| 摘要 |
<p>A write protect system (100) including a write protect circuit (10) that may provide write protection for a protected register (1) has been disclosed. Write protect circuit (10) may detect whether or not a write sequence (600) has been followed. Write sequence (600) may include first (901), second (902), and third (903) commands. First command (901) may include a write of data to a protected register (1). Second command (902) may include a write of inverted data to a protected register (1). A third command (903) may include a write of data to a protected register (1). Write protect circuit (10) may only allow a write to a protected register (1) if write sequence (600) has been followed. In this way, a protected register (1) may be protected against erroneous writes and a system (100) including a CPU (6) may have improved reliability. <IMAGE></p> |
