MBM29F040C
-55/-70/-90
s
LOGIC SYMBOL
Table 1
Pin
19
A
0
to A
18
DQ
0
to DQ
7
8
MBM29F040C Pin Configuration
Function
Address Inputs
Data Inputs/Outputs
Chip Enable
Output Enable
Write Enable
Device Ground
Device Power Supply
A
0
to A
18
DQ
0
to DQ
7
CE
OE
WE
V
SS
V
CC
Table 2
Operation
CE
OE
WE
MBM29F040C User Bus Operations
CE
L
L
L
H
L
L
L
L
OE
L
L
L
X
H
H
V
ID
L
H
WE
H
H
H
X
H
L
A
0
L
H
A
0
X
X
A
0
X
L
A
1
L
L
A
1
X
X
A
1
X
H
A
6
L
L
A
6
X
X
A
6
X
L
A
9
V
ID
V
ID
A
9
X
X
A
9
V
ID
V
ID
I/O
Code
Code
D
OUT
HIGH-Z
HIGH-Z
D
IN
X
Code
Auto-Select Manufacturer Code (1)
Auto-Select Device Code (1)
Read (3)
Standby
Output Disable
Write (Program/Erase)
Enable Sector Protection (2)
Verify Sector Protection (2)
Legend:
L = V
IL
, H = V
IH
, X = V
IL
or V
IH
,
= Pulse Input. See DC Characteristics for voltage levels.
Notes:
1. Manufacturer and device codes may also be accessed via a command register write sequence. See
Table 5.
2. Refer to the section on Sector Protection.
3. WE can be V
IL
if OE is V
IL
, OE at V
IH
initiates the write operations.
7
SPANSION [ SPANSION ]
