CLOCK GENERATION INTEGRATED CIRCUIT AND SYSTEM BOARD

PROBLEM TO BE SOLVED: To provide a clock generation IC (integrated circuit) for a PC capable of easily generating a clock of a desired frequency without user having to make a parameter calculation and displaying an actual frequency value of a clock obtained by setting at the outside to enable the user to confirm the actual frequency value, and to provide a system board mounted with the clock generation IC. SOLUTION: In a PC motherboard, a clock generator 7 is provided with a frequency conversion table 22 between a register 21 included in an IF 16 for communication and respective frequency dividing circuits 17, 19 and 12 to 15. The user can generate a clock of a desired frequency only by setting the desired frequency because the frequency conversion table 22 has a function for outputting the values of parameters M, N and K needed to generate clocks of corresponding frequencies on the basis of data corresponding to the frequencies of clocks when data are inputted. COPYRIGHT: (C)2004,JPO