LC72341G

Ordering number : EN*5799 CMOS IC LC72341G/W, LC72342G/W, LC72343G/W Low-Voltage Single-Chip Microcontrollers with OnChip PLL and LCD Driver Circuits Preliminary Overview The LC72341G/W, LC72342G/W, and LC72343G/W are single-chip microcontrollers with both a 1/4-duty 1/2-bias LCD driver circuit and a PLL circuit that can operate at up to 250 MHz integrated on the same chip. These ICs are ideal for use in portable audio equipment. Reference frequencies of 1, 3, 5, 6.25, 12.5, and 25 kHz can be provided. Input frequency range — FM band: 10 to 130 MHz 130 to 250 MHz — AM band: 0.5 to 15 MHz Functions High-speed programmable divider Program memory (ROM) — LC72341G/W: 2048 words × 16 bits (4KB) — LC72342G/W: 3072 words × 16 bits (6KB) — LC72343G/W: 4096 words × 16 bits (8KB) Data memory (RAM) — LC72341G/W: 128 words × 4 bits — LC72342G/W: 192 words × 4 bits — LC72343G/W: 256 words × 4 bits Instruction cycle time — 40 µs (for all single-word instructions.) Stack — 4 levels (LC72341G/W) — 8 levels (LC72342G/W, and LC72343G/W) LCD driver — 48 to 80 segments (1/4-duty 1/2-bias drive) Timer interrupts — One timer circuit providing intervals of 1, 5, 10, and 50 ms. External interrupts — One external interrupt (INT) A/D converter — Two channels (5-bit successive approximation) Input ports — 7 (Of which two can be switched to function as A/D converter inputs) Output ports — 6 (Of which one can be switched to function as the BEEP tone output. Two ports are open-d...