| 摘要 |
A memory protection arrangement includes a primary power supply unit and a back-up battery. The back-up battery supplies maintenance energy to the memory itself, the battery being automatically effective whenever the primary power supply voltage decays to a value less than that of the battery. There is also provided apparatus which is responsive to a failure of the main power source to effect the application of a control signal to an input of the memory to disable the memory input from responding to spurious signals during a power-down condition.
|
