| 摘要 |
<p>PURPOSE:To easily enhance the function of a ROM card without any change in the function of an equipment controlling the ROM card by mounting a change over means for a plurality of ROM chips. CONSTITUTION:A ROM card comprises a card-form body 1, a COB 2 set on the body 1, ROM chips 3, 4 loaded on the COB 2, a change-over switch part 6 which is changed over by a user for selecting the ROM chips 3, 4 independently, and a connection terminal 5 to be connected to an equipment controlling the ROM card. If change-over contact pieces 11 are connected as shown by full lines, a terminal 9 connecting to a chip enable terminal of the ROM chip 3 to be connected to a power sources terminal 7, and a terminal 10 connecting to a chip enable terminal of the ROM chip 4 to be connected to a grounding terminal 8. Therefore, the ROM chip 3 comes into a selected state, and the ROM chip 4 comes into an unselected state. If the change-over contact pieces 11 are connected as shown by broken lines, conversely, the ROM chip 3 comes into an unselected state, and the ROM chip 4 comes into a selected state.</p> |
