参数资料
型号: S71PL129JC0BFW9Z2
厂商: SPANSION LLC
元件分类: 存储器
英文描述: Stacked Multi-Chip Product (MCP) Flash Memory
中文描述: SPECIALTY MEMORY CIRCUIT, PBGA64
封装: 8 X 11.60 MM, 1.20 MM HEIGHT, LEAD FREE, FBGA-64
文件页数: 87/153页
文件大小: 3651K
代理商: S71PL129JC0BFW9Z2
October 28, 2005 S71PL129Jxx_00_A8
S71PL129JC0/S71PL129JB0/S71PL129JA0
37
Advance
Informatio n
Persistent Protection Bit Lock
The Persistent Protection Bit (PPB) Lock is a volatile bit that reflects the state of
the Password Mode Locking Bit after power-up reset. If the Password Mode Lock
Bit is also set after a hardware reset (RESET# asserted) or a power-up reset, the
ONLY means for clearing the PPB Lock Bit in Password Protection Mode is to issue
the Password Unlock command. Successful execution of the Password Unlock
command clears the PPB Lock Bit, allowing for sector PPBs modifications. Assert-
ing RESET#, taking the device through a power-on reset, or issuing the PPB Lock
Bit Set command sets the PPB Lock Bit to a “1” when the Password Mode Lock Bit
is not set.
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 command. Once set the only means for clear-
ing the PPB Lock Bit is by issuing a hardware or power-up reset. The Password
Unlock command is ignored in Persistent Protection Mode.
High Voltage Sector Protection
Sector protection and unprotection may also be implemented using programming
equipment. The procedure requires high voltage (VID) to be placed on the RE-
SET# pin. Refer to Figure 1 for details on this procedure. Note that for sector
unprotect, all unprotected sectors must first be protected prior to the first sector
write cycle.
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