M1AFS250-FGG256I Actel Corporation, M1AFS250-FGG256I Datasheet - Page 65

• Manufacturer Part Number: M1AFS250-FGG256I
• Description: Actel Fusion Family Of Mixed Signal Fpgas
• Manufacturer: Actel Corporation

Figure 2-37 • FB Erase Page Waveform
OVERWRITEPROTECT
PAGELOSSPROTECT
STATUS[1:0]
ADDR[17:0]
Erase Page Operation
The Erase Page operation is initiated when the ERASEPAGE pin is asserted. The Erase Page operation
allows the user to erase (set user data to zero) any page within the FB.
The use of the OVERWRITEPAGE and PAGELOSSPROTECT pins is the same for erase as for a
Program Page operation.
As with the Program Page operation, a STATUS of '01' indicates that the addressed page is not erased.
A waveform for an Erase Page operation is shown in
Erase errors include the following:
ERASE
BUSY
1. Attempting to erase a page that is Overwrite Protected (STATUS = '01')
2. Attempting to erase a page that is not in the Page Buffer when the Page Buffer has entered Page
3. The Write Count of the erased page exceeding the Write Threshold defined in the part
4. The ECC Logic determining that there is an uncorrectable error within the erased page (STATUS
CLK
Loss Protection mode (STATUS = '01')
specification (STATUS = '11')
= '10')
Page
R e v i s i o n 1
Figure
2-37.
Actel Fusion Family of Mixed Signal FPGAs
Valid
2- 49