s71ws512ne0bfwzz Meet Spansion Inc., s71ws512ne0bfwzz Datasheet - Page 64

• Manufacturer Part Number: s71ws512ne0bfwzz
• Description: Stacked Multi-chip Product Mcp Flash Memoy And Psram Cmos 1.8 Volt, Simultaneous Operation, Burst Mode Flash Memory And Pseudo-static Ram
• Manufacturer: Meet Spansion Inc.

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Global Volatile Sector Protection Freeze Command Set
bank, will return the PPB status for that sector. Writes within that bank, will set
the PPB for that sector. Reads from other banks are allowed, writes are not al-
lowed. All Reads must be performed using the Asynchronous mode.
The PPB Program command is used to program, or set, a given PPB. Each PPB is
individually programmed (but is bulk erased with the other PPBs). The specific
sector address (A23–A14 WS256N) are written at the same time as the program
command. If the PPB Lock Bit is set, the PPB Program command will not execute
and the command will time-out without programming the PPB.
The All PPB Erase command is used to erase all PPBs in bulk. There is no means
for individually erasing a specific PPB. Unlike the PPB program, no specific sector
address is required. However, when the PPB erase command is written, all Sector
PPBs are erased in parallel. If the PPB Lock Bit is set the ALL PPB Erase command
will not execute and the command will time-out without erasing the PPBs.
The device will preprogram all PPBs prior to erasing when issuing the All PPB
Erase command. Also note that the total number of PPB program/erase cycles has
the same endurance as the flash memory array.
The programming state of the PPB for a given sector can be verified by writing a
PPB Status Read Command to the device.
The Non-Volatile Sector Protection Command Set Exit command must be
issued after the execution of the commands listed previously to reset the device
to read mode.
Note that issuing the Non-Volatile Sector Protection Command Set Exit
command re-enables reads and writes for Bank 0.
The Global Volatile Sector Protection Freeze Command Set permits the user to set
the PPB Lock Bit and reading the logic state of the PPB Lock Bit.
The Volatile Sector Protection Freeze Command Set Entry command se-
quence must be issued prior to any of the commands listed following to enable
proper command execution.
Reads from all banks are allowed.
The PPB Lock Bit Set command is used to set the PPB Lock bit if it is cleared either
at reset or if the Password Unlock command was successfully executed. There is
no PPB Lock Bit Clear command. Once the PPB Lock Bit is set, it cannot be cleared
unless the device is taken through a power-on clear (for Persistent Sector Protec-
tion Mode) or the Password Unlock command is executed (for Password Sector
Protection Mode). If the Password Mode Locking Bit is set, the PPB Lock Bit status
is reflected as set, even after a power-on reset cycle.
The programming state of the PPB Lock Bit can be verified by executing a PPB
Lock Bit Status Read Command to the device.
The Global Volatile Sector Protection Freeze Command Set Exit command
must be issued after the execution of the commands listed previously to reset the
device to read mode.
PPB Lock Bit Set Command
PPB Lock Bit Status Read Command
S29WSxxxN MirrorBit™ Flash Family For Multi-chip Products (MCP) S71WS512NE0BFWZZ_00_ A1 June 28, 2004
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