128Mb, 64Mb, 32Mb
Q-FLASH MEMORY
COMMANDDEFINITIONS
When the VPEN voltage is less than VPPLK, only READ
operations from the status register, query, identifier
codes, or blocks are enabled. Placing VPENH on VPEN en-
ables BLOCK ERASE, PROGRAM, and LOCK BIT CON-
FIGURATION operations. Device operations are se-
lected by writing specific commands into the CEL, as
seen in Table 4.
Table 4
Micron Q-Flash Memory Command Set Definitions
1
COMMAND
SCALABLE
OR BASIC CYCLES
BUS
FIRST BUS CYCLE
SECOND BUS CYCLE
COMMAND REQ’D
2
3
4
5, 6
3
4
5, 6
SET
OPER
ADDR DATA
OPER
ADDR DATA
NOTES*
READ ARRAY
SCS/BCS
SCS/BCS
1
WRITE
WRITE
X
X
FFh
READ IDENTIFIER
CODES
ꢀ 2
90h
READ
IA
ID
7
READ QUERY
SCS
ꢀ 2
WRITE
WRITE
X
X
98h
70h
READ
READ
QA
X
QD
READ STATUS
REGISTER
SCS/BCS
2
SRD
8
CLEAR STATUS
REGISTER
SCS/BCS
1
WRITE
X
50h
E8h
WRITE TO BUFFER
SCS/BCS
SCS/BCS
> 2
2
WRITE
WRITE
BA
X
WRITE
WRITE
BA
PA
N
9, 10, 11
12, 13
WORD/BYTE
PROGRAM
40h
or
PD
10h
BLOCK ERASE
SCS/BCS
SCS/BCS
2
1
WRITE
WRITE
BA
X
20h
B0h
WRITE
BA
D0h
11, 12
12, 14
BLOCK ERASE,
PROGRAM SUSPEND
BLOCK ERASE,
SCS/BCS
1
WRITE
X
D0h
12
PROGRAM RESUME
CONFIGURATION
SCS
SCS
SCS
2
2
2
WRITE
WRITE
WRITE
X
X
X
B8h
60h
60h
WRITE
WRITE
WRITE
X
BA
X
CC
01h
D0h
SET BLOCK LOCK BITS
CLEAR BLOCK
LOCK BITS
15
PROTECTION
PROGRAM
2
WRITE
X
C0h
WRITE
PA
PD
*Notes appear on the next page.
128Mb, 64Mb, 32MbQ-FlashMemory
MT28F640J3_7.p65 – Rev. 6, Pub. 8/02
MicronTechnology,Inc.,reservestherighttochangeproductsorspecificationswithoutnotice.
©2002,MicronTechnology,Inc.
11
MICRON [ MICRON TECHNOLOGY ]
