MT28F320A18FF-70BET 查看數據表（PDF） - Micron Technology
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MT28F320A18FF-70BET Datasheet PDF : 37 Pages
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PRELIMINARY
2 MEG x 16
1.8V ENHANCED+ BOOT BLOCK FLASH MEMORY
Read Chip Protection Configuration
Register
The chip identification mode outputs four types of
information: the manufacturer/device identifier, the
block locking status, the protection register content,
and protection register lock. Two bus cycles are
required for this operation: the chip identification data
is read by entering the command code 90h on DQ0–
DQ7 and the identification code address on the
address lines.
Control signals CE# and OE# must be at a logic LOW
level (VIL), and WE# and RP# must be at a logic HIGH
level (VIH) to read data from the protection configura-
tion register. Data is available on DQ0–DQ15. To return
to read array mode, write the read array command
code FFh on DQ0–DQ7. See Table 10 for further
details.
Table 4: Command Definitions
FIRST BUS CYCLE
COMMAND
READ ARRAY
READ PROTECTION
CONFIGURATION REGISTER
READ STATUS REGISTER
CLEAR STATUS REGISTER
READ QUERY
BLOCK ERASE SETUP
PROGRAM SETUP/ALTERNATE
PROGRAM SETUP
PROGRAM/ERASE SUSPEND
PROGRAM/ERASE RESUME –
ERASE CONFIRM
LOCK BLOCK
UNLOCK BLOCK
LOCK DOWN BLOCK
PROTECTION REGISTER PROGRAM
SETUP
PROTECTION REGISTER LOCK
OPERATION
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
ADDRESS
X
X
X
X
X
X
X
X
X
X
X
X
X
X
DATA
FFh
90h
70h
50h
98h
20h
40h/10h
B0h
D0h
60h
60h
60h
C0h
C0h
WA: Word address of memory location to be written, or read
IA: Identification code address
BA: Address within the block
ID: Identification code data
SRD: Data read from the status register
QA: Query code address
QD: Query code data
WD: Data to be written at the location WA
PA: Protection register address
LPA: Lock protection register address
AD: Array data
PD: Protection register data
X: “Don’t Care”
SECOND BUS CYCLE
OPERATION
READ
READ
ADDRESS
WA
IA
DATA
AD
ID
READ
–
SRD
–
–
–
READ
QA
QD
WRITE
BA
D0h
WRITE
WA
WD
–
–
–
–
–
–
WRITE
BA
01h
WRITE
BA
D0h
WRITE
BA
2Fh
WRITE
PA
PD
WRITE
LPA
FFFDh
2 Meg x 16, 1.8V Enhanced+ Boot Block Flash Memory
MT28F320A18_3.fm - Rev. 3, Pub. 9/2002
9
©2002, Micron Technology Inc.
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