ES29LV160F Datasheet, PDF (26/71 Pages) Excel Semiconductor Inc. – 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

ES29LV160F
Excel Semiconductor Inc.
The reset command may be written between the sequence cycles in an erase command sequence
before erasing begins. This resets the device to reading array data. Once erasure begins, however,
the device ignores reset commands until the operation is complete.
The reset command may be written between the sequence cycles in a program command
sequence before programming begins. This resets the device to reading array data (also applies to
programming in Erase Suspend mode). Once programming begins, however, the device ignores
reset commands until the operation 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).
9.3 Autoselect Command Sequence
The autoselect command sequence allows the host system to access the manufacturer and
devices codes, and determine whether or not a sector is protected. Table 10.1 on page 32 shows
the address and data requirements. This method is an alternative to that shown in Table 7.4 on
page 17, which is intended for PROM programmers and requires VID on address bit A9.
The autoselect command sequence is initiated by writing two unlock cycles, followed 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 02h in
word mode (or 04h in byte mode) returns 01h if that sector is protected, or 00h if it is unprotected.
Refer to Table 7.2 on page 15 and Table 7.3 on page 16 for valid sector addresses.
The system must write the reset command to exit the autoselect mode and return to reading array
data.
9.4 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
required to provide further controls or timings. The device automatically generates the program
pulses and verifies the programmed cell margin. Table 10.1 on page 32 shows the address and
data requirements for the byte program command sequence.
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