MX29F040
TABLE 2. MX29F040 BUS OPERATION
Mode
Read Silicon ID
Manufacturer Code(1)
Read Silicon ID
Device Code(1)
Read
Standby
Output Disable
Write
Sector Protect with 12V
system(6)
Chip Unprotect with 12V
system(6)
Verify Sector Protect
with 12V system
Sector Protect without 12V
system (6)
Chip Unprotect without 12V
system (6)
Verify Sector Protect/Unprotect
without 12V system (7)
Reset
X
X
X
X
X
X
X
HIGH Z
L
L
H
X
H
X
H
Code(5)
L
H
L
X
X
H
H
X
L
H
L
X
X
L
H
X
L
L
H
X
H
X
V
ID
(2)
Code(5)
L
V
ID
(2)
L
X
X
H
V
ID
(2)
X
L
H
L
L
L
L
X
H
H
V
ID
(2)
H
X
H
L
L
A0
X
X
A0
X
A1
X
X
A1
X
A6
X
X
A6
L
A9
X
X
A9
V
ID
(2)
D
OUT
HIGH Z
HIGH Z
D
IN
(3)
X
L
L
H
H
L
X
V
ID
(2)
A4H
Pins
CE
L
OE
L
WE
H
A0
L
A1
L
A6
X
A9
V
ID
(2)
Q0 ~ Q7
C2H
NOTES:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 1.
2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V.
3. Refer to Table 1 for valid Data-In during a write operation.
4. X can be VIL or VIH.
5. Code=00H means unprotected.
Code=01H means protected.
A18~A16=Sector address for sector protect.
6. Refer to sector protect/unprotect algorithm and waveform.
Must issue "unlock for sector protect/unprotect" command before "sector protect/unprotect without 12V system" command.
7. The "verify sector protect/unprotect without 12V system" is only following "Sector protect/unprotect without 12V system"
command.
P/N:PM0538
REV. 2.3, DEC. 10, 2004
6
MCNIX [ MACRONIX INTERNATIONAL ]
