MBM29F016A Datasheet, PDF (16/43 Pages) SPANSION – FLASH MEMORY CMOS 16M (2M x 8) BIT

MBM29F016A-70/-90/-12
Write Operation Status
Table 7 Hardware Sequence Flags
Status
DQ7
DQ6
DQ5
Embedded Program Algorithm
DQ7 Toggle
0
Embedded Erase Algorithm
0 Toggle 0
DQ3
DQ2
0
1
1 Toggle
In Progress
Erase
Suspended
Mode
Erase Suspend Read
(Erase Suspended Sector)
Erase Suspend Read
(Non-Erase Suspended Sector)
Erase Suspend Program
(Non-Erase Suspended Sector)
1
1
0
Data Data Data
DQ7
Toggle
(Note 2)
0
0
Toggle
(Note 1)
Data Data
0
1
(Note 3)
Embedded Program Algorithm
DQ7 Toggle
1
Exceeded ^{Embedded Erase Algorithm}
0 Toggle 1
Time Limits
Erase
Suspended
Mode
Erase Suspend Program
(Non-Erase Suspended Sector)
DQ7 Toggle
1
0
1
1
N/A
0
N/A
Notes: 1. Performing successive read operations from the erase-suspended sector will cause DQ2 to toggle.
2. Performing successive read operations from any address will cause DQ6 to toggle.
3. Reading the byte address being programmed while in the erase-suspend program mode will indicate logic
“1” at the DQ2 bit. However, successive reads from the erase-suspended sector will cause DQ2 to toggle.
DQ7
Data Polling
The MBM29F016A device features Data Polling as a method to indicate to the host that the embedded algorithms
are in progress or completed. During the Embedded Program Algorithm, an attempt to read the device will
produce the complement of the data last written to DQ7. Upon completion of the Embedded Program Algorithm,
an attempt to read the device will produce the true data last written to DQ7. During the Embedded Erase™
Algorithm, an attempt to read the device will produce a “0” at the DQ7 output. Upon completion of the Embedded
Erase Algorithm an attempt to read the device will produce a “1” at the DQ7 output. The flowchart for Data Polling
(DQ7) is shown in Figure 18.
Data polling will also flag the entry into Erase Suspend. DQ7 will switch “0” to “1” at the start of the Erase Suspend
mode. Please note that the address of an erasing sector must be applied in order to observe DQ7 in the Erase
Suspend Mode.
During Program in Erase Suspend, Data polling will perform the same as in regular program execution outside
of the suspend mode.
For chip erase, the Data Polling is valid after the rising edge of the sixth WE pulse in the six write pulse sequence.
For sector erase, the Data Polling is valid after the last rising edge of the sector erase WE pulse. Data Polling
must be performed at sector address within any of the sectors being erased and not a sector that is within a
protected sector group. Otherwise, the status may not be valid.
Just prior to the completion of Embedded Algorithm operation DQ7 may change asynchronously while the output
enable (OE) is asserted low. This means that the device is driving status information on DQ7 at one instant of
time and then that byte's valid data at the next instant of time. Depending on when the system samples the DQ7
16