MT29F1G08ABBHC-ET Micron, MT29F1G08ABBHC-ET Datasheet - Page 35

• Manufacturer Part Number: MT29F1G08ABBHC-ET
• Description: NAND Flash Memory; Density: 1Gb; Organization: 128Mbx8; Bits/Cell: SLC; I/O: Common; Supply Voltage: 1.8V; Operating Temperature Range: -40° to +85°C; Package: 63-VFBGA
• Manufacturer: Micron

One-Time Programmable (OTP) Area
OTP DATA PROGRAM A0h-10h
PDF: 09005aef81dc05df / Source: 09005aef821d5f08
1gb_nand_m48a__2.fm - Rev. E 1/08 EN
This Micron NAND Flash device offers a protected, one-time programmable NAND
Flash memory area. Ten full pages (2,112 bytes or 1,056 words per page) of OTP data is
available on the device, and the entire range is guaranteed to be good. The OTP area is
accessible only through the OTP commands. Customers can use the OTP area in any way
they desire; typical uses include programming serial numbers or other data for perma-
nent storage.
In Micron NAND Flash devices, the OTP area leaves the factory in an unwritten state
(each OTP bit is “1”). Programming or partial-page programming enables the user to
program only “0” bits in the OTP area. The OTP area cannot be erased, even if it is not
protected. Protecting the OTP area simply prevents further programming of the OTP
area.
While the OTP area is referred to as “one-time programmable,” Micron provides a
unique way to program and verify data—before permanently protecting it and prevent-
ing future changes.
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. Pro-
gramming 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.
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 OTP DATA PROGRAM command will not
execute if the OTP area has been protected. If the OTP area is protected, the busy time
for the OTP DATA PROGRAM operation is
To use the OTP DATA PROGRAM command, issue the A0h command. Issue 4 ADDRESS
cycles: the first 2 ADDRESS cycles are the column address, and for the remaining 2 cycles
select a page in the 02h–0Bh range. Next, write the data: from 1 to 2,112 bytes (x8 device),
or from 1 to 1,056 words (x16 device). After data input is complete, issue the 10h com-
mand. The internal control logic automatically executes the proper programming algo-
rithm and controls the necessary timing for programming and verification. Program
verification only detects “1”s that are not successfully written to “0”s.
RANDOM DATA INPUT (85h) commands are supported during OTP DATA PROGRAM
operations only if the OTP area is unprotected.
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. For this operation, bits 5 and 6 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 29).
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Micron Technology, Inc., reserves the right to change products or specifications without notice.
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Command Definitions
©2006 Micron Technology, Inc. All rights reserved.
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