EN25S80A Datasheet, PDF (46/66 Pages) Eon Silicon Solution Inc. – 8 Megabit 1.8V Serial Flash Memory with 4Kbyte Uniform Sector

EN25S80A
OTP sector can only be program and erase before OTP_LOCK bit is set to ‘1’ and BP [3:0] = ‘0000’ In
OTP mode, user can read other sectors, but program/erase other sectors only allowed when
OTP_LOCK bit equal to ‘0’.
User can use WRDI (04H) command to exit OTP mode.
Erase OTP Command (20h)
User can use Sector Erase (20h) command only to erase OTP data.
The instruction sequence is shown in Figure 33.1 while using the Enable Quad Peripheral Interface
mode (EQPI) (38h) command.
Table 11. OTP Sector Address
Sector
Sector Size
Address Range
255
512 byte
0FF000h – 0FF1FFh
Note: The OTP sector is mapping to sector 255
Figure 33. Enter OTP Mode
Figure 33.1 Enter OTP Mode Sequence under EQPI Mode
This Data Sheet may be revised by subsequent versions
46
or modifications due to changes in technical specifications.
©2014 Eon Silicon Solution, Inc.,
Rev. J, Issue Date: 2014/01/20
www.eonssi.com