256Mb and 512Mb (256Mb/256Mb), P30-65nm
Device Command Bus Cycles
Device Command Bus Cycles
Device operations are initiated by writing specific device commands to the command
user interface (CUI). Several commands are used to modify array data including Word
Program and Block Erase commands. Writing either command to the CUI initiates a se-
quence of internally timed functions that culminate in the completion of the requested
task. However, the operation can be aborted by either asserting RST# or by issuing an
appropriate suspend command.
Table 11: Command Bus Cycles
First Bus Cycle
Second Bus Cycle
Bus
Cycles
Mode
Command
Op
Addr1
DnA
DnA
DnA
DnA
DnA
WA
Data2
Op
–
Addr1
Data2
Read
Read Array
1
≥2
≥2
2
Write
Write
Write
Write
Write
Write
Write
Write
0xFF
0x90
0x98
0x70
0x50
0x40
0xE8
0x80
–
–
Read Device Identifier
Read CFI
Read
DBA + IA
ID
Read DBA + CFI-A
CFI-D
SRD
–
Read Status Register
Clear Status Register
Word Program
Buffered Program3
Read
–
DnA
–
1
Program
2
Write
Write
Write
WA
WA
WA
WD
N - 1
0xD0
>2
>2
WA
Buffered Enhanced Factory
Program (BEFP)4
WA
Erase
Block Erase
2
1
1
2
2
2
2
2
2
2
2
2
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
BA
DnA
DnA
BA
0x20
0xB0
0xD0
0x60
0x60
0x60
0x60
0x60
0x60
0xC0
0xC0
0x60
Write
–
BA
–
0xD0
–
Suspend
Program/Erase Suspend
Program/Erase Resume
Block Lock
–
–
–
Block
Locking/
Unlocking
Write
Write
Write
Write
Write
Write
Write
Write
Write
BA
0x01
0xD0
0x2F
0x01
0xD0
0x2F
OTP-D
LRD
0x03
Block Unlock
BA
BA
Block Lock-down
Block Lock
BA
BA
Protection
BA
BA
Block Unlock
BA
BA
Block Lock-down
Program OTP register
Program Lock Register
BA
BA
PRA
LRA
RCD
OTP-RA
LRA
RCD
Configuration Configure Read
Configuration Register
Block Blank Check
Blank Check
EFI
2
Write
Write
BA
0xBC
0xEB
Write
Write
BA
D0
Extended Function
Interface command 5
>2
WA
WA
Sub-Op code
1. First command cycle address should be the same as the operation’s target address. DBA
= Device base address (needed for dual die 512Mb device); DnA = Address within the de-
vice; IA = Identification code address offset; CFI-A = Read CFI address offset; WA = Word
address of memory location to be written; BA = Address within the block; OTP-RA = Pro-
tection register address; LRA = Lock register address; RCD = Read configuration register
data on A[16:1] for Easy BGA and TSOP, A[15:0] for QUAD+ package.
Notes:
PDF: 09005aef84566799
p30_65nm_MLC_256Mb-512mb.pdf - Rev. A 1/13 EN
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