BM29F040 View Datasheet(PDF) - Winbond
Part Name
Description
Manufacturer
BM29F040 Datasheet PDF : 29 Pages
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BRIGHT
Microelectronics
Inc.
Preliminary BM29F040
BLOCK DIAGRAM
Vcc
GND
WE
State
Control
Command
Register
Erase Voltage
Generator
Program Voltage
Generator
DQ 0 - DQ 7
Input / output
Buffers
CE
OE
Vcc Detect
Timer
A 0 - A 18
Chip Enable
Output Enable
Logic
Data
latch
A
d
Y-Decode
d
r
e
s
s
X-decode
L
a
t
c
h
Y-MUX / SENSING
ARRAY
Figure 1
BUS OPERATION
Operation
CE OE WE A0
A1
A6
A9
Auto select Manufacturers ID (1) L
L
H
L
L
L
VID
Auto select Device ID (1)
L
L
H
H
L
L
VID
Read
L
L
H
A0
A1
A6
A9
Standby
H
X
X
X
X
X
X
Output Disable
L
H
H
X
X
X
X
Write
L
H
L
A0
A1
A6
A9
Enable Sector Protect
L
VID
L
X
X
X
VID
Verify Sector Protect (3)
L
L
H
L
H
L
VID
Table 4
Notes:
1. LEGENDS: L = VIL, H = VIH, X = don't care, VID = +12V.
2. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to table 6 for
Command definitions.
3. Refer to Table 4 for valid Din during a write operation.
4. Refer to the section on sector protection.
I/O
Code
Code
Dout
High Z
High Z
Din (2)
X
Code
A Winbond Company
Publication Release Date: May 1999
-5-
Revision A1
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