256Mb: 3V Embedded Parallel NOR Flash
Standard Command Definitions – Address-Data Cycles
Table 14: Standard Command Definitions – Address-Data Cycles, 16-Bit (Continued)
Note 1 applies to entire table
Address and Data Cycles
3rd 4th
1st
2nd
5th
6th
Command and
Code/Subcode
Bus
Size
A
D
A
D
A
D
A
D
A
D
A
D
Notes
ENHANCED
BUFFERED
x16 BAd
(00)
29
PROGRAM CONFIRM
(29h)
EXIT ENHANCED
BUFFERED
x16
X
90
X
00
PROGRAM
COMMAND SET (90h)
PROGRAM SUSPEND
(B0h)
x16 BKA
x16 BKA
B0
30
B0
30
PROGRAM RESUME
(30h)
WRITE TO BUFFER PRO- x16 BAd
GRAM SUSPEND (B0h)
WRITE TO BUFFER PRO- x16 BAd
GRAM RESUME (30h)
ERASE Operations
CHIP ERASE (80/10h)
x16
x16
555
X
AA 2AA
80
55
10
555
555
80
80
555
555
AA
AA
2AA
2AA
55
55
555
10
30
UNLOCK BYPASS
CHIP ERASE (80/10h)
X
5
BLOCK ERASE (80/30h)
x16
x16
555
X
AA 2AA
55
30
BAd
10
5
UNLOCK BYPASS
80
BAd
BLOCK ERASE (80/30h)
ERASE SUSPEND (B0h)
ERASE RESUME (30h)
x16 BKA
x16 BKA
B0
30
1. A = Address; D = Data; X = "Don't Care;" BKA = Bank address; BAd = Any address in the
block; N = Number of bytes to be programmed; PA = Program address; PD = Program
data; Gray shading = Not applicable. All values in the table are hexadecimal. Some com-
mands require both a command code and subcode.
Notes:
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. BAd must be the same as the address loaded during the WRITE TO BUFFER PROGRAM
3rd and 4th cycles.
7. WRITE TO BUFFER PROGRAM operation: maximum cycles 36 (x16). UNLOCK BYPASS
WRITE TO BUFFER PROGRAM operation: maximum cycles = 34 (x16). WRITE TO BUFFER
PDF: 09005aef84ecabef
m29dw_256g.pdf - Rev. A 10/12 EN
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