MT28F320A18 Micron Technology, MT28F320A18 Datasheet - Page 22

• Manufacturer Part Number: MT28F320A18
• Description: FLASH MEMORY
• Manufacturer: Micron Technology

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DataSheet
Notes: 1. Full status register check can be done after each block or after a sequence of blocks.
2 Meg x 16, 1.8V Enhanced+ Boot Block Flash Memory
MT28F320A18_F.fm – Rev F 08/03 EN
FULL STATUS REGISTER CHECK FLOW
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Figure 6: BLOCK ERASE Flowchart
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CONFIRM Command
BLOCK ERASE Passed
Read Status Register
Read Status Register
Issue BLOCK ERASE
Full Status Register
Issue ERASE SETUP
and Block Address
2. SR3 must be cleared before attempting additional PROGRAM/ERASE operations.
3. SR5 is cleared only by the CLEAR STATUS REGISTER command in cases where multiple blocks are erased before
Check (optional)
Command and
Block Address
BLOCK ERASE
Completed
full status is checked.
SR 7 = 1?
SR1 = 0?
SR3 = 0?
SR5 = 0?
Start
Bits
Bits
YES
YES
YES
YES
1
NO
NO
NO
NO
BLOCK ERASE Failed
on a Locked Block
ERASE Attempted
V
PP
SUSPEND?
NO
ERASE
Range Error
1.8V ENHANCED+ BOOT BLOCK FLASH MEMORY
SUSPEND Loop
YES
ERASE
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BUS
OPERATION COMMAND
WRITE
WRITE
READ
Standby
Repeat for subsequent blocks.
Write FFh after the last BLOCK ERASE operation to return
the device to read array mode.
BUS
OPERATION COMMAND
Standby
Standby
Standby
Standby
WRITE ERASE
SETUP
ERASE
COMMENTS
COMMENTS
Data = 20h
Block Addr = Address
within block to be
erased
Data = D0h
Block Addr = Address
within block to be
erased
Status register data
Toggle OE# or CE# to
update status register.
Check SR7
1 = Ready, 0 = Busy
Check SR1
1 = Detect locked
block
Check SR3
1 = Detect Vpp block
Check SR4 and SR5
1 = Block erase
command error
Check SR5
1 = Block erase error
2 MEG x 16
©2003 Micron Technology Inc.
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