參數(shù)資料
型號(hào)： AM49PDL129AH
廠商： Spansion Inc.
英文描述： 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
中文描述： 128兆位（8米× 16位），3.0伏的CMOS只，同時(shí)作業(yè)閃存和16兆位（1米× 16位）的CMOS偽靜態(tài)隨機(jī)存儲(chǔ)器
文件頁(yè)數(shù)： 39/82頁(yè)
文件大?。?/td> 565K
代理商： AM49PDL129AH
December 18, 2003
Am49PDL127AH/Am49PDL129AH
37
A D V A N C E I N F O R M A T I O N
Note that the WP#/ACC pin must not be left floating or
unconnected; inconsistent behavior of the device may
result.
Persistent Protection Bit Lock
The Persistent Protection Bit (PPB) Lock is a volatile
bit that reflects the state of the Password Mode Lock-
ing 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. Suc-
cessful execution of the Password Unlock command
clears the PPB Lock Bit, allowing for sector PPBs
modifications. Asserting 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 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.
High Voltage Sector Protection
Sector protection and unprotection may also be imple-
mented using programming equipment. The proce-
dure requires high voltage (V
ID
) to be placed on the
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.
相關(guān)PDF資料
PDF描述
AM49PDL129AH61IT 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM49PDL129AH61IS 制造商:SPANSION 制造商全稱:SPANSION 功能描述:128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
AM49PDL129AH61IT 制造商:SPANSION 制造商全稱:SPANSION 功能描述:128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
AM49PDL129AH70IS 制造商:SPANSION 制造商全稱:SPANSION 功能描述:128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
AM49PDL129AH70IT 制造商:SPANSION 制造商全稱:SPANSION 功能描述:128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 16 Mbit (1 M x 16-Bit) CMOS Pseudo Static RAM
AM49PDL129BH 制造商:SPANSION 制造商全稱:SPANSION 功能描述:128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 32 Mbit (2 M x 16-Bit) CMOS
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