Overview
The LC7233N is a single-chip microcontroller that incorporates a 0.5 to 150 MHz phase-locked loop (PLL) and a liquid-crystal display (LCD) driver, making it ideal for digital tuners. It has a large number of input/output ports and a frequency measurement circuit.
The LC7233N features on-chip RAM and ROM, a programmable high-speed divider, a 6-bit analog-to-digital converter and a low-voltage detection reset circuit.
The LC7233N operates from a 5 V supply and is available in 64-pin QIPs.

Features
• 0.5 to 150 MHz phase-locked loop.
• LCD driver.
• 6-bit analog-to-digital converter.
• Two 8-bit PWM digital-to-analog converters.
• Two 4-bit input ports.
• Two 4-bit input/output ports.
• 6-bit keypad matrix scan output port.
• 2-bit open-drain high-voltage output port.
• 23 mask-selectable output drivers.
• 20-bit universal counter.
• 4096 × 16-bit program ROM (001H to FFFH user addressable memory).
• 256 × 4-bit data RAM.
• Low-voltage detection reset circuit.
• Programmable high-speed divider.
• Single-word instructions.
• Four-level stack.
• PLL-unlocked flip-flop.
• Timer flip-flop.
• External interrupt.
• Programmable watchdog interrupt address.
• Standby mode.
• CPU operates down to 3.5 V and retains data down to 1.3 V.
• 5 V supply.
• 64-pin QIP.