LC5823 Datasheet | SANYO

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 k Hz (3.0 V) 200 µA - Crystal oscillator 32 k Hz (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 k Hz (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, and allows a clock function to be implemented easily with low power dissipation. Furthermore, low-speed and high-speed modes can be implemented by setting the operating modes of the two oscillator circuits. - Full standby function (hold mode) - Halt mode can be cleared by any of two external and two internal interrupts. Applications - LCD display in multi-function watches, timers, and other products - Control and LCD display in timers - Control and LCD display in miniature test equipment,...