32Mb, 64Mb, 128Mb: 3V Embedded Parallel NOR Flash
Standard Command Definitions – Address-Data Cycles
two bytes/words; PA4 = Program address with constant AMAX:A1 for x8 or AMAX:A2
for x16, which should be used four times to select adjacent four bytes/words; PA8 = Pro-
gram address with constant AMAX:A2 for x8, which should be used eight times to select
adjacent eight bytes; PD = Program data; Gray shading = Not applicable. All values in
the table are hexadecimal. Some commands require both a command code and sub-
code.
2. These cells represent READ cycles (versus WRITE cycles for the others).
3. AUTO SELECT enables the device to read the manufacturer code, device code, block pro-
tection status, and extended memory block protection indicator.
4. AUTO SELECT addresses and data are specified in the Electronic Signature table and the
Extended Memory Block Protection table.
5. For any UNLOCK BYPASS ERASE/PROGRAM command, the first two UNLOCK cycles are
unnecessary.
6. This command is only for x8 devices.
7. BAd must be the same as the address loaded during the WRITE TO BUFFER PROGRAM
3rd and 4th cycles.
8. WRITE TO BUFFER PROGRAM operation: maximum cycles = 261 (x8) and 261 (x16). UN-
LOCK BYPASS WRITE TO BUFFER PROGRAM operation: maximum cycles = 259 (x8), 259
(x16). WRITE TO BUFFER PROGRAM operation: N + 1 = bytes to be programmed; maxi-
mum buffer size = 256 bytes (x8) and 512 bytes (x16).
9. For x8, A[MAX:7] address pins should remain unchanged while A[6:0] and A-1 pins are
used to select a byte within the N + 1 byte page. For x16, A[MAX:8] address pins should
remain unchanged while A[7:0] pins are used to select a word within the N+1 word
page.
10. This command is only for x16 devices. For ENHANCED WRITE TO BUFFER PROGRAM op-
eration, total cycles = 259. For UNLOCK BYPASS ENHANCED WRITE TO BUFFER PRO-
GRAM operation, total cycles = 257.
11. BLOCK ERASE address cycles can extend beyond six address-data cycles, depending on
the number of blocks to erase.
PDF: 09005aef84dc44a7
m29ew_32Mb-128Mb.pdf - Rev. B 11/12 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
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