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S29GL01GT11FAIyyx Datasheet(Fiches technique) 28 Page - Cypress Semiconductor

Numéro de pièce S29GL01GT11FAIyyx
Description  1 Gbit (128 Mbyte), 512 Mbit (64 Mbyte)
Télécharger  105 Pages
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Fabricant  CYPRESS [Cypress Semiconductor]
Site Internet  http://www.cypress.com
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 28 page
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Document Number: 002-00247 Rev. *G
Page 28 of 105
S29GL01GT, S29GL512T
/* Example: Unlock Bypass Entry Command */
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA; /* write unlock cycle 1 */
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055; /* write unlock cycle 2 */
*( (UINT16 *)base_addr + 0x555 ) = 0x0020; /* write unlock bypass command */
/* At this point, programming only takes two write cycles. */
/* Once you enter Unlock Bypass Mode, do a series of like */
/* operations (programming or sector erase) and then exit */
/* Unlock Bypass Mode before beginning a different type of */
/* operations. */
/* Example: Unlock Bypass Program Command */
/* Do while in Unlock Bypass Entry Mode! */
*( (UINT16 *)base_addr ) = 0x00A0; /* write program setup command */
*( (UINT16 *)pa ) = data; /* write data to be programmed */
/* Poll until done or error. */
/* If done and more to program, */
/* do above two cycles again. */
/* Example: Unlock Bypass Exit Command */
*( (UINT16 *)base_addr ) = 0x0090;
*( (UINT16 *)base_addr ) = 0x0000;
5.4.5
Evaluate Erase Status
The Evaluate Erase Status (EES) command verifies that the last erase operation on the addressed sector was completed
successfully (i.e. “Trust Worthy”). The EES command can be used to detect erase operations failed due to loss of power, reset, or
failure during the erase operation.
To initiate a EES on a Sector, write 35h to address 555h in the Sector, while the EAC is in the standby state.
The EES command may not be written while the device is actively programming or erasing or suspended.
The EES command does not allow for reads to the array during the operation.
Use the Status Register or Polling method (only DQ6 toggles) to determine if the device is busy or completed. Once completed use
the Status Register read to confirm if the sector is trust worthy or not. Bit 5 of the Status Register (SR[5]) will be cleared to 0 if the
sector is trust worthy. If the sector is not trust worthy than SR[5] will be set to 1, RD/BY# will stay low, and either a Software Reset /
ASO Exit command or a Status Register Clear command is required to return the device to the Standby State.
Once the EES is completed, the EAC will return to the Standby State.
The EES command requires tEES to complete and update the erase status in SR. The DRB bit (SR[7]) may be read to determine
when the EES command is finished. If a sector is found not erased with SR[5]=1, the sector must be erased again to ensure reliable
storage of data in the sector.
Table 5.3 Unlock Bypass Program (LLD Function = lld_UnlockBypassProgramCmd)
Cycle
Description
Operation
Byte Address
Word Adddress
Data
1
Program Setup
Write
Base + XXXh
Base + XXXh
00A0h
2
Program Command
Write
Program Address
Program Address
Program Data
Table 5.4 Unlock Bypass Reset (LLD Function = lld_UnlockBypassResetCmd)
Cycle
Description
Operation
Byte Address
Word Adddress
Data
1
Reset Cycle 1
Write
Base + XXXh
Base + XXXh
0090h
2
Reset Cycle 2
Write
Program Address
Program Address
0000h




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