M1AFS600-PQ208 Datasheet, PDF (67/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Fusion Family of Mixed Signal FPGAs
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.
Revision 4
2- 51