S29GL-A SPANSION [SPANSION], S29GL-A Datasheet - Page 54

• Manufacturer Part Number: S29GL-A
• Description: S29GL-A MirrorBit Flash Family
• Manufacturer: SPANSION [SPANSION]

52
Erase Suspend/Erase Resume Commands
The Erase Suspend command, B0h, allows the system to interrupt a sector erase
operation and then read data from, or program data to, any sector not selected
for erasure. This command is valid only during the sector erase operation, in-
cluding the 50 µs time-out period during the sector erase command sequence.
The Erase Suspend command is ignored if written during the chip erase opera-
tion or Embedded Program algorithm.
When the Erase Suspend command is written during the sector erase operation,
the device requires a typical of 5 µs (maximum of 20 µs) to suspend the erase
operation. However, when the Erase Suspend command is written during the
sector erase time-out, the device immediately terminates the time-out period
and suspends the erase operation.
After the erase operation is suspended, the device enters the erase-sus-
pend-read mode. The system can read data from or program data to any sector
not selected for erasure. (The device erase suspends all sectors selected for era-
sure.) Reading at any address within erase-suspended sectors produces status
information on DQ7–DQ0. The system can use DQ7, or DQ6 and DQ2 together,
to determine if a sector is actively erasing or is erase-suspended. Refer to
Operation Status on page 56
Notes:
1.See
2.See the section on DQ3 for information on the sector erase timer.
Table 30
No
S29GL-A MirrorBit™ Flash Family
Command Sequence
Data Poll to Erasing
Figure 6. Erase Operation
Erasure Completed
Bank from System
A d v a n c e
and
for information on these status bits.
Write Erase
(Notes 1, 2)
Data = FFh?
Table 31
START
Yes
for program command sequence.
I n f o r m a t i o n
Embedded
Erase
algorithm
in progress
Write
S29GL-A_00_A3 April 22, 2005