EN25S80A Datasheet, PDF (53/66 Pages) Eon Silicon Solution Inc. – 8 Megabit 1.8V Serial Flash Memory with 4Kbyte Uniform Sector

Read Unique ID Number
EN25S80A
The Read Unique ID Number instruction accesses a factory-set read-only 96-bit number that is unique
to each EN25S80A device. The ID number can be used in conjunction with user software methods to
help prevent copying or cloning of a system. The Read Unique ID instruction is initiated by driving the
CS# pin low and shifting the instruction code “5Ah” followed by a three bytes of addresses, 0x80h, and
one byte of dummy clocks. After which, the 96-bit ID is shifted out on the falling edge of CLK as shown
in Figure 34.
Table 14. Unique ID Number
Description
Unique ID Number
Address (h)
(Byte Mode)
80h : 8Bh
Address
(Bit)
95 : 00
Data
By die
Comment
This Data Sheet may be revised by subsequent versions
53
or modifications due to changes in technical specifications.
©2014 Eon Silicon Solution, Inc.,
Rev. J, Issue Date: 2014/01/20
www.eonssi.com