| 摘要 |
<P>PROBLEM TO BE SOLVED: To significantly reduce production cost by matching an external analog module with an internal analog module by the same controller. <P>SOLUTION: The controller 4 in this information processing system 1 includes switching parts 13-15 composed of fuses F1-F6. The fuses F1-F6 are optionally cut to perform switching between the external analog module (an external power supply circuit 5, an external power supply monitoring circuit 6, and a clock generating element 7) and the internal analog module (an internal power supply circuit 10, an internal power supply monitoring circuit 11 and a self-excited oscillation circuit 12). When internal power source voltage Vdd1 generated by the external power supply circuit 5 is supplied to the controller 4 or the like, for example, the fuse F2 is cut. Accordingly, a response according to a purpose such as selection of the external analog module in use of interleave operation can be made. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
