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MBM29F040C-90 参数 Datasheet PDF下载

MBM29F040C-90图片预览
型号: MBM29F040C-90
PDF下载: 下载PDF文件 查看货源
内容描述: 闪存4M ( 512K ×8 )位 [FLASH MEMORY 4M (512K x 8) BIT]
分类和应用: 闪存
文件页数/大小: 41 页 / 423 K
品牌: SPANSION [ SPANSION ]
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MBM29F040C-55/-70/-90  
Table 3 MBM29F040C Sector Protection Verify Autoselect Codes  
Code  
(HEX)  
Type  
A18  
X
A17  
A16  
X
A6  
VIL  
VIL  
VIL  
A1  
VIL  
VIL  
VIH  
A0  
VIL  
VIH  
VIL  
DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0  
Manufacture’s  
Code  
X
04H  
A4H  
01H*  
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
Device Code  
X
X
X
Sector  
Sector  
Protection  
Addresses  
* : Outputs 01H at protected sector addresses and 00H at unprotected sector addresses.  
Table 4 Sector Address Tables  
Sector Address  
A18  
0
A17  
0
A16  
0
Address Range  
00000H to 0FFFFH  
10000H to 1FFFFH  
20000H to 2FFFFH  
30000H to 3FFFFH  
40000H to 4FFFFH  
50000H to 5FFFFH  
60000H to 6FFFFH  
70000H to 7FFFFH  
SA0  
SA1  
SA2  
SA3  
SA4  
SA5  
SA6  
SA7  
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Write  
Device erasure and programming are accomplished via the command register. The contents of the register serve  
as inputs to the internal state machine. The state machine outputs dictate the function of the device.  
The command register itself does not occupy any addressable memory location. The register is a latch used to  
store the commands, along with the address and data information needed to execute the command. The  
command register is written by bringing WE to VIL, while CE is at VIL and OE is at VIH. Addresses are latched on  
the falling edge of WE or CE, whichever happens later; while data is latched on the rising edge of WE or CE,  
whichever happens first. Standard microprocessor write timings are used.  
Refer to AC Write Characteristics and the Erase/Programming Waveforms for specific timing parameters.  
Sector Protection  
The MBM29F040C features hardware sector protection. This feature will disable both program and erase  
operations in any number of sectors (0 through 8). The sector protection feature is enabled using programming  
equipment at the user’s site. The device is shipped with all sectors unprotected.  
To activate this mode, the programming equipment must force VID on address pin A9 and control pin OE, (suggest  
VID = 11.5 V) and CE = VIH. The sector addresses (A18, A17 and A16) should be set to the sector to be protected.  
Table 4 defines the sector address for each of the eight (8) individual sectors. Programming of the protection  
circuitry begins on the falling edge of the WE pulse and is terminated with the rising edge of the same. Sector  
addresses must be held constant during the WE pulse. See figures 11 and 17 sector protection waveforms and  
algorithm.  
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