Storage Interface ERROR Handling
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
System lockup can be caused by undetected errors. External detection logic is usually required to alleviate this problem. Storage Interface Error Handling is a method providing a mechanism that detects bus errors early in a bus cycle, prevents system lockup, and requires no extra external logic. Conventional small systems use an asynchronous bus to store or fetch data, as shown in Fig. 1. This bus is architected so that a READY signal is required to store or read the data. The READY is issued, by the slave based upon the access time of the addressed device. If a READY is never issued the bus will be in a locked condition. Therefore, if a master issues an address in conjunction with ADDRESS STROBE and the address is not recognized by any bus device , i.e.