory (RAM):4 bits x 256 words; (7)61 kinds of powerful instruction sets (all are single-word instructions).In addition, the TC9309AF has built in 2 modulus prescaler, PLL circuit, and IF counter that counts intermediate frequency (IF) in FM and AM bands for detecting broadcasting stations.Furthermore, the TC9309AF has built in serial bus control function {S10 instruction) to powerfully control peripheral ICs, 6bit A/D converter and D/A converter that are usable for field strength measurement and electronic volume control, and provides with many functions needed for digital tuning system.

The absolute maximum ratings of the TC9309AF can be summarized as:(1)power supply voltage:-0.3 to 7.0 V;(2)input voltage:-0.3 to Vdd+0.3V;(3)storage temperature:-65 to 150;(4)power dissipation:400mW;(5)operating temperature:-40 to 85.Connect a 7.2MHz crystal resonator to the crystal oscillator terminal (XT,XT terminal) of a device as illustrated below. This oscillation signal is supplied to the clock generator and the reference frequency divider for generating various CPU timing signals and reference frequency signals. Adjust crystal oscillation frequency while monitoring segment output terminal.However, no initialization of output ports and internal ports (G-Register, etc.) is performed. In particular, contents of these ports become indefinite when the power source is initially turned on and therefore, it becomes necessary to initialize them programmatically as necessary.