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.