MK3230

The MK3230 is the smallest size, lowest power system clock synthesizer available. MK3230 is the ideal way to generate clocks for portable computers, PDAs, and other devices where low power is required. Using analog Phase-Locked Loop (PLL) techniques, MK3230 operates from a single 32.768 kHz crystal to produce the 32.768kHz, CPU, system, keyboard controller, and floppy (or super I/O) controller output clocks.

MK3230 has two power down modes. From the CPU decoding table (when FS0, FS1, and FS2 all are low), the CPU and 14.3 MHz system clocks can be turned off. Also, the keyboard and 24 MHz peripheral clocks can be shut off from <a href="#" style="text-decoration:overline;">PD24+KBD</a> (pin 10). The part has a separate VDD32 pin for the 32 kHz clock, allowing MK3230 to run at a different voltage (down to 2.0V) from the rest of the chip, allowing it to run from a back-up