EN25QH32
Read Unique ID Number
The Read Unique ID Number instruction accesses a factory-set read-only 96-bit number that is unique
to each EN25QH32 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 27.
Table 10. Unique ID Number
Address (h)
(Byte Mode)
Address
(Bit)
Description
Data
Comment
Unique ID Number
80h : 8Bh
95 : 00
By die
Power-up Timing
Figure 28. Power-up Timing
Table 11. Power-Up Timing and Write Inhibit Threshold
Symbol
Parameter
Min.
10
1
Max.
Unit
(1)
t
VCC(min) to CS# low
µs
ms
V
VSL
(1)
t
Time delay to Write instruction
Write Inhibit Voltage
10
PUW
(1)
1
2.5
VWI
Note:
1.The parameters are characterized only.
2. VCC (max.) is 3.6V and VCC (min.) is 2.7V
INITIAL DELIVERY STATE
The device is delivered with the memory array erased: all bits are set to 1 (each byte contains FFh).
The Status Register contains 00h (all Status Register bits are 0).
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc., www.eonssi.com
50
Rev. E, Issue Date: 2012/01/30
EON [ EON SILICON SOLUTION INC. ]
