參數(shù)資料
型號： MBM29LV001BC-55
廠商： Fujitsu Limited
英文描述： 1M (128K x 8) BIT
中文描述： 100萬（128K的× 8）位
文件頁數(shù)： 14/49頁
文件大?。?/td> 421K
代理商： MBM29LV001BC-55
MBM29LV001TC
-55/-70
/MBM29LV001BC
-55/-70
14
Command Definitions
Device operations are selected by writing specific address and data sequences into the command register.
Writing incorrect address and data values or writing them in the improper sequence will reset the devices to the
read mode. Table 6 defines the valid register command sequences. Note that the Erase Suspend (B0H) and
Erase Resume (30H) commands are valid only while the Sector Erase operation is in progress. Moreover both
Read/Reset commands are functionally equivalent, resetting the device to the read mode.
Read/Reset Command
In order to return from Autoselect mode or Exceeded Timing Limits (DQ
5
= 1) to read/reset mode, the read/reset
operation is initiated by writing the Read/Reset command sequence into the command register. Microprocessor
read cycles retrieve array data from the memory. The devices remain enabled for reads until the command
register contents are altered.
The devices will automatically power-up in the read/reset state. In this case, a command sequence is not required
to read data. Standard microprocessor read cycles will retrieve array data. This default value ensures that no
spurious alteration of the memory content occurs during the power transition. Refer to the AC Read
Characteristics and Waveforms for the specific timing parameters.
Autoselect Command
Flash memories are intended for use in applications where the local CPU alters memory contents. As such,
manufacture and device codes must be accessible while the devices reside in the target system. PROM
programmers typically access the signature codes by raising A
9
to a high voltage. However, multiplexing high
voltage onto the address lines is not generally desired system design practice.
The device contains an Autoselect command operation to supplement traditional PROM programming
methodology. The operation is initiated by writing the Autoselect command sequence into the command register.
Following the command write, a read cycle from address XX00H retrieves the manufacture code of 04H. A read
cycle from address XX01H returns the device code (MBM29LV001TC = EDH and MBM29LV001BC = 6DH).
(See Tables 3.1 and 3.2.) All manufacturer and device codes will exhibit odd parity with DQ
7
defined as the parity
bit. Sector state (protection or unprotection) will be informed by address XX02H.
Scanning the sector addresses (A
16
, A
15
, A
14
, A
13
and A
12
) while (A
6
, A
1
, A
0
) = (0, 1, 0) will produce a logical “1”
at device output DQ
0
for a protected sector. The programming verification should be perform margin mode on
the protected sector. (See Tables 2 and 3.)
To terminate the operation, it is necessary to write the Read/Reset command sequence into the register, and
also to write the Autoselect command during the operation, execute it after writing Read/Reset command
sequence.
相關PDF資料
PDF描述
MBM29LV001BC-55PD 1M (128K x 8) BIT
MBM29LV001BC-55PFTN 1M (128K x 8) BIT
MBM29LV001BC-55PFTR 1M (128K x 8) BIT
MBM29LV001BC-70 ETHERNET TO TOKEN RING ADAPTER TCP/IP TRB US
MBM29LV001TC-55 1M (128K x 8) BIT
相關代理商/技術參數(shù)
參數(shù)描述
MBM29LV001BC-55PD 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1M (128K x 8) BIT
MBM29LV001BC-55PFTN 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1M (128K x 8) BIT
MBM29LV001BC-55PFTR 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1M (128K x 8) BIT
MBM29LV001BC-70 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1M (128K x 8) BIT
MBM29LV001BC-70PD 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1M (128K x 8) BIT
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