EN25B40
Table 4. Instruction Set
Instruction Name
Byte 1
Code
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
n-Bytes
Write Enable
Write Disable
06h
04h
continuous
(2)
Read Status
Register
Write Status
Register
(1)
05h
(S7-S0)
S7-S0
01h
03h
0Bh
A23-A16
A23-A16
A15-A8
A15-A8
A7-A0
A7-A0
(D7-D0)
dummy
D7-D0
(Next byte)
(D7-D0)
Read Data
continuous
(Next Byte)
continuous
Fast Read
A23-A16
A23-A16
A15-A8
A15-A8
A7-A0
A7-A0
(Next byte)
continuous
Page Program
Sector Erase
02h
D8h
Bulk Erase
C7h
B9h
Deep Power-down
(4)
Release from Deep
Power-down, and
read Device ID
Release from Deep
Power-down
Manufacturer/
Device ID
Read Identification
dummy
dummy
dummy
(ID7-ID0)
(M7-M0)
ABh
90h
9Fh
(5)
dummy
dummy
(ID7-ID0)
00h
(ID15-ID8)
(ID7-ID0)
(M7-M0)
Notes:
1. 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.
2. The Status Register contents will repeat continuously until CS# terminate the instruction.
3. All sectors may use any address within the sector.
4. The Device ID will repeat continuously until CS# terminate the instruction.
5. The Manufacturer ID and Device ID bytes will repeat continuously until CS# terminate the instruction.
00h on Byte 4 starts with MID and alternate with DID, 01h on Byte 4 starts with DID and alternate with MID.
Table 5. Manufacturer and Device Identification
Boot Type
OP Code
(M7-M0)
(ID15-ID0)
2013h
(ID7-ID0)
32h
ABh
EN25B40(Bottom Boot)
90h
1Ch
1Ch
32h
9Fh
ABh
42h
42h
EN25B40T(Top Boot)
90h
1Ch
1Ch
9Fh
2013h
Write Enable (WREN) (06h)
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc., www.essi.com.tw
10
Rev. E, Issue Date: 2007/5/3
EON [ EON SILICON SOLUTION INC. ]
