參數(shù)資料
型號(hào)： M29DW640F70N6F
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 4M X 16 FLASH 3V PROM, 70 ns, PDSO48
封裝： 12 X 20 MM, LEAD FREE, PLASTIC, TSOP-48
文件頁(yè)數(shù)： 6/74頁(yè)
文件大?。?/td> 556K
代理商： M29DW640F70N6F
Signal descriptions
M29DW640F
2.7
Write Enable (W)
The Write Enable, W, controls the Bus Write operation of the memory’s Command Interface.
2.8
VPP/Write Protect (VPP/WP)
The VPP/Write Protect pin provides two functions. The VPP function allows the memory to
use an external high voltage power supply to reduce the time required for Program
operations. This is achieved by bypassing the unlock cycles and/or using the multiple Word
(2 or 4 at-a-time) or multiple Byte Program (2, 4 or 8 at-a-time) commands. The Write
Protect function provides a hardware method of protecting the four outermost boot blocks
(two at the top, and two at the bottom of the address space).
When VPP/Write Protect is Low, VIL, the memory protects the four outermost boot blocks;
Program and Erase operations in these blocks are ignored while VPP/Write Protect is Low,
even when RP is at VID.
When VPP/Write Protect is High, VIH, the memory reverts to the previous protection status
of the four outermost boot blocks (two at the top, and two at the bottom of the address
space). Program and Erase operations can now modify the data in these blocks unless the
blocks are protected using Block Protection.
Applying VPPH to the VPP/WP pin will temporarily unprotect any block previously protected
(including the four outermost parameter blocks) using a High Voltage Block Protection
technique (In-System or Programmer technique). See Table 3: Hardware protection for
details.
When VPP/Write Protect is raised to VPP the memory automatically enters the Unlock
Bypass mode. When VPP/Write Protect returns to VIH or VIL normal operation resumes.
During Unlock Bypass Program operations the memory draws IPP from the pin to supply the
programming circuits. See the description of the Unlock Bypass command in the Command
Interface section. The transitions from VIH to VPP and from VPP to VIH must be slower than
tVHVPP, see Figure 17.
Never raise VPP/Write Protect to VPP from any mode except Read mode, otherwise the
memory may be left in an indeterminate state.
The VPP/Write Protect pin must not be left floating or unconnected or the device may
become unreliable. A 0.1F capacitor should be connected between the VPP/Write Protect
pin and the VSS Ground pin to decouple the current surges from the power supply. The PCB
track widths must be sufficient to carry the currents required during Unlock Bypass Program,
IPP.
Table 3.
Hardware protection
VPP/WP
RP
Function
VIL
VIH
4 outermost parameter blocks protected from Program/Erase
operations
VID
All blocks temporarily unprotected except the 4 outermost blocks
VIH or VID
VID
All blocks temporarily unprotected
VPPH
VIH or VID
All blocks temporarily unprotected
相關(guān)PDF資料
PDF描述
M29F002BB120K1 2 Mbit 256Kb x8, Boot Block Single Supply Flash Memory
M29F016D90M6F 2M X 8 FLASH 5V PROM, 90 ns, PDSO44
M29F016D70N1E 2M X 8 FLASH 5V PROM, 70 ns, PDSO40
M29F100B-150M3TR 128K X 8 FLASH 5V PROM, 150 ns, PDSO44
M29F200B-90XM3 256K X 8 FLASH 5V PROM, 90 ns, PDSO44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M29DW640F70N6T 制造商:NUMONYX 制造商全稱:Numonyx B.V 功能描述:64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
M29DW640F70ZE1 制造商:NUMONYX 制造商全稱:Numonyx B.V 功能描述:64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
M29DW640F70ZE1E 制造商:NUMONYX 制造商全稱:Numonyx B.V 功能描述:64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
M29DW640F70ZE1F 制造商:NUMONYX 制造商全稱:Numonyx B.V 功能描述:64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
M29DW640F70ZE1T 制造商:NUMONYX 制造商全稱:Numonyx B.V 功能描述:64 Mbit (8Mb x8 or 4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*