S29GL256P10FFI022 Spansion, S29GL256P10FFI022 Datasheet - Page 30

• Manufacturer Part Number: S29GL256P10FFI022
• Description: Flash 256M, 3V, 110ns Parallel NOR Flash
• Manufacturer: Spansion

Specifications of S29GL256P10FFI022

• Rohs: yes
• Data Bus Width: 16 bit
• Memory Type: NOR Flash
• Memory Size: 256 Mbit
• Architecture: Uniform
• Timing Type: Asynchronous
• Interface Type: CFI
• Access Time: 100 ns
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Current: 110 mA
• Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: FBGA-64
• Organization: 128 KB x 1024

30
7.7.3
Sector Erase
The sector erase function erases one or more sectors in the memory array. (See
Figure
Erase algorithm automatically programs and verifies the entire memory to an all zero data pattern prior to
electrical erase. After a successful sector erase, all locations within the erased sector contain FFFFh. The
system is not required to provide any controls or timings during these operations.
After the command sequence is written, the sector erase time-out t
period, additional sector addresses may be written. Loading the sector erase buffer may be done in any
sequence, and the number of sectors may be from one sector to all sectors. The time between these
additional cycles must be less than 50 µs. Any sector erase address and command following the exceeded
time-out (50 µs) may or may not be accepted. Any command other than Sector Erase or Erase Suspend
during the time-out period resets that sector to the read mode. The system can monitor DQ3 to determine if
the sector erase timer has timed out (See
WE# pulse in the command sequence.
When the Embedded Erase algorithm is complete, the sector returns to reading array data and addresses are
no longer latched. The system can determine the status of the erase operation by reading DQ7 or DQ6/DQ2
in the erasing sector. Refer to
Once the sector erase operation has begun, only the Erase Suspend command is valid. All other commands
are ignored. However, note that a hardware reset immediately terminates the erase operation. If that occurs,
the sector erase command sequence should be reinitiated once that sector has returned to reading array
data, to ensure the sector is properly erased.
The Unlock Bypass feature allows the host system to send program commands to the Flash device without
first writing unlock cycles within the command sequence. See
function.
Figure 7.3
diagrams.
Software Functions and Sample Code
The following is a C source code example of using the sector erase function. Refer to the Spansion Low Level
Driver User’s Guide (available on www.spansion.com) for general information on Spansion Flash memory
software development guidelines.
Cycle
/* Example: Sector Erase Command *
1
2
3
4
5
6
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA;
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055;
*( (UINT16 *)base_addr + 0x555 ) = 0x0080;
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA;
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055;
*( (UINT16 *)sector_address )
7.3.) The device does not require the system to preprogram a sector prior to erase. The Embedded
illustrates the algorithm for the erase operation. Refer to
Unlimited additional sectors may be selected for erase; command(s) must be written within 50 µs.
Sector Erase Command
Setup Command
Description
Unlock
Unlock
Unlock
Unlock
S29GL-P MirrorBit
Section 7.8
(LLD Function = lld_SectorEraseCmd)
= 0x0030;
Section
for information on these status bits.
Table 7.8 Sector Erase
Operation
D a t a
Write
Write
Write
Write
Write
Write
®
Flash Family
/
7.8.6.) The time-out begins from the rising edge of the final
/* write unlock cycle 1
/* write unlock cycle 2
/* write setup command
/* write additional unlock cycle 1 */
/* write additional unlock cycle 2 */
/* write sector erase command
S h e e t
Sector Address
Byte Address
Base + AAAh
Base + AAAh
Base + AAAh
Base + 555h
Base + 555h
Section 7.7.8
SEA
Section 11.7.5
(50 µs) occurs. During the time-out
Sector Address
Word Address
S29GL-P_00_A14 October 22, 2012
Base + 2AAh
Base + 2AAh
Base + 555h
Base + 555h
Base + 555h
for details on the Unlock Bypass
Table 12.1 on page 69
for parameters and timing
*/
*/
*/
*/
00AAh
00AAh
0055h
0080h
0055h
0030h
Data
and