8Mb
SMART 3 BOOT BLOCK FLASH MEMORY
TRUTH TABLE (MT28F800B3)
1
FUNCTION
Standby
RESET
READ
READ (word mode)
READ (byte mode)
Output Disable
ERASE SETUP
ERASE CONFIRM
3
WRITE SETUP
WRITE (word mode)
4
WRITE (byte mode)
4
READ ARRAY
5
WRITE/ERASE (BOOT BLOCK)
2, 7
ERASE SETUP
ERASE CONFIRM
3
ERASE CONFIRM
3, 6
WRITE SETUP
WRITE (word mode)
4
WRITE (word mode)
4, 6
WRITE (byte mode)
4
WRITE (byte mode)
4, 6
READ ARRAY
5
DEVICE IDENTIFICATION
8, 9
Manufacturer Compatibility
(word mode)
10
Manufacturer Compatibility
(byte mode)
Device (word mode, top boot)
10
Device (byte mode, top boot)
Device (word mode, bottom boot)
10
Device (byte mode, bottom boot)
NOTE:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
RP#
H
L
H
H
H
H
H
H
H
H
H
H
V
HH
H
H
V
HH
H
V
HH
H
H
H
H
H
H
H
H
CE#
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
OE#
X
X
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
WE# WP# BYTE# A0
X
X
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
H
X
H
X
X
X
X
X
X
X
X
X
H
L
X
X
X
X
H
L
X
X
X
X
X
H
H
L
L
X
H
L
H
L
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
H
H
H
H
A9
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
V
ID
V
ID
V
ID
V
ID
V
ID
V
ID
V
PP
X
X
X
X
X
X
V
PPH
X
V
PPH
V
PPH
X
X
V
PPH
V
PPH
X
V
PPH
V
PPH
V
PPH
V
PPH
X
X
X
X
X
X
X
DQ0–DQ7 DQ8–DQ14 DQ15/A - 1
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
Data-Out Data-Out Data-Out
Data-Out High-Z
High-Z
20h
D0h
10h/40h
Data-In
Data-In
FFh
20h
D0h
D0h
10h/40h
Data-In
Data-In
Data-In
Data-In
FFh
89h
89h
9Ch
9Ch
9Dh
9Dh
High-Z
X
X
X
Data-In
X
X
X
X
X
X
Data-In
Data-In
X
X
X
00h
High-Z
88h
High-Z
88h
High-Z
A-1
High-Z
X
X
X
Data-In
A-1
X
X
X
X
X
Data-In
Data-In
A-1
A-1
X
–
X
–
X
–
X
WRITE/ERASE (EXCEPT BOOT BLOCK)
2
L = V
IL
(LOW), H = V
IH
(HIGH), X = V
IL
or V
IH
(“Don’t Care”).
V
PPH
= V
PPH1
= 3.3V or V
PPH2
= 5V.
Operation must be preceded by ERASE SETUP command.
Operation must be preceded by WRITE SETUP command.
The READ ARRAY command must be issued before reading the array after writing or erasing.
When WP# = V
IH
, RP# may be at V
IH
or V
HH
.
V
HH
= 12V.
V
ID
= 12V; may also be read by issuing the IDENTIFY DEVICE command.
A1–A8, A10–A18 = V
IL
.
Value reflects DQ8–DQ15.
8Mb Smart 3 Boot Block Flash Memory
Q10_3.p65 – Rev. 3, Pub. 10/01
5
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2001, Micron Technology, Inc.