S29GL256P10FFI022 Spansion, S29GL256P10FFI022 Datasheet - Page 51

• 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

10.2
10.3
October 22, 2012 S29GL-P_00_A14
Customer Lockable Secured Silicon Sector
Secured Silicon Sector Entry/Exit Command Sequences
The Customer Lockable Secured Silicon Sector is always shipped unprotected (DQ7 set to “0”), allowing
customers to utilize that sector in any manner they choose. If the security feature is not required, the Secured
Silicon Sector can be treated as an additional Flash memory space.
Please note the following:
 Once the Secured Silicon Sector area is protected, the Secured Silicon Sector Indicator Bit is permanently
 The Secured Silicon Sector can be read any number of times, but can be programmed and locked only
 The accelerated programming (ACC) and unlock bypass functions are not available when the Secured
 Once the Secured Silicon Sector is locked and verified, the system must write the Exit Secured Silicon
The system can access the Secured Silicon Sector region by issuing the three-cycle Enter Secured Silicon
Sector command sequence. The device continues to access the Secured Silicon Sector region until the
system issues the four-cycle Exit Secured Silicon Sector command sequence.
See Command Definitions
Table 12.1 on page 69
sequences.
The Secured Silicon Sector Entry Command allows the following commands to be executed
 Read customer and factory Secured Silicon areas
 Program the customer Secured Silicon Sector
After the system has written the Enter Secured Silicon Sector command sequence, it may read the Secured
Silicon Sector by using the addresses normally occupied by sector SA0 within the memory array. This mode
of operation continues until the system issues the Exit Secured Silicon Sector command sequence, or until
power is removed from the device.
Software Functions and Sample Code
The following are C functions and source code examples of using the Secured Silicon Sector Entry, Program,
and exit commands. Refer to the Spansion Low Level Driver User’s Guide (available soon on
www.spansion.com) for general information on Spansion Flash memory software development guidelines.
Note
Base = Base Address.
set to “0.”
once. The Secured Silicon Sector lock must be used with caution as once locked, there is no procedure
available for unlocking the Secured Silicon Sector area and none of the bits in the Secured Silicon Sector
memory space can be modified in any way.
Silicon Sector is enabled.
Sector Region command sequence which return the device to the memory array at sector 0.
/* Example: SecSi Sector Entry Command */
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA;
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055;
*( (UINT16 *)base_addr + 0x555 ) = 0x0088;
Unlock Cycle 1
Unlock Cycle 2
Entry Cycle
Cycle
through
D a t a
on page 68
S29GL-P MirrorBit
Table 12.4 on page 72
Table 10.2 Secured Silicon Sector Entry
(LLD Function = lld_SecSiSectorEntryCmd)
S h e e t
Operation
[Secured Silicon Sector Command Table, Appendix
Write
Write
Write
®
Flash Family
/* write unlock cycle 1
/* write unlock cycle 2
/* write Secsi Sector Entry Cmd
for address and data requirements for both command
Byte Address
Base + AAAh
Base + AAAh
Base + 555h
Word Address
Base + 2AAh
Base + 555h
Base + 555h
*/
*/
*/
00AAh
0055h
0088h
Data
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