m29f040 STMicroelectronics, m29f040 Datasheet - Page 14

• Manufacturer Part Number: m29f040
• Description: 4 Mbit 512kb X8, Uniform Block Single Supply Flash Memory
• Manufacturer: STMicroelectronics

M29F040
Table 13A. Write AC Characteristics, Write Enable Controlled
(T
Note: 1. Time is measured to Data Polling or Toggle Bit, t
Erase Resume (ER) instruction. If an Erase Sus-
pend instruction was previously executed, the
erase operation may be resumed by giving the
command 30h, at any address, and without any
coded cycles.
Power Up
The memory Command Interface is reset on power
up to Read Array. Either E or W must be tied to V
during Power-up to allow maximum security and
the possibility to write a command on the first rising
14/31
t
t
Symbol
A
WHQV1
WHQV2
t
t
t
t
t
t
t
t
t
t
t
VCHEL
WHGL
t
WHWL
WLWH
DVWH
WHDX
WHEH
GHWL
= 0 to 70 C, –20 to 85 C, –40 to 85 C or –40 to 125 C)
WLAX
ELWL
AVWL
AVAV
2. The temperature range –40 to 125 C is guaranteed at 70ns with High Speed Interface test condition and V
(1)
(1)
t
t
t
t
t
WPH
Alt
t
t
t
t
t
t
OEH
VCS
WC
WP
CS
DS
DH
CH
AH
AS
Address Valid to Next Address Valid
Chip Enable Low to Write Enable Low
Write Enable Low to Write Enable High
Input Valid to Write Enable High
Write Enable High to Input Transition
Write Enable High to Chip Enable High
Write Enable High to Write Enable Low
Address Valid to Write Enable Low
Write Enable Low to Address Transition
Output Enable High to Write Enable Low
V
Write Enable High to Output Valid (Program)
Write Enable High to Output Valid
(Block Erase)
Write Enable High to Output Enable Low
CC
High to Chip Enable Low
Parameter
WHQV
= t
IH
WHQ7V
+ t
adge of E or W. Any write cycle initiation is blocked
when V
Supply Rails
Normal precautions must be taken for supply volt-
age decoupling, each device in a system should
have the V
close to the V
widths should be sufficient to carry the V
gram and erase currents required.
Q7VQV
(2)
V
Min
CC
1.0
70
35
30
20
45
50
10
CC
0
0
0
0
0
0
Standard
Interface
CC
= 5V
is below V
-70
rail decoupled with a 1.0 F capacitor
CC
Max
10%
30
and V
M29F040
LKO
.
SS
V
Min
1.0
CC
90
45
45
20
45
50
10
0
0
0
0
0
0
Standard
Interface
pins. The PCB trace
= 5V
-90
CC
= 5V
Max
10%
30
5%.
CC
Unit
sec
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pro-
s
s