S29GL01GS Datasheet, PDF (38/104 Pages) SPANSION – GL-S MirrorBit® Eclipse™ Flash Non-Volatile Memory Family

Data Sheet
5.4.2
 Program Suspended (bit 2),
The current state bits indicate whether an EA is in process, suspended, or completed.
The upper 8 bits (bits 15:8) are reserved. These have undefined High or Low value that can change from one
status read to another. These bits should be treated as don't care and ignored by any software reading status.
The Clear Status Register Command will clear to 0 the results related bits of the status register but will not
affect the current state bits.
Table 5.2 Status Register
Bit #
15:8
Bit
Description
Reserved
Bit Name
7
Device
Ready Bit
DRB
6
Erase
Suspend
Status Bit
ESSB
5
Erase
Status Bit
ESB
4
Program
Status Bit
PSB
3
Write Buffer
Abort
Status Bit
WBASB
2
Program
Suspend
Status Bit
PSSB
1
Sector Lock
Status Bit
SLSB
0
Reserved
Reset
Status
X
1
0
0
0
0
0
0
0
Busy Status Invalid
0
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Ready
Status
X
0=Program
1
0=No Erase
in
Suspension
1=Erase in
Suspension
0=Erase
successful
1=Erase fail
0=Program
successful
1=Program
fail
not aborted
1=Program
aborted
during
Write to
Buffer
0=No
Program in
suspension
1=Program
in
suspension
0=Sector
not locked
during
operation
1=Sector
locked error
X
command
Notes:
1. Bits 15 thru 8, and 0 are reserved for future use and may display as 0 or 1. These bits should be ignored (masked) when checking status.
2. Bit 7 is 1 when there is no Embedded Algorithm in progress in the device.
3. Bits 6 thru 1 are valid only if Bit 7 is 1.
4. All bits are put in their reset status by cold reset or warm reset.
5. Bits 5, 4, 3, and 1 are cleared to 0 by the Clear Status Register command or Reset command.
6. Upon issuing the Erase Suspend Command, the user must continue to read status until DRB becomes 1.
7. ESSB is cleared to 0 by the Erase Resume Command.
8. ESB reflects success or failure of the most recent erase operation.
9. PSB reflects success or failure of the most recent program operation.
10. During erase suspend, programming to the suspended sector, will cause program failure and set the Program status bit to 1.
11. Upon issuing the Program Suspend Command, the user must continue to read status until DRB becomes 1.
12. PSSB is cleared to 0 by the Program Resume Command.
13. SLSB indicates that a program or erase operation failed because the sector was locked.
14. SLSB reflects the status of the most recent program or erase operation.
Data Polling Status
During an active Embedded Algorithm the EAC switches to the Data Polling ASO to display EA status to any
read access. A single word of status information is aliased in all locations of the device address space. In the
status word there are several bits to determine the status of an EA. These are referred to as DQ bits as they
appear on the data bus during a read access while an EA is in progress. DQ bits 15 to 8, DQ4, and DQ0 are
reserved and provide undefined data. Status monitoring software must mask the reserved bits and treat them
as don't care. Table 5.3 on page 42 and the following subsections describe the functions of the remaining
bits.
Note that in future technology nodes the Data Polling Status feature will not be supported. The user is
strongly advised to use the Status Register to determine device status.
38
GL-S MirrorBit^® Family
S29GL_128S_01GS_00_06 March 16, 2012