| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for loading a configuration code easily from a constitution system to an EEPROM in spite of having a plurality of connected JTAG buses connected with the EEPROM. SOLUTION: A system (200) such as a complex computer system includes a plurality of programmable logic devices connected so as to load the configuration code from the EEPROMs (212, 214, 216). Normally, this loading is performed automatically when power is supplied. The EEPROMs are connected with one of a plurality of serial buses connecting the EEPROMs (212, 214, 216) and a common configuration logic (228), and these buses are JTAG buses typically. A processor (236) puts a programmable logic configuration code through the common configuration logic (228) from a memory and writes it in the EEPROMs (212, 214, 216) through the serial bus connecting a common configuration logic, and the system has a plurality of management processors (526, 528) capable of accessing the common configuration logic (228). The processor can be connected to a network 241 to fetch a common configuration code from a database (224) to write it into the EEPROMs.
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