| 摘要 |
PROBLEM TO BE SOLVED: To reduce the packaging space of the packaged circuit board and to cope with specification changes in a termination condition by packaging a termination LSI constituted, so that a program element can select a plurality of kinds of termination circuits, onto the circuit board. SOLUTION: Various LSIs (FPGA, gate array, customer LSI or the like) 12a, 12b, 12c, 12d having various interface circuits (TTL, CMOS, GTL, CTT, ECL) are packaged in a printed-circuit board 17, and a termination LSI 19 that is configured independently of the LSIs 12a-12d is packaged between output pins 13 of the LSIs 12a, 12b and input pins 16 of the LSIs 12c, 12d. A data ROM 18 enters programmable data to a program element in the termination LSI 19 to write the data to the program element, which individually selects a termination condition desired between the LSIs, that have various interfaces and changes the specification of the termination condition.
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