参数资料
型号: MT28F320A18
厂商: Micron Technology, Inc.
英文描述: FLASH MEMORY
中文描述: 闪存
文件页数: 9/37页
文件大小: 558K
代理商: MT28F320A18
2 MEG x 16
1.8V ENHANCED+ BOOT BLOCK FLASH MEMORY
PRELIMINARY
2 Meg x 16, 1.8V Enhanced+ Boot Block Flash Memory
MT28F320A18_3.fm - Rev. 3, Pub. 9/2002
2002, Micron Technology Inc.
9
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 (V
IL
), and WE# and RP# must be at a logic HIGH
level (V
IH
) 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.
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”
Table 4:
Command Definitions
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
FIRST BUS CYCLE
SECOND BUS CYCLE
OPERATION
WRITE
WRITE
ADDRESS
X
X
DATA
FFh
90h
OPERATION
READ
READ
ADDRESS
WA
IA
DATA
AD
ID
WRITE
WRITE
WRITE
WRITE
WRITE
X
X
X
X
X
70h
50h
98h
20h
READ
READ
WRITE
WRITE
SRD
QD
D0h
WD
QA
BA
WA
40h/10h
WRITE
WRITE
X
X
B0h
D0h
WRITE
WRITE
WRITE
WRITE
X
X
X
X
60h
60h
60h
C0h
WRITE
WRITE
WRITE
WRITE
BA
BA
BA
PA
01h
D0h
2Fh
PD
WRITE
X
C0h
WRITE
LPA
FFFDh
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