128Mb, 256Mb, 512Mb, 1Gb StrataFlash Memory
Read Operations
Issuing the READ ID command to a partition that is actively programming or erasing
changes that partition’s read mode to read ID mode. Subsequent reads from that parti-
tion will not output device information until the PROGRAM or ERASE operation has
completed.
Table 17: Device Information
Device Information
Device manufacturer code
Device ID code
Address Bus
Data Bus
0089h
Partition base address + 00h
Partition base address + 01h
Block base address + 02h
Device ID
Block lock status
D0 = Lock status
D1 = Lock-down status
Read configuration register
Extended configuration register
OTP lock register 0
Partition base address + 05h
Configuration register data
Extended configuration register data
Lock register 0 data
Partition base address + 06h
Partition base address + 80h
OTP block 0 – factory segment
Partition base address + 81h to 84h
Partition base address + 85h to 88h
Factory-programmed data
User data
OTP block 1 – user-programmable
segment
OTP lock register 1
OTP blocks 2–17
Partition base address + 89h
Lock register 1 data
User data
Partition base address + 8Ah to 109h
Read CFI
Issuing the READ CFI command places the addressed partition in read CFI mode. Sub-
sequent reads from that partition output CFI information.
The addressed partition remains in read CFI mode until a different READ command is
issued, or a PROGRAM or ERASE operation is performed, or a BLOCK LOCK SETUP
command is issued, which changes the read mode to read status register mode.
The READ CFI command functions independently of the voltage level on VPP
.
Issuing the READ CFI command to a partition that is actively programming or erasing
changes that partition’s read mode to read CFI mode. Subsequent reads from that parti-
tion will return invalid data until the PROGRAM or ERASE operation has completed.
Read Status Register
Issuing the READ STATUS REGISTER command places the addressed partition in read
status register mode; other partitions are not affected. Subsequent reads from that par-
tition output status register information.
Note: Chip enable or output enable must be toggled to update the status register data.
The addressed partition remains in read status register mode until a different READ
MODE command is issued to that partition. Performing a PROGRAM, ERASE, or BLOCK
LOCK operation also changes the partition’s read mode to read status register mode.
The READ STATUS REGISTER command functions independently of the voltage level
on VPP
.
Status register contents are valid only when SR[7]=1.
PDF: 09005aef8448483a
128_256_512_65nm_g18.pdf - Rev. F 8/11 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2011 Micron Technology, Inc. All rights reserved.
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