EN25S20
Table 4. Instruction Set
Instruction Name
Byte 1
Code
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
n-Bytes
Write Enable
06h
04h
Write Disable / Exit
OTP mode
Read Status
Register
Write Status
Register
(3)
05h
01h
03h
(S7-S0)
S7-S0
(4)
continuous
(Next
byte)
Read Data
A23-A16
A15-A8
A7-A0
(D7-D0)
continuous
(Next Byte)
continuous
Fast Read
A23-A16
A23-A16
A23-A16
A23-A16
A15-A8
A15-A8
A15-A8
A15-A8
A7-A0
A7-A0
A7-A0
A7-A0
dummy
D7-D0
(D7-D0)
0Bh
02h
20h
Next byte continuous
Page Program
Sector Erase / OTP
erase
Block Erase
D8h
Chip Erase
C7h/ 60h
B9h
Deep Power-down
(5)
Release from Deep
Power-down, and
read Device ID
Release from Deep
Power-down
dummy
dummy
dummy
(ID7-ID0)
ABh
00h
01h
(M7-M0)
(ID7-ID0)
(ID7-ID0) (6)
(M7-M0)
Manufacturer/
Device ID
dummy
dummy
90h
(ID15-ID8)
(ID7-ID0) (7)
(M7-M0)
Read Identification
Enter OTP mode
9Fh
3Ah
Notes:
1. (BR7-BR0) : The output data of block protection register.
2. The Block Protection Registers contents will repeat continuously until CS# terminates the instruction.
3. Data bytes are shifted with Most Significant Bit first. Byte fields with data in parenthesis “( )” indicate data being read from the
device on the DO pin.
4. The Status Register contents will repeat continuously until CS# terminate the instruction.
5. The Device ID will repeat continuously until CS# terminates the instruction.
6. The Manufacturer ID and Device ID bytes will repeat continuously until CS# terminates the instruction.
00h on Byte 4 starts with MID and alternate with DID, 01h on Byte 4 starts with DID and alternate with MID.
7. (M7-M0) : Manufacturer, (ID15-ID8) : Memory Type, (ID7-ID0) : Memory Capacity.
Table 5. Manufacturer and Device Identification
OP Code
ABh
(M7-M0)
(ID15-ID0)
(ID7-ID0)
71
71
90h
1Ch
1Ch
9Fh
3812h
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
10
Rev. H, Issue Date: 2011/11/07
EON [ EON SILICON SOLUTION INC. ]
