| 摘要 |
An electronic circuit coordinates accesses to a register shared among multiple system resources by managing the priority of each system resource relative to others. When a priority register access is initiated, a signal is generated to block a simultaneous or overlapping register access by another system resource. If another register access is already in operation, it will be completed before the priority register access operates on the shared register. Otherwise, if the priority register access operates on the register first, the non-priority register access is held off until the priority register access completes. A method coordinates the potentially simultaneous or overlapping register accesses by multiple system resources to a shared register. When a priority register access initiates, a lookahead signal issues to set a busy flag that blocks competing register accesses until the priority register access completes.
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