S71PL512ND0 Datasheet, PDF (32/90 Pages) SPANSION – Two S29PL256N Devices (32 M x 16-Bit) CMOS 3.0-Volt only Simultaneous Read/Write, Page-Mode Flash Memory

Preliminary
After an erase-suspended program operation is complete, the bank returns to the erase-suspend-
read mode. The system can determine the status of the program operation using the DQ7 or DQ6
status bits, just as in the standard program operation.
In the erase-suspend-read mode, the system can also issue the Autoselect command sequence.
See Write Buffer Programming and Autoselect for details.
To resume the sector erase operation, the system must write the Erase Resume command. The
bank address of the erase-suspended bank is required when writing this command. Further writes
of the Resume command are ignored. Another Erase Suspend command can be written after the
chip has resumed erasing.
Software Functions and Sample Code
Cycle
1
Table 9.11 Erase Suspend
(LLD Function = lld_EraseSuspendCmd)
Operation
Word Address
Write
Bank Address
Data
00B0h
The following is a C source code example of using the erase suspend function. Refer to the
Spansion Low Level Driver User’s Guide (available on www.amd.com and www.fujitsu.com)
for general information on Spansion Flash memory software development guidelines.
/* Example: Erase suspend command */
*((UINT16 *)bank_addr + 0x000) = 0x00B0; /* write suspend command
*/
Table 9.12 Erase Resume
Cycle
1
(LLD Function = lld_EraseResumeCmd)
Operation
Word Address
Write
Bank Address
Data
0030h
The following is a C source code example of using the erase resume function. Refer to the
Spansion Low Level Driver User’s Guide (available on www.amd.com and www.fujitsu.com)
for general information on Spansion Flash memory software development guidelines.
/* Example: Erase resume command */
*((UINT16 *)bank_addr + 0x000) = 0x0030; /* write resume command
*/
/* The flash needs adequate time in the resume state */
9.4.6 Program Suspend/Program Resume Commands
The Program Suspend command allows the system to interrupt an embedded programming op-
eration or a Write to Buffer programming operation so that data can read from any non-
suspended sector. When the Program Suspend command is written during a programming pro-
cess, the device halts the programming operation within t_PSL (program suspend latency) and
updates the status bits.
After the programming operation has been suspended, the system can read array data from any
non-suspended sector. The Program Suspend command can also be issued during a programming
operation while an erase is suspended. In this case, data can be read from any addresses not in
Erase Suspend or Program Suspend. If a read is needed from the Secured Silicon Sector area,
then user must use the proper command sequences to enter and exit this region.
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S29PL-N MirrorBit™ Flash Family
S29PL-N_M0_A4 November 23, 2005