MX29LV033A ETC-unknow, MX29LV033A Datasheet - Page 14

• Manufacturer Part Number: MX29LV033A
• Description: 32m-bit [4m X 8] Cmos Equal Sector Flash Memory
• Manufacturer: ETC-unknow

Table 2 shows the address and data requirements. This
method is an alternative to that shown in Table 1, which
is intended for PROM programmers and requires VID on
address bit A9.
The SILICON ID READ command sequence is initiated
by writing two unlock cycles, followed by the SILICON
ID READ command. The device then enters the SILI-
CON ID READ mode, and the system may read at any
address any number of times, without initiating another
command sequence. A read cycle at address XX00h re-
trieves 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 returns 01h if
that sector is protected, or 00h if it is unprotected. Refer
to Table for valid sector addresses.
The system must write the reset command to exit the
auto-select mode and return to reading array data.
BYTE PROGRAM COMMAND SEQUENCE
The device programs one byte of data for each program
operation. The command sequence requires four bus
cycles, and 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 1 shows the address
and data requirements for the byte program command
sequence.
When the Embedded Program algorithm is complete, the
device then returns to reading array data and addresses
are no longer latched. The system can determine the sta-
tus of the program operation by using Q7, Q6, or RY/BY#.
See "Write Operation Status" for information on these
status bits.
Any commands written to the device during the Embed-
ded Program Algorithm are ignored. Note that a hardware
reset immediately terminates the programming operation.
The Byte Program command sequence should be
reinitiated once the device has reset 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
P/N:PM1017
14
"0" back to a "1". Attempting to do so may halt the op-
eration and set Q5 to "1", or cause the Data# Polling
algorithm to indicate the operation was successful. How-
ever, a succeeding read will show that the data is still
"0". Only erase operations can convert a "0" to a "1".
MX29LV033A
REV. 1.0, SEP. 20, 2004