LC5822

Ordering number : EN5944 CMOS IC LC5824, LC5823, LC5822 4-Bit Single-Chip Microcontrollers Featuring 4 KB to 8 KB of ROM, 1 Kbit of RAM, and an LCD Driver for Medium Speed Small-Scale Control Applications Overview The LC5822, LC5823, and LC5824 are CMOS microcontrollers that feature the low-voltage operation required for battery-power applications and that provide 4 KB, 6 KB, or 8 KB of ROM, 1 kilobit of RAM, and an LCD driver. These microcontrollers support an instruction set based on that of the earlier LC5800, LC5812, and LC5814 for excellent efficiency in software development. Features These microcontrollers are high-end versions of the LC5800 and provide the following features. Low Current Drain * In halt mode (typical) Ceramic oscillator 400 kHz (3.0 V) 200 µA Crystal oscillator 32 kHz (1.5 V, Ag specifications) 3.0 µA (LCD biases other than 1/3) 4.5 µA (LCD drive: 1/3 bias) Crystal oscillator 32 kHz (3.0 V, Li specifications) 2.0 µA (LCD biases other than 1/3) 6.0 µA (LCD drive: 1/3 bias) Timer and Counter Functions One 8-bit programmable timer (May be used as an event counter) One 8-bit programmable reload timer Time base timer (for clocks) Watchdog timer 8-bit serial I/O (3-pin synchronous system) Standby Functions Clock standby function (halt mode) Only the oscillator circuits, the divider circuit, and the LCD driver operate. All other internal operations are stopped. This provides a power-saving function in which current drain is minimized, ...