EN25F05_1 Datasheet, PDF (21/32 Pages) Eon Silicon Solution Inc. – 512 Kbit Serial Flash Memory with 4Kbytes Uniform Sector

EN25F05
When Chip Select is driven High, the device is put in the Standby Power mode. Once in the Standby
Power mode, the device waits to be selected, so that it can receive, decode and execute instructions.
Figure 19. Read Identification (RDID)
Enter OTP Mode (3Ah)
This Flash has an extra 256 bytes OTP sector, user must issue ENTER OTP MODE command to read,
program or erase OTP sector. After entering OTP mode, the OTP sector is mapping to sector 15, SRP
bit becomes OTP_LOCK bit and can be read with RDSR command. Program / Erase command will be
disabled when OTP_LOCK is ‘1’
WRSR command will ignore the input data and program LOCK_BIT to 1.
User must clear the protect bits before enter OTP mode.
OTP sector can only be program and erase when LOCK_BIT equal ‘0’ and BP [2:0] = ‘000’. In OTP
mode, user can read other sectors, but program/erase other sectors only allowed when OTP_LOCK
equal ‘0’.
User can use WRDI (04h) command to exit OTP mode.
Table 7. OTP Sector Address
Sector
15
Sector Size
256 byte
Address Range
00F000h – 00F0FFh
Note: The OTP sector is mapping to sector 15
This Data Sheet may be revised by subsequent versions
21
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc.,
Rev. D, Issue Date: 2010/04/15
www.eonssi.com