MT28F160A3 Micron Technology, MT28F160A3 Datasheet - Page 14

• Manufacturer Part Number: MT28F160A3
• Description: FLASH MEMORY
• Manufacturer: Micron Technology

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DataSheet
NOTE: 1. Full status register check can be done after each block or after a sequence of blocks.
1 Meg x 16 Enhanced Boot Block Flash Memory
MT28F160A3_3.p65 – Rev. 3, Pub. 8/01
FULL STATUS REGISTER CHECK FLOW
4
Automated BLOCK ERASE Flowchart
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.com
CONFIRM Command
BLOCK ERASE Passed
Read Status Register
Read Status Register
Issue Block Address
Full Status Register
Issue ERASE SETUP
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 full
Check (optional)
BLOCK ERASE
status is checked.
SR4 = 1 and
and ERASE
Command
Completed
SR7 = 1?
SR1 = 0?
SR3 = 0?
SR5 = 1?
SR5 = 0?
Start
Bits
Bits
YES
YES
YES
YES
NO
1
Figure 4
NO
YES
NO
NO
NO
Command Sequence
BLOCK ERASE Failed
on a Locked Block
ERASE Attempted
V
PP
SUSPEND?
NO
ERASE
Range Error
Error
SUSPEND Loop
YES
ERASE
ENHANCED BOOT BLOCK FLASH MEMORY
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14
Standby
Standby
Standby
Standby
BUS
OPERATION COMMAND
WRITE
WRITE
READ
Standby
Repeat for subsequent blocks.
Write FFh after the last BLOCK ERASE operation to reset the
device to read array mode.
BUS
OPERATION COMMAND
Micron Technology, Inc., reserves the right to change products or specifications without notice.
WRITE
ERASE
SETUP
ERASE
COMMENTS
Data = 20h
Addr = Don’t Care
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
COMMENTS
Check SR1
1 = Detect locked block
Check SR3
1 = Detect V
Check SR4 and SR5
1 = BLOCK ERASE command
Check SR5
1 = BLOCK ERASE error
error
1 MEG x 16
2
3
©2001, Micron Technology, Inc.
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