S29GL032N90TFI030 Spansion Inc., S29GL032N90TFI030 Datasheet - Page 33

• Manufacturer Part Number: S29GL032N90TFI030
• Description: Flash 3V 32Mb Float Gate two address 90s
• Manufacturer: Spansion Inc.

Specifications of S29GL032N90TFI030

• Memory Type: NOR
• Memory Size: 32 Mbit
• Access Time: 90 ns
• Data Bus Width: 8 bit, 16 bit
• Architecture: Uniform / Boot Sector
• Interface Type: Page-mode
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Current: 50 mA
• Mounting Style: SMD/SMT
• Operating Temperature: + 85 C
• Package / Case: TSOP-48
• Ic Interface Type: CFI, Parallel
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: TSOP
• No. Of Pins: 48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

October 29, 2008 S29GL-N_01_12
8.11.3
Persistent Protection Bit Lock (PPB Lock Bit)
A global volatile bit. When set to the “freeze state”, the PPB bits cannot be changed. When cleared to the
“unfreeze state”, the PPB bits are changeable. There is only one PPB Lock Bit per device. The PPB Lock Bit
is cleared to the “unfreeze state” at power-up or hardware reset. There is no command sequence to unlock or
“unfreeze” the PPB Lock Bit.
Configuring the PPB Lock Bit to the freeze state requires approximately 100ns. Reading the PPB Lock Status
bit requires the initial access time (t
Table 8.11
of the sector. In summary, if the PPB bit is set, and the PPB Lock Bit is set, the sector is protected and the
protection cannot be removed until the next power cycle or hardware reset clears the PPB Lock Bit to
“unfreeze state”. If the PPB bit is cleared, the sector can be dynamically locked or unlocked. The DYB bit then
controls whether or not the sector is protected or unprotected. If the user attempts to program or erase a
protected sector, the device ignores the command and returns to read mode. A program command to a
protected sector enables status polling for approximately 1 µs before the device returns to read mode without
having modified the contents of the protected sector. An erase command to a protected sector enables status
polling for approximately 50 µs after which the device returns to read mode without having erased the
protected sector. The programming of the DYB bit, PPB bit, and PPB Lock Bit for a given sector can be
verified by writing a DYB Status Read, PPB Status Read, and PPB Lock Status Read commands to the
device.
The Autoselect Sector Protection Verification outputs the OR function of the DYB bit and PPB bit per sector
basis. When the OR function of the DYB bit and PPB bit is a 1, the sector is either protected by DYB or PPB
or both. When the OR function of the DYB bit and PPB bit is a 0, the sector is unprotected through both the
DYB and PPB.
Unprotect
Unprotect
Unprotect
Unprotect
DYB Bit
Protect
Protect
Protect
Protect
contains all possible combinations of the DYB bit, PPB bit, and PPB Lock Bit relating to the status
Protection States
Unprotect
Unprotect
Unprotect
Unprotect
PPB Bit
Protect
Protect
Protect
Protect
D a t a
S29GL-N MirrorBit
Table 8.11 Sector Protection Schemes
S h e e t
ACC
PPB Lock Bit
) of the device.
Unfreeze
Unfreeze
Unfreeze
Unfreeze
Freeze
Freeze
Freeze
Freeze
®
Flash Family
Unprotected – PPB and DYB are changeable
Unprotected – PPB not changeable, DYB is changeable
Protected – PPB and DYB are changeable
Protected – PPB not changeable, DYB is changeable
Protected – PPB and DYB are changeable
Protected – PPB not changeable, DYB is changeable
Protected – PPB and DYB are changeable
Protected – PPB not changeable, DYB is changeable
Sector State
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