參數(shù)資料
              型號(hào): AM29LV160MB50EI
              廠商: Advanced Micro Devices, Inc.
              英文描述: 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) MirrorBit TM 3.0 Volt-only Boot Sector Flash Memory
              中文描述: 16兆位(2米× 8位/ 1個(gè)M x 16位)的MirrorBit?3.0伏,只引導(dǎo)扇區(qū)閃存
              文件頁(yè)數(shù): 26/63頁(yè)
              文件大?。?/td> 967K
              代理商: AM29LV160MB50EI
              24
              Am29LV160M
              25974B5 January31,2007
              D a t a S h e e t
              programming begins, however, the device ignores reset commands until the op-
              eration is complete.
              The reset command may be written between the sequence cycles in an autoselect
              command sequence. Once in the autoselect mode, the reset command
              must
              be
              written to return to reading array data (also applies to autoselect during Erase
              Suspend).
              If DQ5 goes high during a program or erase operation, writing the reset command
              returns the device to reading array data (also applies during Erase Suspend).
              Autoselect Command Sequence
              The autoselect command sequence allows the host system to access the manu-
              facturer and devices codes, and determine whether or not a sector is protected.
              Table 10, on page 31
              and
              Table 11, on page 32
              show the address and data re-
              quirements. This method is an alternative to that shown in
              Table 4, on page 15
              ,
              which is intended for PROM programmers and requires V
              ID
              on address bit A9.
              The autoselect command sequence is initiated by writing two unlock cycles, fol-
              lowed by the autoselect command. The device then enters the autoselect mode,
              and the system may read at any address any number of times, without initiating
              another command sequence.
              A read cycle at address XX00h retrieves the manufacturer code. A read cycle at
              address XX01h returns the device code. A read cycle containing a sector address
              (SA) and the address XX02h in word mode (or XX04h in byte mode) returns
              XX01h if that sector is protected, or 00h if it is unprotected. Refer to
              Table 2, on
              page 13
              and
              Table 3, on page 14
              for valid sector addresses.
              The system must write the reset command to exit the autoselect mode and return
              to reading array data.
              Word/Byte Program Command Sequence
              The system may program the device by word or byte, depending on the state
              of the BYTE# pin. Programming is a four-bus-cycle operation. The program
              command sequence is initiated by writing two unlock write cycles, followed by
              the program set-up command. The program address and data are written next,
              which in turn initiate the Embedded Program algorithm. The system is
              not
              re-
              quired to provide further controls or timings. The device automatically
              generates the program pulses and verifies the programmed cell margin.
              Table 10, on page 31
              and
              Table 11, on page 32
              show the address and data re-
              quirements for the byte program command sequence.
              Note that the Secured
              Silicon Sector, autoselect, and CFI functions are unavailable when a program
              operation is in progress.
              When the Embedded Program algorithm is complete, the device then returns to
              reading array data and addresses are no longer latched. The system can deter-
              mine the status of the program operation by using DQ7, DQ6, or RY/BY#. See
              “Write Operation Status” on page 33
              for information on these status bits.
              Any commands written to the device during the Embedded Program Algorithm
              are ignored. Note that a
              hardw are reset
              immediately terminates the program-
              ming operation. The Byte Program command sequence should be reinitiated once
              the device resets to reading array data, to ensure data integrity.
              Programming is allowed in any sequence and across sector boundaries.
              A bit
              cannot be programmed from a “ 0” back to a “ 1” .
              Attempting to do so may
              halt the operation and set DQ5 to “1,” or cause the Data# Polling algorithm to
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