MT28F008B5 Micron Technology, MT28F008B5 Datasheet - Page 24

• Manufacturer Part Number: MT28F008B5
• Description: (MT28F008B5 / MT28F800B5) FLASH MEMORY
• Manufacturer: Micron Technology

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DataSheet
SPEED-DEPENDENT WRITE/ERASE AC TIMING CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS: WE#- (CE#-)CONTROLLED WRITES
Commercial Temperature (0ºC
WORD/BYTE WRITE AND ERASE DURATION CHARACTERISTICS
Notes: 1. Measured with V
8Mb Smart 5 Boot Block Flash Memory
MT28F800B5_3.fm - Rev. 3, Pub. 8/2002
AC CHARACTERISTICS
PARAMETER
WRITE cycle time
WE# (CE#) HIGH pulse width
WE# (CE#) pulse width
Address setup time to WE# (CE#) HIGH
Address hold time from WE# (CE#) HIGH
Data setup time to WE# (CE#) HIGH
Data hold time from WE# (CE#) HIGH
CE# (WE#) setup time to WE# (CE#) LOW
CE# (WE#) hold time from WE# (CE#) HIGH
V
RP# HIGH to WE# (CE#) LOW delay
RP# at V
WRITE duration (WORD or BYTE WRITE)
Boot BLOCK ERASE duration
Parameter BLOCK ERASE duration
Main BLOCK ERASE duration
WE# (CE#) HIGH to busy status (SR7 = 0)
V
RP# at V
Boot block relock delay time
PARAMETER
Boot/parameter BLOCK ERASE time
Main BLOCK ERASE time
Main BLOCK WRITE time (byte mode)
Main BLOCK WRITE time (word mode)
4
PP
PP
U
setup time to WE# (CE#) HIGH
hold time from status data valid
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2. RP# should be held at V
3. Polling status register before
4. WRITE/ERASE times are measured to valid status register data (SR7 = 1).
5.
6. Typical values measured at T
7. Assumes no system overhead.
8. Typical WRITE times use checkerboard data pattern.
HH
HH
t
or WP# HIGH setup time to WE# (CE#) HIGH
or WP# HIGH hold time from status data valid
REL is required to relock boot block after WRITE or ERASE to boot block.
PP
= V
PPH
HH OR
T
A
= 5V.
A
t
+70ºC) and Extended Temperature (-40ºC
WP# held HIGH until boot block WRITE or ERASE is complete.
WB is met may falsely indicate WRITE or ERASE completion.
= +25ºC.
DataSheet4U.com
SMART 5 BOOT BLOCK FLASH MEMORY
t
WPH (
t
SYMBOL
t
t
CH (
WP (
CS (
t
t
t
t
t
WED1
WED2
WED3
WED4
t
t
24
t
t
VPS1
t
t
t
t
RHH
VPH
t
t
RHS
WC
t
WB
REL
AH
DH
AS
DS
RS
t
t
Micron Technology, Inc. Reserves the right to change products or specifications without notice.
WS)
WH)
t
t
CPH)
CP)
1,000
MIN
TYP
200
100
100
100
500
200
4.5
0.5
1.5
80
30
50
50
50
0
0
0
0
0
0
1
1
-8/-8 ET
T
A
MAX
MAX
100
14
7
–
–
+85ºC); V
UNITS
UNITS
CC
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
s
s
s
s
©2002, Micron Technology Inc.
= +5V ±10%
8Mb
NOTES
NOTES
6, 7, 8
6, 7, 8
1
2
4
4
4
4
3
4
2
5
6
6