am49pdl129bh85it Meet Spansion Inc., am49pdl129bh85it Datasheet - Page 40

• Manufacturer Part Number: am49pdl129bh85it
• Description: Stacked Multi-chip Package Mcp Flash Memory And Psram, 128 Megabit 8m ? 16-bit Cmos 3.0 Volt-only, Simultaneous Operation Flash Memory And 32 Mbit 2m ? 16-bit Cmos Pseudo Static Ram With Page Mode
• Manufacturer: Meet Spansion Inc.

If the Password Mode Locking Bit is not set, including
Persistent Protection Mode, the PPB Lock Bit is
cleared after power-up or hardware reset. The PPB
Lock Bit is set by issuing the PPB Lock Bit Set com-
mand. Once set the only means for clearing the PPB
Lock Bit is by issuing a hardware or power-up reset.
The Password Unlock command is ignored in Persis-
tent Protection Mode.
38
A D V A N C E
Am49PDL127BH/Am49PDL129BH
I N F O R M A T I O N
High Voltage Sector Protection
Sector protection and unprotection may also be imple-
mented using programming equipment. The proce-
dure requires high voltage (V
RESET# pin. Refer to Figure 1 for details on this pro-
cedure. Note that for sector unprotect, all unprotected
sectors must first be protected prior to the first sector
write cycle.
ID
) to be placed on the
December 16, 2003