mt29f4g08aaa Micron Semiconductor Products, mt29f4g08aaa Datasheet - Page 32

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

OTP DATA PROGRAM A0h-10h
PDF: 09005aef81b80e13/Source: 09005aef81b80eac
4gb_nand_m40a__2.fm - Rev. B 2/07 EN
OTP programming and protection are accomplished in two discrete operations. First,
using the OTP DATA PROGRAM (A0h-10h) command, an OTP page is programmed
entirely in one operation or in up to four partial-page programming sequences.
Programming can occur on other pages within the OTP area in a similar manner.
Second, the OTP area is permanently protected from further programming using the
OTP DATA PROTECT (A5h-10h) command. The pages within the OTP area can always
be read using the OTP DATA READ (AFh-30h) command, whether or not it is protected.
To determine whether or not the device is busy during an OTP operation, either monitor
R/B# or use the READ STATUS (70h) command. Use of the TWO-PLANE/MULTIPLE-
DIE READ STATUS (78h) command is prohibited during and following OTP operations.
The OTP DATA PROGRAM (A0h-10h) command is used to write data to the pages within
the OTP area. An entire page can be programmed at one time, or a page can be partially
programmed up to four times. There is no ERASE operation for the OTP pages.
The OTP DATA PROGRAM enables programming into an offset of an OTP page, using
the two bytes of column address (CA[11:0]). The command is not compatible with the
RANDOM DATA INPUT (85h) command. The OTP DATA PROGRAM command will not
execute if the OTP area has been protected.
To use the OTP DATA PROGRAM command, issue the A0h command. 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. Next, write from
1 to 2,112 bytes of data. After data input is complete, issue the 10h command. The
internal control logic automatically executes the proper programming algorithm and
controls the necessary timing for programming and verification. Program verification
only detects “1s” that are not successfully written to “0s.”
R/B# goes LOW during the duration of the array programming time (
STATUS (70h) command is the only command valid during the OTP DATA PROGRAM
operation. Bit 5 of the status register will reflect the state of R/B#. If bit 7 is “0,” then the
OTP area has been protected; otherwise, it will be a “1.”
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).
It is possible to program each OTP page a maximum of four times.
32
4Gb, 8Gb, and 16Gb x8 NAND Flash Memory
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Command Definitions
©2006 Micron Technology, Inc. All rights reserved.
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PROG). The READ