| 摘要 |
A digital bus is driven to the logic state of a data input signal upon activating a data enable signal. A bus keeper enable signal activates a buffer having its input and output connected to the digital bus. The data is thus buffered and driven back onto the digital bus during the active state of the bus keeper enable signal in order to retain the logic state after the data enable signal deactivates. The bus keeper enable signal remains active until a subsequent data enable signal becomes active thereby retaining the data on the bus potentially indefinitely.
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