| 摘要 |
PROBLEM TO BE SOLVED: To prevent the increase in a mounting surface, wile holding general purposes by bringing terminals of a first connecting terminal group in an electrical continuity between connecting terminals of asymmetrical positions at both surfaces of a circuit board and connecting terminals of a second connecting terminal group between connecting terminals of symmetrical positions at both surfaces of the board. SOLUTION: Connecting terminal groups 41, 41 are conducted between connecting terminals facing via through-holes in a circuit board, and connected to the connecting terminals for transmitting signals commonly used for all memory modules such as address lines, data lines and the like of a connecting terminal group 31 of a memory 3. Meanwhile, connecting terminal groups 51, 52 do not make continuity between facing connecting terminals, but make a continuity via the connecting terminals adjacent to the facing connecting terminals and through-holes. Thus, necessary signals can be connected to all the modules with a simple structure, and an increase in a mounting area can be prevented while maintaing general purpose properties. |
