TC9328AF

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC9328AF Portable Audio DTS Controller (DTS-21) TC9328AF The TC9328AF is a single-chip DTS microcontroller for portable audio incorporating 230 MHz prescaller, PLL, and LCD driver. In addition to a 20-bit IF counter, 6-bit A/D converter, serial interface, and buzzer function, the device supports an interrupt function, 8-bit timer/counter, and 8-bit pulse counter. The LCD driver features built-in 1/4 duty, 1/2 bias and a 3 V voltage doubler boosting circuit, implementing stable LCD. The power supply voltage ranges from 0.9 to 1.8 V. Because of its low-current consumption (CPU: 80 µA (max)), the device is suitable for use in digital tuning systems in portable equipment such as headphone stereos. Features Weight: 0.45 g (typ.) CMOS DTS microcontroller LSI with built-in 230 MHz prescaller, PLL, and LCD driver Operating voltage: VDD = 0.9 to 1.8 V (typ.: 1.5 V) Current dissipation: When CPU in operation: IDD = 40 µA (typ.) When PLL in operation: IDD = 6 mA (typ.) (VHF mode) Operating temperature range: Ta = −10 to 60°C Program memory (ROM): 16-bit × 8192 steps Data memory (RAM): 4-bit × 512 words Instruction execution time: 40 µs Crystal oscillator frequency: 75 kHz Stack level: 8 General-purpose IF counter: 20-bit (CMOS input supported) A/D converter: 6-bit × 4 channel LCD driver: 1/4 duty, 1/2 bias, 88 segments (max) I/O port: CMOS I/O ports: 12 N-channel open drain I/O ports: 24 (max) Outp...