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P1AFS600-FGG484I Datasheet(PDF) 67 Page - Microsemi Corporation |
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P1AFS600-FGG484I Datasheet(HTML) 67 Page - Microsemi Corporation |
67 / 334 page Fusion Family of Mixed Signal FPGAs Revision 4 2-51 The following error indications are possible for Read operations: 1. STATUS = '01' when a single-bit data error was detected and corrected within the block addressed. 2. STATUS = '10' when a double-bit error was detected in the block addressed (note that the error is uncorrected). In addition to data reads, users can read the status of any page in the FB by asserting PAGESTATUS along with REN. The format of the data returned by a page status read is shown in Table 2-23, and the definition of the page status bits is shown in Table 2-24. Table 2-23 • Page Status Read Data Format 31 8 7 4 3 2 1 0 Write Count Reserved Over Threshold Read Protected Write Protected Overwrite Protected Table 2-24 • Page Status Bit Definition Page Status Bit(s) Definition 31–8 The number of times the page addressed has been programmed/erased 7–4 Reserved; read as 0 3 Over Threshold indicator (see the"Program Operation" section on page 2-48) 2 Read Protected; read protect bit for page, which is set via the JTAG interface and only affects JTAG operations. This bit can be overridden by using the correct user key value. 1 Write Protected; write protect bit for page, which is set via the JTAG interface and only affects JTAG operations. This bit can be overridden by using the correct user key value. 0 Overwrite Protected; designates that the user has set the OVERWRITEPROTECT bit on the interface while doing a Program operation. The page cannot be written without first performing an Unprotect Page operation. |
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