mt29f4g08aaa Micron Semiconductor Products, mt29f4g08aaa Datasheet - Page 34

• Manufacturer Part Number: mt29f4g08aaa
• Description: 4gb, 8gb, And 16gb X8 Nand Flash Memory
• Manufacturer: Micron Semiconductor Products

OTP DATA PROTECT A5h-10h
Figure 24:
OTP DATA READ AFh-30h
PDF: 09005aef81b80e13/Source: 09005aef81b80eac
4gb_nand_m40a__2.fm - Rev. B 2/07 EN
WE#
R/B#
I/Ox
CE#
ALE
RE#
CLE
OTP DATA PROTECT
command
OTP DATA PROTECT Operation
A5h
t WC
Notes:
00h
Col
The OTP DATA PROTECT (A5h-10h) command is used to protect all the data in the OTP
area. After the data is protected it cannot be programmed further. When the OTP area is
protected, the pages within the area are no longer programmable and cannot be unpro-
tected.
To use the OTP DATA PROTECT command, issue the A5h command. Next, issue the
following 5 ADDRESS cycles: 00h-00h-01h-00h-00h. Finally, issue the 10h command.
R/B# goes LOW while the OTP area is being protected. The protect command duration is
similar to a normal page programming operation,
command is the only command valid during the OTP DATA PROTECT operation. Bit 5 of
the status register will reflect the state of R/B#.
When the device is ready, read bit 0 of the status register to determine if the operation
passed or failed (see Table 9 on page 26).
1. OTP data is protected following “good” status confirmation.
The OTP DATA READ (AFh-30h) command is used to read data from a page within the
OTP area. An OTP page within the OTP area is available for reading data whether or not
the area is protected.
To use the OTP DATA READ command, issue the AFh command. Next, issue 5 ADDRESS
cycles: the first 2 ADDRESS cycles are the column address, and for the remaining 3
cycles select a page in the range of 02h-00h-00h through 0Bh-00h-00h. Finally, issue the
30h command.
00h
Col
01h
00h
00h
34
4Gb, 8Gb, and 16Gb x8 NAND Flash Memory
PROGRAM
command
10h
t WB
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t PROG
t
PROG. The READ STATUS (70h)
Command Definitions
READ STATUS
command
OTP data protected
©2006 Micron Technology, Inc. All rights reserved.
70h
Don’t Care
Status
1