MX29F004T/B
TABLE 2. MX29F004T/B BUS OPERATION
Mode
Read Silicon ID
Manufacturer Code (1)
Read Silicon ID
Device Code (1)
Read
Standby
Output Disable
Write
Chip Protect with 12V
system (6)
Chip Unprotect with 12V
system (6)
Verify Chip Protect
with 12V system
Chip Protect without 12V
system (6)
Chip Unprotect without 12V
system (6)
Verify Chip Protect/Unprotect
without 12V system (7)
Reset
L
L
L
L
L
X
V
ID
(2)
L
H
H
L
X
L
H
L
L
H
X
X
X
X
X
X
X
X
H
X
X
H
X
H
X
L
H
X
X
V
ID
(2)
V
ID
(2)
H
H
H
X
X
Code (5)
X
X
Code (5)
HIGH Z
Pins
CE
L
L
L
H
L
L
L
OE
L
L
L
X
H
H
V
ID
(2)
WE
H
H
H
X
H
L
L
A0
L
H
A0
X
X
A0
X
A1
L
L
A1
X
X
A1
X
A6
X
X
A6
X
X
A6
L
A9
V
ID
(2)
V
ID
(2)
A9
X
X
A9
V
ID
(2)
Q0 ~ Q7
C2H
45H/46H
D
OUT
HIGH Z
HIGH Z
D
IN
(3)
X
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.
6. Refer to chip protect/unprotect algorithm and waveform.
Must issue "unlock for chip protect/unprotect" command before "chip protect/unprotect without 12V system"
command.
7. The "verify chip protect/unprotect without 12V system" is only following "Chip protect/unprotect without 12V
system" command.
P/N:PM0554
REV. 1.9, OCT. 19, 2004
7
MCNIX [ MACRONIX INTERNATIONAL ]
